CN217635991U - Ice storage central air conditioning energy-saving control system - Google Patents
Ice storage central air conditioning energy-saving control system Download PDFInfo
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- CN217635991U CN217635991U CN202221959860.4U CN202221959860U CN217635991U CN 217635991 U CN217635991 U CN 217635991U CN 202221959860 U CN202221959860 U CN 202221959860U CN 217635991 U CN217635991 U CN 217635991U
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/14—Thermal energy storage
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Abstract
The utility model discloses an ice cold-storage central air conditioning energy-saving control system, the system includes ice cold-storage host computer, ethylene glycol pump, cooling water pump, cooling tower fan, freezing secondary pump, data collection station, PLC controller and central controller, and the cooling water temperature sensor that intakes, the cooling water goes out water temperature sensor, the terminal indoor temperature sensor of refrigerated water temperature sensor, the refrigerated water temperature sensor that intakes, the refrigerated water goes out water temperature sensor and air conditioner all connects data collection station, and ice cold-storage host computer, ethylene glycol pump, cooling water pump, cooling tower fan and freezing secondary pump all are connected with the PLC controller, central controller is all connected to data collection station, PLC controller. The operation of each unit can be accurately controlled according to the temperature of cooling water inlet and outlet water, the temperature of chilled water inlet and outlet water and the required terminal temperature, and the energy consumption is effectively reduced.
Description
Technical Field
The utility model relates to an ice cold-storage technical field, concretely relates to ice cold-storage central air conditioning energy-saving control system.
Background
The ice storage is one of the development directions of important energy-saving means in the new century, is a new technology which benefits mankind and has wide development prospect, has good social effect and economic benefit, and is increasingly important in world energy and environmental protection at present, the ice storage is used as the peak load shifting and valley filling of the electric power in China, the power load rate of a power grid is improved, the comprehensive benefit of electric power investment is improved, and CO is reduced 2 And the discharge amount of sulfide is an important means for protecting the environment.
The ice cold storage technology is a complete set of technology which utilizes the off-peak time of a power grid at night, utilizes low-price electricity to make ice and store cold energy, melts ice at the peak time of electricity utilization in the daytime, supplies cold with a refrigerating unit together, and releases the stored ice cold energy to meet the peak load requirement of an air conditioner at the peak time of the air conditioner in the daytime. The existing ice storage system does not monitor the temperature of the freezing water and the temperature of the cooling water in and out, and cannot accurately control the start and stop of the equipment according to the temperature of the freezing water and the temperature of the cooling water in and out and the actual cold supply demand of the tail end, so that the energy consumption of the existing ice storage system is high, and the energy-saving efficiency is poor.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model provides an ice cold-storage central air conditioning energy-saving control system to solve the unable accurate control that opens the stop to equipment according to freezing water and cooling water temperature and terminal actual cooling demand realization that current ice cold-storage system exists, the energy consumption is high, energy-conserving not good problem of efficiency.
In order to achieve the above object, the present invention provides the following technical solutions: an energy-saving control system of an ice cold storage central air conditioner comprises an ice cold storage host, a glycol pump, a cooling water pump, a cooling tower fan, a freezing secondary pump, a data collector, a PLC (programmable logic controller) and a central controller;
the ice cold storage host is connected with a condenser and an evaporator through a refrigerant pipeline, the condenser is connected with a cooling water circulation pipeline, the cooling water circulation pipeline comprises a cooling tower fan and a cooling water pump which are connected, a cooling water inlet temperature sensor is arranged on a connecting pipeline of the condenser and the cooling tower fan, a cooling water outlet temperature sensor is arranged on a connecting pipeline of the cooling water pump and the cooling tower fan, the evaporator is connected with a refrigerant circulation pipeline, the refrigerant circulation pipeline comprises a plate heat exchanger and a glycol pump which are connected, the plate heat exchanger is connected with a chilled water circulation pipeline, the chilled water circulation pipeline comprises an air conditioner terminal device and a secondary freezing pump, a chilled water outlet temperature sensor is arranged on a connecting pipeline of the plate heat exchanger and the air conditioner terminal device, and a chilled water inlet temperature sensor is arranged on a connecting pipeline of the plate heat exchanger and the secondary freezing pump;
the cooling water temperature sensor that intakes, the cooling water goes out water temperature sensor, the refrigerated water temperature sensor that intakes, the refrigerated water goes out water temperature sensor and the terminal indoor temperature sensor of air conditioner all connects data collection station, ice cold-storage host computer, ethylene glycol pump, cooling water pump, cooling tower fan and freezing secondary pump all are connected with the PLC controller, central controller is all connected to data collection station, PLC controller.
