CN111263562B - Diversified integrated cooling system of data center and control method - Google Patents
Diversified integrated cooling system of data center and control method Download PDFInfo
- Publication number
- CN111263562B CN111263562B CN201911196364.0A CN201911196364A CN111263562B CN 111263562 B CN111263562 B CN 111263562B CN 201911196364 A CN201911196364 A CN 201911196364A CN 111263562 B CN111263562 B CN 111263562B
- Authority
- CN
- China
- Prior art keywords
- saving
- energy
- cooling
- cold
- unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20836—Thermal management, e.g. server temperature control
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/208—Liquid cooling with phase change
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/208—Liquid cooling with phase change
- H05K7/20827—Liquid cooling with phase change within rooms for removing heat from cabinets, e.g. air conditioning devices
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a diversified comprehensive cooling system of a data center and a control method, wherein the diversified comprehensive cooling system comprises M basic cooling unit refrigeration hosts, at least one indoor unit with double evaporation coils, and a controller, wherein M is more than or equal to 1; the indoor unit comprises an energy-saving and emergency cooling evaporation coil, a basic cooling unit evaporation coil, a fan, an energy-saving and emergency evaporation coil steam path electric regulating valve and a basic cooling unit evaporation coil steam path electric regulating valve; the cold storage electric two-way switch valve is connected with the cold storage tank through a cold storage water supply pipe and a cold storage water supply pipe. The invention has the characteristics of safety, reliability, simple maintenance, energy saving, water saving, freezing prevention, flexible construction and investment saving.
Description
Technical Field
The invention relates to the technical field of cooling and heat dissipation of a data center, in particular to a diversified comprehensive cooling system and a control method for the data center.
Background
The large and medium-sized data center usually adopts a water-cooling chilled water system, chilled water and cooling water pipelines generally adopt a double-pipeline or ring network system form, a plurality of valves are provided, operation switching modules are complex, the installation quality of a pipeline system and a control system is limited by construction level and is not uniform, and the supporting and control are difficult; the requirement on maintenance personnel is high, and if the design concept of the system is not understood thoroughly, the energy-saving advantage of the system is difficult to be exerted; at the initial stage of low installation rate of the data center, the refrigerating unit is difficult to start, and needs to run alternately with the cold accumulation tank, so that a series of problems of large carriage, high running cost, energy conservation and the like exist. In northern areas, when outdoor temperature is very low in winter, heat dissipation still needs to be carried out through water evaporation, so that not only is water resource consumed, but also the anti-freezing problem of a cooling tower exists.
The small-size data center adopts air-cooled unit formula air conditioning unit, can solve a series of problems of large-scale water system, but refrigeration efficiency is low, hardly satisfies industry and information department PUE in the south of the Yangtze river and equals the requirement below 1.4, and the UPS power supply is adopted to air-cooled unit formula air conditioner to emergent guarantee cooling, invests in great.
Disclosure of Invention
The invention aims to overcome the problems of a water-cooling refrigeration system and the defect of low refrigeration efficiency of an air-cooling unit type air conditioning unit in the prior art, and provides a diversified comprehensive cooling system and a control method for a data center.
In order to achieve the purpose, the invention adopts the following technical scheme:
a diversified integrated cooling system of a data center comprises M basic cooling unit refrigeration hosts, at least one indoor unit with double evaporation coils and a cooling unit, wherein the indoor unit is connected with the basic cooling unit refrigeration hosts, and M is more than or equal to 1; the indoor unit comprises an energy-saving and emergency cooling evaporation coil, a basic cooling unit evaporation coil, a fan, an energy-saving and emergency evaporation coil steam path electric regulating valve and a basic cooling unit evaporation coil steam path electric regulating valve; the cold storage electric two-way switch valve is connected with the cold storage tank; the cold storage tank is connected with M energy-saving and emergency cold supply pipelines through a water supply pipeline and a water return pipeline, and each energy-saving and emergency cold supply pipeline comprises a heat exchanger, an energy-saving and emergency cold supply system liquid supply pipe and an energy-saving and emergency cold supply system steam pipe; the heat exchanger of each energy-saving and emergency cooling pipeline is connected with the energy-saving and emergency cooling evaporation coil pipe of each indoor unit corresponding to the basic cooling unit refrigeration host through an emergency cooling system liquid supply pipe and an energy-saving and emergency cooling system steam pipe; fill cold cooling water set and cold-storage jar through filling cold water supply pipe way and filling cold return water pipe connection, when filling cold, fill cold water set and open, through filling the cold pump with cold water input cold-storage jar, high temperature water fills cold return water pipe and returns to filling cold water set recooling, forms the circulation, and the temperature keeps invariable in the cold-storage jar.
The invention integrates three functions of natural cooling, emergency cooling and basic unit fault cooling into an energy-saving and emergency cooling system; the cold water charging and cooling unit is simultaneously used as a basic unit backup unit to backup and share all basic cooling units in the jurisdiction range of the energy-saving and emergency cooling system; an energy saving and emergency cooling system serves a plurality of base cooling units.
The invention is in an online hot backup mode, the controller ensures that the differential pressure value of the differential pressure sensor is constant, and the flow sensor ensures that the flow with a set value G circulates online at any time in the system.
Preferably, the energy-saving electric two-way switch valve also comprises an energy-saving unit and an energy-saving electric two-way switch valve; the energy-saving unit is connected with the energy-saving and emergency cooling pipeline through the water supply pipeline and the water return pipeline, when the energy-saving unit is in energy-saving operation, the cooling pump is started, the energy-saving electric two-way switching valve is opened, the cold accumulation tank electric two-way switching valve is closed, the energy-saving unit is opened, cold water is supplied to each heat exchanger through the water supply pipeline, and the water is returned to the energy-saving unit through the water return pipe after being subjected to heat exchange and temperature rise, so that the energy-saving cold cooling cycle is completed;
the cold storage tank is connected with the energy-saving and emergency cold supply pipeline through the water supply pipeline and the water return pipeline, when the cold storage tank supplies cold, the cold supply pump is started, the electric two-way switch valve of the cold storage tank is opened, the energy-saving unit and the energy-saving electric two-way switch valve are closed, cold water is supplied to the heat exchanger through the water supply pipeline, and water is returned to the cold storage tank through the water return pipe after being subjected to heat exchange and temperature rise to complete emergency cold supply circulation.
