CN211119639U - Device for extracting heat of circulating cooling water and preheating domestic hot water - Google Patents
Device for extracting heat of circulating cooling water and preheating domestic hot water Download PDFInfo
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- CN211119639U CN211119639U CN201920934574.4U CN201920934574U CN211119639U CN 211119639 U CN211119639 U CN 211119639U CN 201920934574 U CN201920934574 U CN 201920934574U CN 211119639 U CN211119639 U CN 211119639U
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Abstract
The utility model provides a draw recirculated cooling water heat and preheat hot water's of life device, include: the water chilling unit is internally provided with a condenser and an evaporator and is connected with an inlet of the circulating cooling water pump through a pipeline; the system comprises a preheating circulating system, wherein one side of an inlet of the preheating circulating system is connected with an outlet of a water chilling unit through a pipeline, cooling water at 37 ℃ flows inside the pipeline to be discharged, the other side of the inlet of the preheating system is connected with a circulating cooling water pump through a pipeline, water at 25-32 ℃ flows inside the pipeline, the temperature of the discharged water of the unit cooling water is higher than that of tap water, and the temperature of the tap water is increased to 20-25 ℃ from about 15 ℃; the domestic hot water heating device is characterized by further comprising domestic hot water heating equipment, wherein the preheated water at 20-25 ℃ output from the preheating circulating system is connected with the heater through a pipeline, the device is free of power and automatically circulates, the circulating water supply and return water pipeline pressure difference is utilized for automatic circulation, and the device is free of control due to the fact that overheating problems do not exist.
Description
Technical Field
The utility model relates to a heat energy circulation field, concretely relates to utilize building central air conditioning system cooling circulating water to preheat life hydrothermal equipment.
Background
Referring to fig. 1, a cooling circulation water system of a central air-conditioning water chiller 10 in a building is composed of a circulation water pump 11, a circulation water pipeline, a cooling tower 12 and the like, and absorbs heat in air in the building and emits the heat to outdoor atmosphere through the cooling circulation water system, so that an air-conditioning refrigeration effect is achieved. The inlet water temperature of the cooling water of the unit is generally 32 ℃, the water temperature is raised to 37 ℃ after the heat is absorbed in the unit, then the water is cooled to 32 ℃ after being cooled by a fan of a cooling tower through a circulating water pump, a circulating pipeline, the cooling tower and the like, and then the water returns to the unit, and the circulation work is carried out.
Referring to fig. 2, the domestic hot water heating method is to heat tap water in a heat exchanger (heater 20) by a heating medium (high-temperature hot water or steam) to raise the temperature of cold water (15 ℃) to a design temperature (55-60 ℃).
The above 2 systems are conventional operation modes which operate independently, but in a building with a centralized air-conditioning system and a centralized domestic hot water system, energy can not be conducted and reused, so that certain energy consumption is caused. Therefore, it is necessary to preheat domestic hot water by using the heat of the circulating cooling water of the air-conditioning water chilling unit through a certain technical means, absorb part of the heat of the circulating water system, reduce the heat dissipation capacity of the cooling tower, improve the water inlet basic water temperature of the heater, and reduce the consumption of the heating medium, so as to achieve the purpose of energy-saving operation.
Disclosure of Invention
In order to overcome the above-mentioned problem that prior art exists, the utility model provides an extract recirculated cooling water heat and preheat hot water's of life device utilizes air conditioner cooling water set recirculated cooling water's heat, preheats life hot water, absorbs part recirculated water system's heat, reduces the heat dissipation capacity of cooling tower, improves the basic temperature of intaking of heater, reduces the heat medium and consumes to reach energy-conserving operation, reduce building running cost's purpose.
An object of the utility model is to provide an extract recirculated cooling water heat and preheat hot water in life's device, include:
the water chilling unit is internally provided with a condenser and an evaporator and is connected with an inlet of the circulating cooling water pump through a pipeline;
preheating the circulation system, preheating circulation system's entry one side pass through the pipeline with the exit linkage of cooling water set, the inside cooling water that circulates 37 degrees centigrade of pipeline goes out water, preheating system's entry opposite side and passing through the pipeline and be connected with recirculated cooling water pump, the inside water that circulates 25-32 degrees centigrade of pipeline utilizes unit cooling water to go out water temperature and is higher than the running water temperature, preheating circulating equipment, improving the temperature of running water to 20 ~ 25 by about 15 ℃.
Preferably, the method further comprises the following steps: domestic hot water heating equipment, including the heater, follow 20-25 degrees centigrade of preheating water of output in the circulation system of preheating passes through the pipeline connection the heater reaches the purpose that improves the basic temperature of heating equipment.
Preferably, outlet pipelines of the water chilling unit are connected with pressure gauges, and the pressure tests are carried out to ensure the working safety of the system.