Further, the system further comprises a cooling water pump frequency converter and a freezing secondary pump frequency converter, wherein the cooling water pump is connected with the cooling water pump frequency converter, the cooling water pump frequency converter is connected with the PLC, the freezing secondary pump is connected with the freezing secondary pump frequency converter, and the freezing secondary pump frequency converter is connected with the PLC.
Further, the system further comprises a cooling water flow sensor and a chilled water flow sensor, wherein the cooling water flow sensor is arranged on a connecting pipeline of a cooling water pump and a condenser, the chilled water flow sensor is arranged on a connecting pipeline of the plate heat exchanger and an air conditioner terminal device, and the cooling water flow sensor and the chilled water flow sensor are connected with a data acquisition unit.
Further, the system also comprises an outdoor temperature sensor connected with the data acquisition unit.
Further, the system also comprises an outdoor illumination sensor connected with the data collector.
Furthermore, the system also comprises an ice storage tank, and the secondary refrigerant circulating pipeline passes through the ice storage tank to cool water in the ice storage tank so as to realize ice making.
Furthermore, an expansion valve is connected between the condenser and the evaporator.
The utility model has the advantages of as follows:
the utility model provides a pair of ice cold-storage central air conditioning energy-saving control system, the system includes ice cold-storage host computer, ethylene glycol pump, cooling water pump, cooling tower fan, freezing secondary pump, data collection station, PLC controller and central controller, and the cooling water temperature sensor that intakes, the cooling water goes out water temperature sensor, the freezing water temperature sensor that intakes, the freezing water goes out water temperature sensor and air conditioner end equipment and all connects data collection station, and ice cold-storage host computer, ethylene glycol pump, cooling water pump, cooling tower fan and freezing secondary pump all are connected with the PLC controller, central controller is all connected to data collection station, PLC controller. The operation of each unit can be accurately controlled according to the temperature of cooling water inlet and outlet water, the temperature of chilled water inlet and outlet water and the required terminal temperature, and the energy consumption is effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
Fig. 1 is a schematic structural diagram of an energy-saving control system for an ice storage central air conditioner provided in embodiment 1 of the present invention.
In the figure: 1-an ice cold accumulation host machine; a 2-glycol pump; 3-a cooling water pump; 4-cooling tower fan; 5-a chilled water flow sensor; 6-a cooling water flow sensor; 7-a chilled water outlet temperature sensor; 8-chilled water inlet temperature sensor; 9-cooling tower water flow balance valve; 10-cooling water inlet temperature sensor; 11-cooling water outlet temperature sensor; 12-a cryogenic secondary pump transducer; 13-cooling water pump frequency converter; 14-a PLC controller; 15-a central controller; 16-a data collector; 18-a light sensor; 17-outdoor temperature sensor; 19-a cryogenic secondary pump; 20-an ice storage tank; 21-a condenser; 22-an evaporator; 23-an expansion valve; 24-plate heat exchangers; 25-air conditioning end equipment.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
As shown in fig. 1, the present embodiment proposes an energy-saving control system for an ice storage central air conditioner, which includes an ice storage host 1, an ethylene glycol pump 2, a cooling water pump 3, a cooling tower fan 4, a freezing secondary pump 19, a data collector 16, a PLC controller 14, and a central controller 15.