Each basic cooling unit is only provided with one cooling host, and the maximum refrigerating capacity of the basic cooling unit host is configured by multiplying the sum of the cold load required by one row of no more than 25 cabinets or the sum of the cold load required by two rows of no more than 50 cabinets and the corresponding additional cold load by 1.05.
The basic cold supply unit host machine refrigerating capacity is adjusted by adjusting the rotating speed of the compressor through the return air pressure parameter of the refrigerating compressor to achieve output refrigerating capacity adjustment. The energy-saving and emergency evaporating coil and the basic cooling evaporating coil in the indoor unit are respectively controlled by different evaporating temperatures, the energy-saving and emergency evaporating coil is controlled by variable evaporating temperatures, and the basic cooling evaporating coil is controlled by fixed evaporating temperatures.
Each base unit is provided with a controller, the energy-saving and emergency cooling system is provided with a controller, the base cooling unit controller and the energy-saving and emergency cooling system controller are communicated with each other, but the base cooling unit controller and the energy-saving and emergency cooling system controller are mutually independent.
Preferably, the basic unit cooling mode: the basic cooling unit refrigeration host provides low-pressure low-temperature liquid refrigerant, the liquid refrigerant is input into the basic cooling unit evaporation coils of the N indoor units through refrigerant liquid pipelines, and the vapor refrigerant coming out of the basic cooling unit evaporation coils is returned to the basic cooling unit refrigeration host through a refrigerant vapor pipeline; and completing the refrigeration cycle, and when the indoor unit needs to be overhauled, turning off a shutoff valve connecting the indoor unit with the refrigerant liquid pipeline and the refrigerant gas pipeline, wherein N is more than or equal to 1.
Preferably, the partial natural cooling mode: opening a heat exchange electric two-way valve regulating valve arranged on a liquid supply pipe of an emergency cooling pipeline, opening the valve to the maximum opening degree, opening an energy-saving unit and an energy-saving electric two-way valve, conveying high-temperature cold water to M heat exchangers through a cooling pump, wherein a refrigerant cooled by each heat exchanger is called a high-temperature refrigerant, the temperature of the high-temperature refrigerant is higher than that of a low-pressure low-temperature liquid refrigerant by delta t, the high-temperature refrigerant flows to a liquid storage tank under the action of gravity, the high-temperature refrigerant is pressurized by a fluorine pump and then is supplied to an energy-saving and emergency cooling evaporation coil with an indoor unit through a liquid supply pipe of the energy-saving and emergency cooling pipeline, the high-temperature liquid refrigerant is evaporated into vapor and then returns to each heat exchanger through a vapor pipe of the energy-saving and emergency cooling pipeline, and the heated cold water returns to the energy-saving unit through a water return pipe to finish partial natural cooling;
the system also comprises a basic cooling unit controller and an intermediate temperature sensor arranged between the energy-saving and emergency cooling evaporation coil and the basic cooling unit evaporation coil, wherein the intermediate temperature sensor is electrically connected with the basic cooling unit controller, and the basic cooling unit controller is internally provided with an air outlet temperature t;
when the temperature detected by the intermediate temperature sensor is less than t, the basic cooling unit supply controller opens the electric regulating valve of the steam path of the evaporation coil of the basic cooling unit, the basic cooling unit controller opens the refrigeration host of each basic cooling unit to provide low-pressure low-temperature refrigerant liquid, the low-pressure low-temperature refrigerant liquid is input into the evaporation coil of the basic cooling unit in the indoor unit through a refrigerant liquid pipeline, the heat absorbed after evaporation is changed into steam, the steam returns to the refrigeration host of the basic cooling unit through the refrigerant steam pipeline, and the return air reaches the air outlet temperature t after being further cooled by the evaporation coil of the basic cooling unit, so that the cold supplementing and cooling cycle is completed.
Preferably, all natural cooling modes:
scenario one: when the basic cooling unit refrigeration host does not have a natural cooling function, the energy-saving unit provides high-temperature cold water, the energy-saving electric two-way switching valve and the heat exchange electric two-way valve regulating valve are opened, the cold water is conveyed to each heat exchanger by the cold supply pump through the water supply pipeline to exchange heat with a gas refrigerant returned from a steam pipe of the energy-saving and emergency cooling system, and the high-temperature cold water is returned to the energy-saving unit through the water return pipeline after being heated and then is cooled to finish heat transfer; after the refrigerant is cooled into liquid refrigerant by each heat exchanger, the refrigerant flows to the liquid storage tank under the action of gravity, is pressurized by a fluorine pump and is supplied to the energy-saving and emergency cooling evaporation coil pipe of the indoor unit through the energy-saving and emergency cooling system liquid supply pipe, and the liquid refrigerant is evaporated into vapor and then returns to each heat exchanger through the energy-saving and emergency cooling system vapor pipe to complete all natural cooling circulation;
scenario two: when the basic cooling unit refrigeration host machine carries out natural cooling, the heat exchange electric two-way regulating valve is closed, the basic cooling unit refrigeration host machine is switched to a complete natural cooling mode, a refrigerant is input into the basic cooling unit evaporation coil of the indoor machine through a refrigerant liquid pipeline, and after evaporation, absorbed heat is changed into vapor which returns to the basic cooling unit refrigeration host machine through a refrigerant vapor pipeline, so that refrigeration cycle is completed.
Preferably, the basic cooling unit failure cooling mode is as follows: when the refrigeration host of the basic cooling unit breaks down, the cooling water chilling unit, the cooling electric two-way regulating valve and the cooling pump are started to carry out cooling, the energy-saving electric switch valve and the energy-saving unit are closed, the electric two-way switch valve of the cold storage tank is opened, water in the cold storage tank is conveyed to each heat exchanger by the cooling pump through a water supply pipeline, each heat exchanger exchanges heat with a gas refrigerant returned from a steam pipe of the energy-saving and emergency cooling system, and the cold water is returned to the cold storage tank through a water return pipeline after being heated; the refrigerant is cooled into liquid refrigerant by each heat exchanger, flows to the liquid storage tank under the action of gravity, is pressurized by the fluorine pump and then is supplied to the energy-saving and emergency cooling evaporation coil of the indoor unit through the energy-saving and emergency cooling system liquid supply pipe, and the liquid refrigerant is evaporated into vapor and then returns to the heat exchanger through the energy-saving and emergency cooling system vapor pipe to complete the heat exchange cycle.