Preferably, the circulating cooling water pumps are provided with two inlets which are connected with the water chilling unit, the outlets of which are respectively connected with the preheating circulating system and the cooling tower set, the cooling tower set is provided with a plurality of cooling towers, and the outlets of the cooling towers are connected with a tap water pipe through pipelines, so that the cooling towers can replenish water.
Preferably, the cooling tower set is arranged on a roof.
Preferably, a water supply line is arranged below the heating circulation system, so that cold water at 15 ℃ is supplied.
Preferably, the three pipelines are arranged on the outer side of the heater and respectively comprise a domestic hot water supply pipeline, a heating medium inlet pipeline and a heating medium outlet pipeline, the domestic hot water supply pipeline supplies 55-60 ℃ domestic hot water, the heating medium inlet pipeline supplies 97 ℃ hot water, and the heating medium outlet pipeline discharges 70 ℃ hot water.
Preferably, the device can automatically circulate without power by utilizing the pressure difference of circulating water supply and return pipelines.
Preferably, the device is free from overheating problems and thus free from control.
Preferably, the water chilling unit is replaced by a solar heat collector, and hot water generated by the solar heat collector preheats domestic hot water through a heating circulation system.
The utility model discloses compare prior art's beneficial effect:
due to the adoption of the mode, the basic water temperature of tap water is improved, the consumption of the heating medium is reduced when the heating medium is used for heating, and the purpose of reducing the operation cost is achieved.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. The objects and features of the present invention will become more apparent in view of the following description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a cooling circulating water system of a central air-conditioning water chiller in a building according to the prior art;
FIG. 2 is a schematic diagram of a system for heating tap water in a heat exchanger by a heating medium according to a domestic hot water heating mode of the prior art;
fig. 3 is a schematic view of an apparatus for preheating domestic hot water by extracting heat from recirculated cooling water according to an embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, which are not intended to limit the scope of the invention.
Referring to fig. 3, in the first embodiment:
the utility model provides an extract recirculated cooling water heat and preheat hot water's of life device, utilizes the heat of air conditioner cooling water set recirculated cooling water, preheats hot water of life, absorbs part circulating water system's heat, reduces the heat dissipation capacity of cooling tower, improves the basic temperature of intaking of heater, reduces the heat medium and consumes to reach energy-conserving operation, reduce building running cost's purpose. The method comprises the following steps: a water chilling unit 30, in which a condenser 31 and an evaporator 32 are arranged, and the water chilling unit is connected with an inlet of a circulating cooling water pump through a pipeline; preheating a circulating system, wherein one side of an inlet of the preheating circulating system is connected with an outlet of a water chilling unit through a pipeline, cooling water with the temperature of 37 ℃ flows through the inside of the pipeline, the other side of the inlet of the preheating system is connected with a circulating cooling water pump 33 through a pipeline, water with the temperature of 25-32 ℃ flows through the inside of the pipeline, a set of circulating preheating equipment 34 is arranged by utilizing the phenomenon that the outlet water temperature of unit cooling water is higher than the temperature of tap water, and the temperature of the tap water is increased to 20-25 ℃ from about 15 ℃; domestic hot water heating equipment comprises a heater, wherein preheated water at 20-25 ℃ output from a preheating circulating system is connected with the heater 35 through a pipeline, so that the aim of improving the basic water temperature of the heating equipment is fulfilled, and the aim is specifically seen in a dotted line frame of 'figure 3'. The outlet pipelines of the water chilling unit are all connected with a pressure gauge, and the pressure test is carried out to ensure the working safety of the system. The circulating cooling water pumps are provided with two circulating cooling water pumps, the inlet sides of the circulating cooling water pumps are connected with the water chilling unit, and the outlet sides of the circulating cooling water pumps are respectively connected with the preheating circulating system and the cooling tower set. The cooling tower set 36 has a plurality of cooling towers, and the outlets of the cooling towers are connected with tap water pipes through pipelines, so that the cooling towers can be replenished with water. Typically, the cooling tower bank is disposed on a roof. A water supply line is provided below the heating cycle system to supply cold water at 15 degrees Celsius. The three pipelines are arranged on the outer side of the heater and respectively comprise a domestic hot water supply pipeline, a heating medium inlet pipeline and a heating medium outlet pipeline, the domestic hot water supply pipeline supplies 55-60 ℃ domestic hot water, the heating medium inlet pipeline supplies 97 ℃ hot water, and the heating medium outlet pipeline discharges 70 ℃ hot water. The device can automatically circulate without power, and automatically circulate by utilizing the pressure difference of 0.07MPa of a circulating water supply pipeline and a circulating water return pipeline. The device is free from control, and because the medium temperature is lower, the overheating problem does not exist, and the device can be free from control in operation.
The scheme of the first embodiment comprises the following steps:
(1) the tap water is preheated by utilizing the temperature difference between the outlet water temperature of the cooling water of the water chilling unit and the temperature of the tap water.