The ice thermal storage main unit 1 is connected with a condenser 21 and an evaporator 22 through a refrigerant pipeline, and an expansion valve 23 is connected between the condenser 21 and the evaporator 22. Condenser 21 connects the cooling water circulation pipeline, the cooling water circulation pipeline is including cooling tower fan 4 and cooling water pump 3 that are connected, be provided with cooling water temperature sensor 10 that intakes on condenser 21 and the connecting pipeline of cooling tower fan 4, be provided with cooling water temperature sensor 11 on cooling water pump 3 and the connecting pipeline of cooling tower fan 4, evaporimeter 22 is connected and is had the refrigerant circulation pipeline, the refrigerant circulation pipeline is including plate heat exchanger 24 and the ethylene glycol pump 2 that are connected, plate heat exchanger 24 is connected with the refrigerated water circulation pipeline, the refrigerated water circulation pipeline includes air conditioner end equipment 25 and freezing secondary pump 19, be provided with refrigerated water temperature sensor 7 on the connecting pipeline of plate heat exchanger 24 and air conditioner end equipment 25, be provided with refrigerated water temperature sensor 8 on the connecting pipeline of plate heat exchanger 24 and freezing secondary pump 19.
The cooling water inlet temperature sensor 10, the cooling water outlet temperature sensor 11, the chilled water inlet temperature sensor 8, the chilled water outlet temperature sensor 7 and the indoor temperature sensor at the tail end of the air conditioner are all connected with the data collector 16, the ice cold accumulation host 1, the glycol pump 2, the cooling water pump 3, the cooling tower fan 4 and the freezing secondary pump 19 are all connected with the PLC 14, and the data collector 16 and the PLC 14 are all connected with the central controller 15.
Further, the system also comprises a cooling water pump frequency converter 13 and a freezing secondary pump frequency converter 12, wherein the cooling water pump 3 is connected with the cooling water pump frequency converter 13, the cooling water pump frequency converter 13 is connected with a PLC (programmable logic controller) 14, the freezing secondary pump 19 is connected with the freezing secondary pump frequency converter 12, and the freezing secondary pump frequency converter 12 is connected with the PLC 14.
Furthermore, the system also comprises a cooling water flow sensor 6 and a chilled water flow sensor 5, wherein the cooling water flow sensor 6 is arranged on a connecting pipeline between the cooling water pump 3 and the condenser 21, the chilled water flow sensor 5 is arranged on a connecting pipeline between the plate heat exchanger 24 and the air conditioner terminal equipment 25, and the cooling water flow sensor 6 and the chilled water flow sensor 5 are both connected with the data collector 16.
Further, the system also includes an outdoor temperature sensor 17 connected to the data collector 16. The system also includes an outdoor light sensor 18 connected to the data collector 16.
Further, the system also comprises an ice storage tank 20, and the refrigerating medium circulation pipeline passes through the ice storage tank 20 to cool the water in the ice storage tank 20 so as to make ice.
When the refrigerating unit operates, secondary refrigerant (glycol solution) flows through the ice storage main machine 1 to be cooled, and then is conveyed to the ice storage tank to cool water in the ice storage tank 20, the temperature is generally reduced to about minus 3 ℃, meanwhile, the other side pipeline of the ice storage tank conveys glycol out, and the glycol flows back into the main machine through the glycol pump 2, so that the low-temperature glycol circularly cools the water in the ice storage tank. On the other hand, the glycol liquid cooled by the main machine flows through the ice melting plate type heat exchanger 24 to convey cold energy to the tail end, and the secondary refrigerant flows back to the refrigerating unit through the secondary freezing pump 19.
When a plurality of ice storage main machines 1 exist in the system, the number of the ice storage main machines 1 which are put into operation is controlled by time. The operation of the ice storage host machine 1 of the system is started in sequence, and the ice storage host machine 1 with the minimum operation time is started. When a plurality of machines run simultaneously, the ice cold accumulation host machine 1 automatically searches for the best efficiency to start the machine.