Preferably, the emergency cooling mode comprises: when a refrigeration host of the basic cooling unit loses power, the energy-saving and emergency controller powered by the UPS is adopted to close the cold-charging electric two-way valve, close the energy-saving electric two-way switch valve and open the cold-storage tank electric two-way switch valve, water in the cold-storage tank is conveyed to each heat exchanger by a cold supply pump (powered by the UPS) through a water supply pipeline to exchange heat with a vapor refrigerant returned from a vapor pipe of the energy-saving and emergency cooling system, and cold water is returned to the cold-storage tank through a water return pipeline after being heated to complete heat transfer; after being cooled into liquid refrigerant by the heat exchanger, the refrigerant flows to the liquid storage tank under the action of gravity, is pressurized by the fluorine pump and is supplied to the energy-saving and emergency cooling evaporation coil of the indoor unit through the emergency cooling system liquid supply pipe, and the liquid refrigerant is evaporated into vapor and then returns to the heat exchanger through the energy-saving and emergency cooling system vapor pipe to complete the heat exchange cycle.
The cooler adopted for natural cooling is divided into two cooling modes: when the outdoor wet sphericity is high and there is no icing risk, adopting wet cooling by water spraying; when the outdoor temperature is low and the heat dissipation requirement is met, dry cooling without water spraying is adopted for saving water resources.
The control method of the diversified integrated cooling system of the data center further comprises a wet bulb temperature sensor and a dry bulb temperature sensor which are arranged outdoors; the basic cooling unit controller is respectively and electrically connected with the wet bulb temperature sensor and the dry bulb temperature sensor;
step 1: a standard outdoor wet bulb temperature interval [ A1, A2] is arranged in a basic cooling unit controller, and a wet bulb temperature sensor detects the wet bulb temperature A; a standard outdoor dry bulb temperature range [ B1, B2] is arranged in the controller, and a dry bulb temperature sensor detects that the wet bulb temperature is B.
Step 2: the basic unit cooling controller switches the cooling modes according to the wet bulb temperature A as follows:
(1) when the wet bulb temperature A is larger than or equal to A2, entering a basic unit cooling mode;
(2) when the wet bulb temperature A2 is more than A and is not less than A1, entering a partial natural cooling mode, namely wet cooling;
(3) when the wet bulb temperature A1 is more than A and B is more than or equal to B2, entering a full natural cooling mode, namely wet cooling;
(4) when the outdoor dry bulb temperature B1 is more than or equal to B, entering a full natural cooling mode, namely dry cooling; wherein B1 is less than B2;
(5) when any basic cooling unit refrigeration host fails, entering a basic cooling unit failure cooling mode;
(6) and when the basic cooling unit refrigeration host loses power, the emergency cooling mode is entered.
A control method in a diversified integrated cooling system of a data center comprises the following control steps:
a first communicating pipe and a second communicating pipe are arranged between the water supply pipe and the water return pipe, the first communicating pipe is provided with a differential pressure pipe conveyor, and the second communicating pipe is provided with a flow sensor and an electric two-way regulating valve; a temperature sensor is arranged in the cold storage tank; the pressure difference P is detected by the pressure difference pipe conveyer, the flow G is detected by the flow sensor, and the temperature E in the cold storage tank is detected by the temperature sensor; the basic cooling unit controller is respectively and electrically connected with the differential pressure pipe conveyer, the flow sensor, the electric two-way regulating valve and the temperature sensor;
step 2: the energy-saving and emergency controller carries out the following control steps:
1) when P is more than or equal to P2, the energy-saving and emergency controller reduces the rotating speed of the cooling pump; when the pressure difference value P1 is more than or equal to P, the energy-saving and emergency controller increases the rotating speed of the cooling pump; wherein P1 is less than P2;
2) when G1 is larger than or equal to G, the opening of the electric two-way regulating valve is opened by the energy-saving and emergency controller, and when G is larger than or equal to G2, the opening of the electric two-way regulating valve is closed by the energy-saving and emergency controller; wherein G1 is less than G2;
3) and when the E value is more than or equal to the E2 value, the energy-saving and emergency controller starts the cold-filling pump and the cold-filling water chilling unit, and when the E1 value is more than or equal to the E value, the energy-saving and emergency controller closes the cold-filling pump and the cold-filling water chilling unit and keeps the electric valve in a closed state, wherein E1 is more than E2.
Therefore, the invention has the following beneficial effects: safe and reliable, simple maintenance, energy saving, water saving, antifreezing, flexible construction and investment saving.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a basic cooling unit refrigeration main unit of the present invention;
fig. 3 is a functional block diagram of the present invention.