(2) The preheated tap water enters the heater again, so that the purpose of increasing the water inlet temperature of the heater is achieved.
(3) The power-free automatic circulation utilizes the pressure difference (about 0.07MPa) of a circulating water supply pipeline and a circulating water return pipeline to realize automatic circulation.
(4) Control-free: because the medium temperature in the medium is lower, the overheating problem does not exist, and the control in the operation can be avoided.
Example two: the water chilling unit is replaced by a solar heat collector, and hot water generated by the solar heat collector preheats domestic hot water through a heating circulating system.
Due to the fact that the basic water temperature of tap water is improved through the first embodiment and the second embodiment, consumption of the heat medium is reduced when the heat medium is used for heating, and the purpose of reducing operation cost is achieved. The heat of 4138.7kJ can be saved by increasing the basic water temperature of 1 ℃ every time when 1m3 tap water is heated, and by adopting the system, the heat of 41387kJ can be saved by heating 1m3 tap water when the basic water temperature of 10 ℃ is increased on average, and 11.5 ℃ electricity can be saved compared with the energy that the basic water temperature of 11 ℃ is saved.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the above embodiments are only applicable to help understand the principles of the embodiments of the present invention; meanwhile, a person skilled in the art can change the embodiments and the application ranges according to the embodiments of the present invention, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. An apparatus for extracting heat of circulating cooling water to preheat domestic hot water, comprising:
the water chilling unit is internally provided with a condenser and an evaporator and is connected with an inlet of the circulating cooling water pump through a pipeline;
preheating the circulation system, preheating circulation system's entry one side pass through the pipeline with the exit linkage of cooling water set, the inside cooling water that circulates 37 degrees centigrade of pipeline goes out water, preheating system's entry opposite side and passing through the pipeline and be connected with recirculated cooling water pump, the inside water that circulates 25-32 degrees centigrade of pipeline utilizes unit cooling water to go out water temperature and is higher than the running water temperature, preheating circulating equipment, improving the temperature of running water to 20 ~ 25 by about 15 ℃.
2. The apparatus for extracting heat from circulating cooling water to preheat domestic hot water as claimed in claim 1, further comprising domestic hot water heating device including a heater, wherein the preheated water of 20-25 ℃ outputted from the preheating circulation system is connected to the heater via pipeline to increase basic water temperature of the heating device.
3. The device for extracting the heat of the circulating cooling water and preheating the domestic hot water as claimed in claim 1, wherein outlet pipelines of the water chilling unit are connected with pressure gauges, and a pressure test is performed to ensure the working safety of the system.
4. The apparatus for preheating domestic hot water by extracting heat from circulated cooling water as claimed in claim 1, wherein the circulated cooling water pump has two inlets connected to the water chiller and outlets connected to the preheating circulation system and the cooling tower set, respectively, the cooling tower set has a plurality of cooling towers, and outlets of the cooling towers are connected to tap water pipes through pipelines, so as to replenish water to the cooling towers.
5. The apparatus for extracting heat from circulated cooling water to preheat domestic hot water as claimed in claim 4, wherein the cooling tower assembly is installed on a roof.
6. The apparatus for preheating domestic hot water by extracting heat from circulated cooling water as claimed in claim 1, wherein a water supply line is provided below the preheating circulation system so as to supply cold water of 15 ℃.
7. The apparatus for preheating domestic hot water by extracting heat from circulated cooling water as claimed in claim 2, wherein three lines are provided outside the heater, respectively, a domestic hot water supply line for supplying domestic hot water at 55-60 degrees celsius, a heating medium inlet line for supplying 97 degrees celsius, and a heating medium outlet line for discharging 70 degrees celsius hot water.
8. The apparatus as claimed in claim 1, wherein the apparatus is capable of automatic circulation without power by utilizing pressure difference between the supply and return pipes of the circulating water.
9. The apparatus for extracting heat from circulated cooling water to preheat domestic hot water as claimed in claim 1, wherein the apparatus is free from overheating problems and thus free from control.
10. The device for extracting heat from circulating cooling water to preheat domestic hot water according to claim 1, wherein the chiller is replaced by a solar heat collector, and hot water generated by the solar heat collector is preheated by the heating circulation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920934574.4U CN211119639U (en) | 2019-06-20 | 2019-06-20 | Device for extracting heat of circulating cooling water and preheating domestic hot water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920934574.4U CN211119639U (en) | 2019-06-20 | 2019-06-20 | Device for extracting heat of circulating cooling water and preheating domestic hot water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211119639U true CN211119639U (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920934574.4U Active CN211119639U (en) | 2019-06-20 | 2019-06-20 | Device for extracting heat of circulating cooling water and preheating domestic hot water |
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| Country | Link |
|---|---|
| CN (1) | CN211119639U (en) |
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2019
- 2019-06-20 CN CN201920934574.4U patent/CN211119639U/en active Active
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