The ethylene glycol pumps 2 are started and correspond to the ice storage main machine 1 one by one, and before the ice storage main machine 1 is started, the corresponding ethylene glycol pumps 2 are started firstly. Several ice cold-storage host machines 1 are started, and several ethylene glycol pumps 2 are correspondingly started. The stop of the glycol pump 2 during ice storage at night is determined by the state of the ice cold storage host machine 1, and when the ice cold storage host machine 1 is in the starting state and the standby state, the glycol pump 2 is operated all the time and is not stopped. Only when the ice storage host 1 is in a shutdown state, the corresponding glycol pump 2 stops running. And starting the ethylene glycol pump 2 for ice melting and cold supply when cold supply is carried out at the tail end in the daytime, and starting or closing the ethylene glycol pump 2 according to the cold supply requirement at the tail end.
The opening or closing time of the secondary freezing pump 19 is set according to the end cold supply requirement, the rotating speed of the secondary freezing pump 19 is adjusted according to the temperature of inlet and outlet water of the chilled water, and the rotating speed is adjusted from 50% to 100%. The optimal effect of the outlet water temperature of the chilled water is achieved by adjusting the rotating speed of the secondary freezing pump 19, and the energy consumption is reduced. The control of the cooling water pump 3 corresponds to the start and stop of the ice storage host 1, when the ice storage host 1 is started, the corresponding cooling water pump 3 is started, and when the ice storage host 1 is stopped, the corresponding cooling water pump 3 is stopped.
The rotating speed of the cooling water pump 3 is adjusted by the temperature of inlet and outlet water of the cooling water, the temperature difference of the inlet and outlet water is set according to the use condition, and the rotating speed of the water pump is adjusted from 50-100%. The cooling water pump 3 adjusts the rotating speed of the water pump through the temperature difference of the inlet water and the return water of the pipeline so as to achieve the best effect of the temperature of the outlet water of the cooling water, and thus, the energy consumption of the cooling water pump 3 is greatly reduced.
The cooling tower fan 4 starts and stops to be linked with the cooling water pump 3, when the cooling water pump 3 is started, the cooling tower fan 4 starts to be started, and when the cooling water pump 3 stops, the cooling tower also correspondingly stops. The adjustment and control of the cooling tower fan 4 are realized by the temperature of cooling water inlet and outlet water. When the temperature of the cooling water outlet reaches a certain set value, the cooling tower fan 4 is started, and then the temperature of the cooling water outlet is increased, so that the cooling tower operation fan can be correspondingly increased; when the outdoor temperature is reduced, the temperature of the cooling water outlet is reduced, the operation fans of the cooling tower are correspondingly reduced, and until the temperature of the cooling water outlet is lower than a set value, the operation of all the fans 4 of the cooling tower is stopped. In addition, when the outlet temperature of the cooling water is higher than the set temperature value, all the cooling tower fans 4 are turned on.
Another major task of energy-saving control of cooling towers is to keep the cooling water flow in balance, and the cooling tower can exert the maximum effect only when the cooling water flow is balanced. The control of the cooling water flow balance is mainly completed by a cooling tower water flow balance valve 9. The water flow balance valve can automatically adjust the flow according to the set pressure difference value and the opening state of the cooling tower, so that the balance of the water flow is guaranteed, and the water flow can preferentially pass through the cooling tower opened by the fan.
Through the setting of each sensor and controller, the quantity regulation of host computer and auxiliary engine is realized through freezing water and cooling water business turn over water temperature value and user's required temperature joint regulation. When the outlet water temperature of the chilled water reaches a set value and the temperature required by the tail end meets the temperature requirement, the main machine and the auxiliary machine start to correspondingly make energy-saving regulation reaction; and when the temperature of the outlet water of the chilled water rises to a set value and the temperature required by the tail end does not meet the requirement, the operation state of the unit and the auxiliary machine is readjusted. Effectively reducing energy consumption.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of this invention without departing from the spirit thereof.