In the figure: a basic cold supply unit refrigeration host 1, an indoor machine 7, an emergency cold supply evaporation coil 7-1, a basic cold supply unit evaporation coil 7-2, a fan 7-3, an energy-saving and emergency evaporation coil steam-path electric regulating valve 7-4, a basic cold supply unit evaporation coil steam-path electric regulating valve 7-5, a cold accumulation tank 17, a cold accumulation electric two-way switch valve 18, a cold filling pump 19, a cold filling electric two-way switch valve 20, a cold filling water cooling unit 21, a cold filling water supply pipe 24, a cold filling water return pipe 25, a cold supply pump 26, a water supply pipe 12, a water return pipe 13, a heat exchanger 10, an energy-saving and emergency cold supply system liquid supply pipe 5, an energy-saving and emergency cold supply system steam pipe 6, a cold filling water supply pipe 24, a cold filling water return pipe 25, a cold filling pump 19, an energy-saving unit 23, an energy-saving electric two-way switch valve 22, The system comprises a cold storage tank electric two-way switch valve 18, a water supply pipe 12, a water return pipe 13, a refrigerant liquid pipeline 2, a refrigerant gas pipeline 3, a shutoff valve 4, a heat exchange electric two-way valve regulating valve 11, a liquid storage tank 9, a fluorine pump 8, a basic cold supply unit controller 40, an intermediate temperature sensor 41, a differential pressure pipe transmitter 14, a flow sensor 15, an electric two-way regulating valve 16, an energy-saving and emergency controller 30, a wet bulb temperature sensor 101, a dry bulb temperature sensor 102 and a temperature sensor 103.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The embodiment shown in fig. 1 and 2 is a diversified integrated cooling system for a data center, which includes M basic cooling unit refrigeration hosts 1, and a plurality of indoor units 7 with double evaporation coils, connected to the basic cooling unit refrigeration hosts; the indoor unit comprises an energy-saving and emergency cooling evaporation coil 7-1, a basic cooling unit evaporation coil 7-2, a fan 7-3, an energy-saving and emergency evaporation coil steam path electric regulating valve 7-4 and a basic cooling unit evaporation coil steam path electric regulating valve 7-5; the fan is shared by the emergency cooling evaporation coil and the basic cooling unit evaporation coil;
the cold storage device also comprises a cold storage tank 17, a cold storage electric two-way switch valve 18, a cold filling pump 19, a cold filling electric two-way switch valve 20, a cold filling water chilling unit 21, a cold filling water supply pipe 24, a cold filling water return pipe 25 and a cold supply pump 26; the cold storage tank is connected with each energy-saving and emergency cold supply pipeline through a water supply pipeline 12 and a water return pipeline 13, and the energy-saving and emergency cold supply pipeline comprises a heat exchanger 10, an energy-saving and emergency cold supply system liquid supply pipe 5 and an energy-saving and emergency cold supply system steam pipe 6; the heat exchanger of each energy-saving and emergency cooling pipeline is connected with the energy-saving and emergency cooling evaporation coil pipe of each indoor unit corresponding to the basic cooling unit refrigeration host through an energy-saving and emergency cooling system liquid supply pipe 5 and an energy-saving and emergency cooling system steam pipe; fill cold cooling water set and cold-storage jar and be connected through filling cold water supply pipe way 24 and filling cold return water pipeline 25, when filling cold, fill cold cooling water set and open, through filling cold pump 19 with cold water input cold-storage jar, high temperature water fills cold return water pipe and returns to and fills cold cooling water set and recool, forms the circulation, and the temperature keeps invariable in the cold-storage jar.
The energy-saving electric two-way switch valve also comprises an energy-saving unit 23 and an energy-saving electric two-way switch valve 22; the energy-saving unit is connected with the energy-saving and emergency cooling pipeline through the water supply pipeline and the water return pipeline, when the energy-saving unit is in energy-saving operation, the cooling pump is started, the energy-saving electric two-way switch valve is opened, the cold accumulation tank electric two-way switch valve 18 is closed, the energy-saving unit is opened, cold water is supplied to each heat exchanger through the water supply pipeline 12, and the water is returned to the energy-saving unit through the water return pipe 13 after heat exchange and temperature rise, so that energy-saving cold cooling circulation is completed;
the cold storage tank is connected with the energy-saving and emergency cold supply pipeline through the water supply pipeline and the water return pipeline, when the cold storage tank supplies cold, the cold supply pump is started, the electric two-way switch valve of the cold storage tank is opened, the energy-saving unit and the energy-saving electric two-way switch valve are closed, cold water is supplied to the heat exchanger through the water supply pipeline, and water is returned to the cold storage tank through the water return pipe after being subjected to heat exchange and temperature rise to complete emergency cold supply circulation.
Base unit cooling mode: the basic cooling unit refrigeration host provides low-pressure low-temperature liquid refrigerant, the liquid refrigerant is input into basic cooling unit evaporation coils of the indoor units through a refrigerant liquid pipeline 2, and a vapor refrigerant coming out of the basic cooling unit evaporation coils is returned to the basic cooling unit refrigeration host through a refrigerant vapor pipeline 3; and completing the refrigeration cycle, and when the indoor unit needs to be overhauled, shutting off the shut-off valve 4 connecting the indoor unit with the refrigerant liquid pipeline and the refrigerant vapor pipeline.
Partial natural cooling mode: opening a heat exchange electric two-way valve regulating valve 11 arranged on a liquid supply pipe of an emergency cooling pipeline, opening to the maximum opening, opening an energy-saving unit and an energy-saving electric two-way valve, conveying high-temperature cold water to a plurality of heat exchangers through a cooling pump, wherein a refrigerant cooled by each heat exchanger is called a high-temperature refrigerant, the temperature of the high-temperature refrigerant is higher than that of a low-pressure low-temperature liquid refrigerant by delta t, the high-temperature refrigerant flows to a liquid storage tank 9 under the action of gravity, the high-temperature refrigerant is pressurized by a fluorine pump 8 and then is supplied to an energy-saving and emergency cooling evaporation coil with an indoor unit through a liquid supply pipe of the energy-saving and emergency cooling pipeline, the high-temperature liquid refrigerant is evaporated into vapor and then returns to each heat exchanger through a vapor pipe of the energy-saving and emergency cooling pipeline, and heated cold water returns to the energy-saving unit through a water return pipe to finish partial natural cooling;
as shown in fig. 3, the emergency cooling system further comprises a basic cooling unit controller 40, and an intermediate temperature sensor 41 arranged between the energy-saving and emergency cooling evaporating coil and the basic cooling unit evaporating coil, wherein the intermediate temperature sensor is electrically connected with the basic cooling unit controller, and an air outlet temperature t is arranged in the basic cooling unit controller;
when the temperature detected by the intermediate temperature sensor is less than t, the basic cooling unit supply controller opens the electric regulating valve of the steam path of the evaporation coil of the basic cooling unit, the basic cooling unit controller opens the refrigeration host of each basic cooling unit to provide low-pressure low-temperature refrigerant liquid, the low-pressure low-temperature refrigerant liquid is input into the evaporation coil of the basic cooling unit in the indoor unit through a refrigerant liquid pipeline, the heat absorbed after evaporation is changed into steam, the steam returns to the refrigeration host of the basic cooling unit through the refrigerant steam pipeline, and the return air reaches the air outlet temperature t after being further cooled by the evaporation coil of the basic cooling unit, so that the cold supplementing and cooling cycle is completed.
All natural cooling modes:
scenario one: when the basic cooling unit refrigeration host does not have a natural cooling function, the energy-saving unit provides high-temperature cold water, the energy-saving electric two-way switching valve and the heat exchange electric two-way valve regulating valve are opened, the cold water is conveyed to each heat exchanger by the cold supply pump through the water supply pipeline to exchange heat with a gas refrigerant returned from a steam pipe of the energy-saving and emergency cooling system, and the high-temperature cold water is returned to the energy-saving unit through the water return pipeline after being heated and then is cooled to finish heat transfer; after the refrigerant is cooled into liquid refrigerant by each heat exchanger, the refrigerant flows to the liquid storage tank under the action of gravity, is pressurized by the fluorine pump and is supplied to the energy-saving and emergency cooling evaporation coil pipe of the indoor unit through the energy-saving and emergency cooling system liquid supply pipe, and the liquid refrigerant is evaporated into vapor and then returns to each heat exchanger through the energy-saving and emergency cooling system vapor pipe to complete all natural cooling circulation.
Scenario two: when the basic cooling unit refrigeration host machine carries out natural cooling, the heat exchange electric two-way regulating valve is closed, the basic cooling unit refrigeration host machine is switched to a complete natural cooling mode, a refrigerant is input into the basic cooling unit evaporation coil of the indoor machine through a refrigerant liquid pipeline, and after evaporation, absorbed heat is changed into vapor which returns to the basic cooling unit refrigeration host machine through a refrigerant vapor pipeline, so that refrigeration cycle is completed.
Basic cooling unit failure cooling mode: when the refrigeration host of the basic cooling unit breaks down, the cooling water chilling unit, the cooling electric two-way regulating valve and the cooling pump are started to carry out cooling, the energy-saving electric switch valve and the energy-saving unit are closed, the electric two-way switch valve of the cold storage tank is opened, water in the cold storage tank is conveyed to each heat exchanger by the cooling pump through a water supply pipeline, each heat exchanger exchanges heat with a gas refrigerant returned from a steam pipe of the energy-saving and emergency cooling system, and the cold water is returned to the cold storage tank through a water return pipeline after being heated; the refrigerant is cooled into liquid refrigerant by each heat exchanger, flows to the liquid storage tank under the action of gravity, is pressurized by the fluorine pump and then is supplied to the energy-saving and emergency cooling evaporation coil of the indoor unit through the energy-saving and emergency cooling system liquid supply pipe, and the liquid refrigerant is evaporated into vapor and then returns to the heat exchanger through the energy-saving and emergency cooling system vapor pipe to complete the heat exchange cycle.
Emergency cooling mode: when the refrigeration host of the basic cooling unit loses power, the cold charging electric two-way valve is closed, the energy-saving electric two-way switch valve is closed, the cold accumulation tank electric two-way switch valve is opened, water in the cold accumulation tank is conveyed to each heat exchanger by a cold supply pump through a water supply pipeline to exchange heat with a vapor refrigerant returned from a vapor pipe of the energy-saving and emergency cooling system, and the cold water is returned to the cold accumulation tank through a water return pipeline after being heated, so that heat transfer is completed; after being cooled into liquid refrigerant by the heat exchanger, the refrigerant flows to the liquid storage tank under the action of gravity, is pressurized by the fluorine pump and is supplied to the energy-saving and emergency cooling evaporation coil of the indoor unit through the energy-saving and emergency cooling system liquid supply pipe, and the liquid refrigerant is evaporated into vapor and then returns to the heat exchanger through the energy-saving and emergency cooling system vapor pipe to complete heat exchange circulation.
A control method of a diversified integrated cooling system of a data center further comprises a wet bulb temperature sensor 101 and a dry bulb temperature sensor 102 which are arranged outdoors; the basic cooling unit controller is respectively and electrically connected with the wet bulb temperature sensor and the dry bulb temperature sensor;
step 1: a standard outdoor wet bulb temperature interval [ A1, A2] is arranged in a basic cooling unit controller, and a wet bulb temperature sensor detects the wet bulb temperature A; a standard outdoor dry bulb temperature range [ B1, B2] is arranged in the controller, and a dry bulb temperature sensor detects that the wet bulb temperature is B.
Step 2: the basic unit cooling controller switches the cooling modes according to the wet bulb temperature A as follows:
(1) when the wet bulb temperature A is larger than or equal to A2, entering a basic unit cooling mode;
(2) when the wet bulb temperature A2 is more than A and is not less than A1, entering a partial natural cooling mode, namely wet cooling;
(3) when the wet bulb temperature A1 is more than A and B is more than or equal to B2, entering a full natural cooling mode, namely wet cooling;
(4) when the outdoor dry bulb temperature B1 is more than or equal to B, entering a full natural cooling mode, namely dry cooling; wherein B1 is less than B2;
(5) when any basic cooling unit refrigeration host fails, entering a basic cooling unit failure cooling mode;
(6) and when the basic cooling unit refrigeration host loses power, the emergency cooling mode is entered.