Claims (8)
1. An energy-saving control system of an ice cold storage central air conditioner is characterized by comprising an ice cold storage host, a glycol pump, a cooling water pump, a cooling tower fan, a freezing secondary pump, a data collector, a PLC (programmable logic controller) and a central controller;
the ice cold storage host is connected with a condenser and an evaporator through a refrigerant pipeline, the condenser is connected with a cooling water circulation pipeline, the cooling water circulation pipeline comprises a cooling tower fan and a cooling water pump which are connected, a cooling water inlet temperature sensor is arranged on a connecting pipeline of the condenser and the cooling tower fan, a cooling water outlet temperature sensor is arranged on a connecting pipeline of the cooling water pump and the cooling tower fan, the evaporator is connected with a refrigerant circulation pipeline, the refrigerant circulation pipeline comprises a plate heat exchanger and a glycol pump which are connected, the plate heat exchanger is connected with a chilled water circulation pipeline, the chilled water circulation pipeline comprises an air conditioner terminal device and a secondary freezing pump, a chilled water outlet temperature sensor is arranged on a connecting pipeline of the plate heat exchanger and the air conditioner terminal device, and a chilled water inlet temperature sensor is arranged on a connecting pipeline of the plate heat exchanger and the secondary freezing pump;
the cooling water temperature sensor that intakes, the cooling water goes out water temperature sensor, the refrigerated water temperature sensor that intakes, the refrigerated water goes out water temperature sensor and the terminal indoor temperature sensor of air conditioner all connects data collection station, ice cold-storage host computer, ethylene glycol pump, cooling water pump, cooling tower fan and freezing secondary pump all are connected with the PLC controller, central controller is all connected to data collection station, PLC controller.
2. The energy-saving control system for the ice storage central air conditioner according to claim 1, further comprising a cooling water pump frequency converter and a freezing secondary pump frequency converter, wherein the cooling water pump is connected with the cooling water pump frequency converter, the cooling water pump frequency converter is connected with a PLC controller, the freezing secondary pump is connected with the freezing secondary pump frequency converter, and the freezing secondary pump frequency converter is connected with the PLC controller.
3. The energy-saving control system for the ice storage central air conditioner according to claim 1, characterized in that the system further comprises a cooling water flow sensor and a chilled water flow sensor, wherein the cooling water flow sensor is arranged on a connecting pipeline of a cooling water pump and a condenser, the chilled water flow sensor is arranged on a connecting pipeline of a plate heat exchanger and an air conditioning terminal device, and the cooling water flow sensor and the chilled water flow sensor are both connected with a data collector.
4. The energy-saving control system for the ice-storage central air-conditioning as claimed in claim 1, wherein the system further comprises an outdoor temperature sensor connected with the data collector.
5. The energy-saving control system for the ice storage central air conditioner according to claim 1, wherein the system further comprises an outdoor illumination sensor connected with the data collector.
6. The energy-saving control system for the ice-storage central air-conditioning as claimed in claim 1, wherein the system further comprises an ice storage tank, and the coolant circulation pipeline passes through the ice storage tank to cool water in the ice storage tank to make ice.
7. The energy-saving control system for the ice storage central air conditioner as claimed in claim 1, wherein the cooling tower fan is connected with a water flow balancing valve, and the water flow balancing valve is connected with a PLC controller.
8. The energy-saving control system for the ice-storage central air-conditioning as claimed in claim 1, wherein an expansion valve is connected between the condenser and the evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221959860.4U CN217635991U (en) | 2022-07-27 | 2022-07-27 | Ice storage central air conditioning energy-saving control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221959860.4U CN217635991U (en) | 2022-07-27 | 2022-07-27 | Ice storage central air conditioning energy-saving control system |
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| CN217635991U true CN217635991U (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221959860.4U Active CN217635991U (en) | 2022-07-27 | 2022-07-27 | Ice storage central air conditioning energy-saving control system |
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| CN (1) | CN217635991U (en) |
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- 2022-07-27 CN CN202221959860.4U patent/CN217635991U/en active Active
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