A control method in a diversified integrated cooling system of a data center comprises the following control steps:
a first communicating pipe and a second communicating pipe are arranged between the water supply pipe and the water return pipe, the first communicating pipe is provided with a differential pressure pipe transmitter 14, and the second communicating pipe is provided with a flow sensor 15 and an electric two-way regulating valve 16; a temperature sensor 103 is arranged in the cold storage tank; the pressure difference P is detected by the pressure difference pipe conveyer, the flow G is detected by the flow sensor, and the temperature E in the cold storage tank is detected by the temperature sensor; the basic cooling unit controller 30 is respectively and electrically connected with the differential pressure pipe conveyer, the flow sensor, the electric two-way regulating valve and the temperature sensor;
step 2: the energy saving and emergency controller 30 performs the following control steps:
1) when P is more than or equal to P2, the energy-saving and emergency controller reduces the rotating speed of the cooling pump; when the pressure difference value P1 is more than or equal to P, the energy-saving and emergency controller increases the rotating speed of the cooling pump; wherein P1 is less than P2;
2) when G1 is larger than or equal to G, the opening of the electric two-way regulating valve is opened by the energy-saving and emergency controller, and when G is larger than or equal to G2, the opening of the electric two-way regulating valve is closed by the energy-saving and emergency controller; wherein G1 is less than G2;
3) and when the E value is more than or equal to the E2 value, the energy-saving and emergency controller starts the cold-filling pump and the cold-filling water chilling unit, and when the E1 value is more than or equal to the E value, the energy-saving and emergency controller closes the cold-filling pump and the cold-filling water chilling unit and keeps the electric valve in a closed state, wherein E1 is more than E2.
It should be understood that this example is for illustrative purposes only and is not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Claims (8)
1. A diversified integrated cooling system of a data center is characterized by comprising M basic cooling unit refrigeration hosts (1) and at least one indoor unit (7) with double evaporation coils, wherein the indoor unit (7) is connected with the basic cooling unit refrigeration hosts, and M is more than or equal to 1; the indoor unit comprises an energy-saving and emergency cooling evaporation coil (7-1), a basic cooling unit evaporation coil (7-2), a fan (7-3), an energy-saving and emergency evaporation coil steam circuit electric regulating valve (7-4) and a basic cooling unit evaporation coil steam circuit electric regulating valve (7-5); the cold storage device also comprises a cold storage tank (17), a cold storage electric two-way switch valve (18), a cold charging pump (19), a cold charging electric two-way switch valve (20), a cold charging water chilling unit (21), a cold charging water supply pipe (24), a cold charging water return pipe (25) and a cold supply pump (26); the cold storage tank is connected with M energy-saving and emergency cold supply pipelines through a water supply pipeline (12) and a water return pipeline (13), and each energy-saving and emergency cold supply pipeline comprises a heat exchanger (10), an energy-saving and emergency cold supply system liquid supply pipe (5) and an energy-saving and emergency cold supply system steam pipe (6); the heat exchanger of each energy-saving and emergency cooling pipeline is connected with the energy-saving and emergency cooling evaporation coil pipe of each indoor unit corresponding to the basic cooling unit refrigeration host through an energy-saving and emergency cooling system liquid supply pipe (5) and an energy-saving and emergency cooling system steam pipe; the cold filling water chilling unit is connected with the cold storage tank through a cold filling water supply pipeline (24) and a cold filling water return pipeline (25), when cold filling is carried out, the cold filling water chilling unit is started, cold water is input into the cold storage tank through a cold filling pump (19), high-temperature water is returned to the cold filling water chilling unit through the cold filling water return pipeline to be chilled, circulation is formed, and the water temperature in the cold storage tank is kept constant;
the energy-saving electric two-way switch valve also comprises an energy-saving unit (23) and an energy-saving electric two-way switch valve (22); the energy-saving unit is connected with the energy-saving and emergency cooling pipeline through a water supply pipeline and a water return pipeline, when the energy-saving unit is in energy-saving operation, a cooling pump is started, an energy-saving electric two-way switch valve is opened, an electric two-way switch valve (18) of a cold accumulation tank is closed, the energy-saving unit is opened, cold water is supplied to each heat exchanger through a water supply pipeline (12), and water is returned to the energy-saving unit through a water return pipe (13) after being subjected to heat exchange and temperature rise, so that energy-saving cooling circulation is completed;
the cold storage tank is connected with the energy-saving and emergency cold supply pipeline through the water supply pipeline and the water return pipeline, when the cold storage tank supplies cold, the cold supply pump is started, the electric two-way switch valve of the cold storage tank is opened, the energy-saving unit and the energy-saving electric two-way switch valve are closed, cold water is supplied to the heat exchanger through the water supply pipeline, and water is heated through heat exchange and then returns to the cold storage tank through the water return pipe to complete emergency cold supply circulation.
2. The method of controlling a data center diversified integrated cooling system according to claim 1, wherein the base unit cooling mode: the basic cooling unit refrigeration host provides low-pressure low-temperature liquid refrigerant, the liquid refrigerant is input into the basic cooling unit evaporation coils of the N indoor units through a refrigerant liquid pipeline (2), and a gas refrigerant coming out of the basic cooling unit evaporation coils returns to the basic cooling unit refrigeration host through a refrigerant gas pipeline (3); and completing the refrigeration cycle, and when the indoor unit needs to be overhauled, shutting off a shut-off valve (4) connecting the indoor unit with a refrigerant liquid pipeline and a refrigerant gas pipeline, wherein N is more than or equal to 1.
3. The method for controlling a data center diversified integrated cooling system according to claim 2, wherein the partial natural cooling mode: opening a heat exchange electric two-way valve regulating valve (11) arranged on a liquid supply pipe of an emergency cooling pipeline, opening to the maximum opening, opening an energy-saving unit and an energy-saving electric two-way valve, conveying high-temperature cold water to M heat exchangers through a cooling pump, wherein a refrigerant cooled by each heat exchanger is called a high-temperature refrigerant, the temperature of the high-temperature refrigerant is higher than that of a low-pressure low-temperature liquid refrigerant by delta t, the high-temperature refrigerant flows to a liquid storage tank (9) under the action of gravity, the high-temperature refrigerant is pressurized by a fluorine pump (8) and then is supplied to an energy-saving and emergency cooling evaporation coil with an indoor unit through a liquid supply pipe of the energy-saving and emergency cooling pipeline, the high-temperature liquid refrigerant is evaporated into vapor and then returns to each heat exchanger through a vapor pipe of the energy-saving and emergency cooling pipeline, and heated cold water returns to the energy-saving unit through a water return pipe to finish partial natural cooling;
the system also comprises a basic cooling unit controller (40) and an intermediate temperature sensor (41) arranged between the energy-saving and emergency cooling evaporation coil and the basic cooling unit evaporation coil, wherein the intermediate temperature sensor is electrically connected with the basic cooling unit controller, and the basic cooling unit controller is internally provided with an air outlet temperature t;
when the temperature detected by the intermediate temperature sensor is less than t, the basic cooling unit supply controller opens the electric regulating valve of the steam path of the evaporation coil of the basic cooling unit, the basic cooling unit controller opens the refrigeration host of each basic cooling unit to provide low-pressure low-temperature refrigerant liquid, the low-pressure low-temperature refrigerant liquid is input into the evaporation coil of the basic cooling unit in the indoor unit through a refrigerant liquid pipeline, the heat absorbed after evaporation is changed into steam, the steam returns to the refrigeration host of the basic cooling unit through the refrigerant steam pipeline, and the return air reaches the air outlet temperature t after being further cooled by the evaporation coil of the basic cooling unit, so that the cold supplementing and cooling cycle is completed.
4. The method for controlling the diversified integrated cooling system of the data center according to claim 3, wherein all natural cooling modes:
scenario one: when the basic cooling unit refrigeration host does not have a natural cooling function, the energy-saving unit provides high-temperature cold water, the energy-saving electric two-way switching valve and the heat exchange electric two-way valve regulating valve are opened, the cold water is conveyed to each heat exchanger by the cold supply pump through the water supply pipeline to exchange heat with a gas refrigerant returned from a steam pipe of the energy-saving and emergency cooling system, and the high-temperature cold water is returned to the energy-saving unit through the water return pipeline after being heated and then is cooled to finish heat transfer; after the refrigerant is cooled into liquid refrigerant by each heat exchanger, the refrigerant flows to the liquid storage tank under the action of gravity, is pressurized by a fluorine pump and is supplied to the energy-saving and emergency cooling evaporation coil pipe of the indoor unit through the energy-saving and emergency cooling system liquid supply pipe, and the liquid refrigerant is evaporated into vapor and then returns to each heat exchanger through the energy-saving and emergency cooling system vapor pipe to complete all natural cooling circulation;
scenario two: when the basic cooling unit refrigeration host machine carries out natural cooling, the heat exchange electric two-way regulating valve is closed, the basic cooling unit refrigeration host machine is switched to a complete natural cooling mode, a refrigerant is input into the basic cooling unit evaporation coil of the indoor machine through a refrigerant liquid pipeline, and after evaporation, absorbed heat is changed into vapor which returns to the basic cooling unit refrigeration host machine through a refrigerant vapor pipeline, so that refrigeration cycle is completed.
5. The method for controlling the diversified integrated cooling system of the data center according to claim 4, wherein the basic cooling unit failure cooling mode is: when the refrigeration host of the basic cooling unit breaks down, the cooling water chilling unit, the cooling electric two-way regulating valve and the cooling pump are started to carry out cooling, the energy-saving electric switch valve and the energy-saving unit are closed, the electric two-way switch valve of the cold storage tank is opened, water in the cold storage tank is conveyed to each heat exchanger by the cooling pump through a water supply pipeline, each heat exchanger exchanges heat with a gas refrigerant returned from a steam pipe of the energy-saving and emergency cooling system, and the cold water is returned to the cold storage tank through a water return pipeline after being heated; the refrigerant is cooled into liquid refrigerant by each heat exchanger, flows to the liquid storage tank under the action of gravity, is pressurized by the fluorine pump and then is supplied to the energy-saving and emergency cooling evaporation coil of the indoor unit through the energy-saving and emergency cooling system liquid supply pipe, and the liquid refrigerant is evaporated into vapor and then returns to the heat exchanger through the energy-saving and emergency cooling system vapor pipe to complete the heat exchange cycle.
6. The method for controlling the diversified integrated cooling system of the data center according to claim 5, wherein the emergency cooling mode comprises: when the refrigeration host of the basic cooling unit loses power, the energy-saving and emergency controller powered by the UPS is adopted to close the cold-charging electric two-way valve, close the energy-saving electric two-way switch valve and open the cold-storage tank electric two-way switch valve, water in the cold-storage tank is conveyed to each heat exchanger by the cold supply pump through the water supply pipeline to exchange heat with a gas refrigerant returned from the energy-saving and emergency cold supply system steam pipe, and cold water is returned to the cold-storage tank through the water return pipeline after being heated to complete heat transfer; after being cooled into liquid refrigerant by the heat exchanger, the refrigerant flows to the liquid storage tank under the action of gravity, is pressurized by the fluorine pump and is supplied to the energy-saving and emergency cooling evaporation coil of the indoor unit through the emergency cooling system liquid supply pipe, and the liquid refrigerant is evaporated into vapor and then returns to the heat exchanger through the energy-saving and emergency cooling system vapor pipe to complete the heat exchange cycle.
7. The control method of the diversified integrated cooling system of the data center according to claim 6, further comprising a wet bulb temperature sensor (101) and a dry bulb temperature sensor (102) which are arranged outdoors; the basic cooling unit controller is respectively and electrically connected with the wet bulb temperature sensor and the dry bulb temperature sensor;
step 1: a standard outdoor wet bulb temperature interval is arranged in the controller of the basic cooling unit
The wet bulb temperature sensor detects the wet bulb temperature A; setting standard outdoor dry bulb temperature interval in controller
The dry bulb temperature sensor detects that the temperature of the wet bulb is B
Step 2: the basic unit cooling controller switches the cooling modes according to the wet bulb temperature A as follows:
(1) when the wet bulb temperature A is larger than or equal to A2, entering a basic unit cooling mode;
(2) when the wet bulb temperature A2 is more than A and is not less than A1, entering a partial natural cooling mode, namely wet cooling;
(3) when the wet bulb temperature A1 is more than A and B is more than or equal to B2, entering a full natural cooling mode, namely wet cooling;
(4) when the outdoor dry bulb temperature B1 is more than or equal to B, entering a full natural cooling mode, namely dry cooling; wherein B1 is less than B2;
(5) when any basic cooling unit refrigeration host fails, entering a basic cooling unit failure cooling mode;
(6) and when the basic cooling unit refrigeration host loses power, the emergency cooling mode is entered.
8. A control method suitable for the diversified integrated cooling system of the data center according to claim 6, comprising the following control steps:
a first communicating pipe and a second communicating pipe are arranged between the water supply pipe and the water return pipe, the first communicating pipe is provided with a differential pressure pipe transmitter (14), and the second communicating pipe is provided with a flow sensor (15) and an electric two-way regulating valve (16); a temperature sensor (103) is arranged in the cold storage tank; the pressure difference P is detected by the pressure difference pipe conveyer, the flow G is detected by the flow sensor, and the temperature E in the cold storage tank is detected by the temperature sensor; the basic cooling unit controller (30) is respectively and electrically connected with the differential pressure pipe conveyer, the flow sensor, the electric two-way regulating valve and the temperature sensor;
step 2: the energy-saving and emergency controller carries out the following control steps:
1) when P is more than or equal to P2, the energy-saving and emergency controller reduces the rotating speed of the cooling pump; when the pressure difference value P1 is more than or equal to P, the energy-saving and emergency controller increases the rotating speed of the cooling pump; wherein P1 is less than P2;
2) when G1 is larger than or equal to G, the opening of the electric two-way regulating valve is opened by the energy-saving and emergency controller, and when G is larger than or equal to G2, the opening of the electric two-way regulating valve is closed by the energy-saving and emergency controller; wherein G1 is less than G2;
3) and when the E value is more than or equal to the E2 value, the energy-saving and emergency controller starts the cold-filling pump and the cold-filling water chilling unit, and when the E1 value is more than or equal to the E value, the energy-saving and emergency controller closes the cold-filling pump and the cold-filling water chilling unit and keeps the electric valve in a closed state, wherein E1 is more than E2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911196364.0A CN111263562B (en) | 2019-11-28 | 2019-11-28 | Diversified integrated cooling system of data center and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911196364.0A CN111263562B (en) | 2019-11-28 | 2019-11-28 | Diversified integrated cooling system of data center and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111263562A CN111263562A (en) | 2020-06-09 |
| CN111263562B true CN111263562B (en) | 2021-10-26 |
Family
ID=70950912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911196364.0A Active CN111263562B (en) | 2019-11-28 | 2019-11-28 | Diversified integrated cooling system of data center and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111263562B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811116A (en) * | 2020-07-07 | 2020-10-23 | 北京丰联奥睿科技有限公司 | Configuration method of multi-connected air conditioning system |
| CN115076815B (en) * | 2022-06-27 | 2023-10-24 | 珠海格力电器股份有限公司 | Air conditioning system, data center and cooling method |
| CN117440670B (en) * | 2023-12-21 | 2024-03-29 | 常州博瑞电力自动化设备有限公司 | External cooling system and control method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102937038B (en) * | 2011-08-15 | 2016-02-17 | 北京天成山泉电子科技有限公司 | A kind of multistage recovery utilization system of LNG cold energy and using method thereof |
| CN207113100U (en) * | 2017-07-11 | 2018-03-16 | 福建省建筑设计研究院有限公司 | High-temperature refrigeration coupling accumulation of energy cold source air conditioning system based on independent temperature-humidity control |
| CN107355926A (en) * | 2017-07-11 | 2017-11-17 | 福建省建筑设计研究院 | High-temperature refrigeration coupling accumulation of energy cold source air conditioning system and its control method based on independent temperature-humidity control |
| CN207515299U (en) * | 2017-11-29 | 2018-06-19 | 郑州云海信息技术有限公司 | A kind of refrigeration system and air-conditioning system |
| CN207797285U (en) * | 2017-12-27 | 2018-08-31 | 深圳市艾特网能技术有限公司 | A kind of emergent refrigeration system of data center |
| CN108224631B (en) * | 2017-12-27 | 2020-09-22 | 深圳市艾特网能技术有限公司 | Data center emergency refrigeration system and control method thereof |
| CN209246298U (en) * | 2018-12-26 | 2019-08-13 | 大连裕德科技有限公司 | A kind of Multifunctional cold heat source system of Office building |
-
2019
- 2019-11-28 CN CN201911196364.0A patent/CN111263562B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111263562A (en) | 2020-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11867426B2 (en) | System and methods utilizing fluid coolers and chillers to perform in-series heat rejection and trim cooling | |
| CN107014016B (en) | Fluorine pump natural cooling evaporation type condensation water chiller and control method thereof | |
| CN111263562B (en) | Diversified integrated cooling system of data center and control method | |
| CN202546956U (en) | Air-conditioning energy saving system using natural cold source | |
| CN108224631B (en) | Data center emergency refrigeration system and control method thereof | |
| CN210197600U (en) | Secondary pump variable flow chilled water system with energy storage device | |
| CN104896641A (en) | Double-evaporator dynamic ice cold storage system | |
| CN108826820B (en) | Refrigeration method of multi-temperature control refrigeration house and refrigeration system of multi-temperature control refrigeration house | |
| CN105276733A (en) | Data computer room cooling system and cooling method thereof | |
| CN111059738A (en) | Heat recovery side control system of heat recovery centrifugal unit | |
| CN204730381U (en) | Double evaporators dynamic ice cold storage system | |
| CN210840466U (en) | Data center air cooling cold source natural cooling system | |
| CN108444005A (en) | Uninterrupted refrigeration system and its control method | |
| CN207350607U (en) | A kind of ice-storage air-conditioning structure | |
| CN108050719A (en) | A kind of Cooling System and its control method based on differential thermal calculation refrigerated medium pump ability | |
| CN212362256U (en) | Central water-cooling air conditioning system | |
| CN214757525U (en) | Data center air conditioning system capable of utilizing natural cold source all year round | |
| CN212253244U (en) | Air conditioning system | |
| CN206648225U (en) | A kind of cooling-water machine of separate modular | |
| CN207907403U (en) | Uninterrupted refrigeration system | |
| CN206207796U (en) | The cold water control system of multiple compressor reducers | |
| CN104634048A (en) | Circulating cooling water system | |
| CN106468465A (en) | Winter energy reclaims refrigeration system and its refrigerating method | |
| CN204963054U (en) | Refrigerating system was retrieved to energy winter | |
| CN114294737B (en) | Refrigeration system, control method and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |