CN217330049U - Cooling system based on regional cooling - Google Patents
Cooling system based on regional cooling Download PDFInfo
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- CN217330049U CN217330049U CN202220552081.6U CN202220552081U CN217330049U CN 217330049 U CN217330049 U CN 217330049U CN 202220552081 U CN202220552081 U CN 202220552081U CN 217330049 U CN217330049 U CN 217330049U
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Abstract
The utility model discloses a cooling system based on regional cooling, including cooling circulation unit and cooling water circulation unit, wherein, cooling circulation unit includes: the switchable cooling loop is formed by at least one of the first-stage cooling mechanism, the second-stage cooling mechanism and the third-stage cooling mechanism and a user, and refrigerant channels of the second-stage cooling mechanism and the third-stage cooling mechanism are communicated with the double-working-condition refrigerating unit respectively to form loops; the cooling water circulation unit includes: the cooling tower cluster in summer and the cooling tower cluster in winter form a loop with the cooling water channel of the primary cooling mechanism, and the cooling tower cluster in winter forms a loop with the cooling water channel of the dual-working-condition refrigerating unit. The utility model discloses utilize multistage cooling mechanism's switching, cooperation cooling tower cluster in summer and the use of cooling tower cluster in different cooling circuit respectively in winter realize regional cooling system in the low energy consumption operation of energy station cooling system under different periods and different season operating modes, realize the high-efficient operational mode of safety and stability.
Description
Technical Field
The utility model relates to a cooling system based on regional cooling, concretely relates to low energy consumption cooling system for regional cooling system belongs to cooling equipment technical field.
Background
In recent years, air conditioning systems for public buildings have been popularized nationwide, built-in small self-cooling equipment for single building buildings has become a powerful force in the industry, and large-scale regional cooling is proposed due to low efficiency, excessive energy consumption and high operation and management cost of small units. In addition to the various parameters of the unit itself, the cooling system of the district cooling system is also an extremely important part in order to achieve the rated operation of the refrigerating unit. The existing water-cooling central air-conditioning system and cooling tower system for industrial circulation are basically cooling towers selected according to the maximum load of a unit, the working conditions of operation in different time periods and different seasons are not considered, and the cooling towers are all opened in the operation process of the unit, so that the energy consumption is high.
For solving the energy consumption problem of cooling system, among the prior art, utility model patent that publication number is CN211551907U discloses a regional cooling system that can give suitable cooling mode according to different load demands, and the system includes basic load refrigerating unit, duplex condition heat exchanger, cold-storage equipment, ice-storage heat exchanger etc.. When the system is used, the characteristics of the double-working-condition refrigerating unit can be utilized, the effect of the base load refrigerating unit is combined, the refrigerating output mode is dynamically switched according to the actual load capacity of a cold supply area, when the load is low, cold supply can be completed through the ice storage device, the load is gradually increased, the base load refrigerating unit and the double-working-condition refrigerating unit can be considered to be added for matching cold supply, the energy consumption can be effectively reduced, and the cold supply efficiency is improved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cooling system based on regional cooling utilizes the switching of multistage cooling body, and cooperation cooling tower cluster in summer and the use of cooling tower cluster in different cooling circuit respectively in winter realize regional cooling system energy station cooling system's low energy consumption operation under different periods and different season operating modes, realize the high-efficient operational mode of safety and stability.
The utility model discloses a following technical scheme realizes: a cooling system based on district cooling, comprising a cooling circulation unit and a cooling water circulation unit, wherein the cooling circulation unit comprises: the switchable cooling loop is formed by at least one of the first-stage cooling mechanism, the second-stage cooling mechanism and the third-stage cooling mechanism and a user, and refrigerant channels of the second-stage cooling mechanism and the third-stage cooling mechanism are communicated with the double-working-condition refrigerating unit respectively to form loops;
the cooling water circulation unit includes: the cooling tower cluster in summer and the cooling tower cluster in winter form a loop with the cooling water channel of the primary cooling mechanism, and the cooling tower cluster in winter forms a loop with the cooling water channel of the dual-working-condition refrigerating unit.
The primary cooling mechanism is a base cold carrier, the secondary cooling mechanism is a plate heat exchanger, and the tertiary cooling mechanism is an ice storage tank.
The cooling circuit includes: the three-stage cooling loop consists of the base cold carrier, the plate heat exchanger, the ice storage tank and a user which are sequentially communicated; a secondary cooling loop consisting of the base load cooler, the ice storage tank and the user which are sequentially communicated; a primary cooling loop formed by the base load cooler and the user; the ice storage pool and a user form an ice block cooling loop, and the cooling loop is switched through a pipeline and a valve.
The summer cooling tower cluster and the winter cooling tower cluster are communicated through a bypass pipe to form a loop, and a valve is arranged on the bypass pipe.
The summer cooling tower cluster is four conventional cross-flow type cooling towers arranged in parallel.
The winter tower cluster is four cross-flow type cooling towers which are arranged in parallel and provided with heating systems.
The heating system comprises a primary heater and a secondary heater, the primary heater is an electric heating device wound on the leakage pipeline of the cooling tower, and the secondary heater is an electric heating device arranged in the circulating pool of the cooling tower.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
(1) the utility model discloses a different cooling mechanism of rational utilization and duplex condition refrigerating unit's efficiency, according to the system load height, the design with adopt multistage cooling mechanism to form changeable cooling circulation circuit with the user respectively through pipeline and valve, simultaneously, for the high-efficient operation of maintaining cooling circulation circuit safety and stability, the utility model discloses to the cooling mechanism in the different cooling circulation circuit and designed two kinds of cooling tower clusters specially, be cooling tower cluster in summer and cooling tower cluster in winter respectively, can realize the low energy consumption operation at different periods and different season operating mode lower system energy station.
(2) The utility model discloses can the period and season, select to satisfy energy cooling work that energy efficiency and safe cooling circulation circuit and cooling water circulation circuit realize regional cooling system according to the system load height, including multiple mode of regulation, for example summer daytime cooling mode, summer night refrigeration mode, winter cooling mode etc. through the switching of different modes, can solve current water-cooling central air conditioning system and industrial cycle and adopt full load cooling tower system and the problem that the energy consumption that exists is high and the operating efficiency is low.
(3) For preventing the lower condition that causes the cooling water to supply the return line to freeze at the cooling tower of outdoor ambient temperature, the utility model discloses it has multistage heating device still to design to the cooling tower cluster in winter, can divide the two-stage to different ambient temperature and heat, can not only improve the operating efficiency of cooling tower equipment, can also effective control energy consumption, reduce system's running cost.
Drawings
Fig. 1 is a schematic view of the system flow of the present invention.
Fig. 2 is a system schematic diagram of the winter cooling tower cluster of the present invention.
The system comprises a cooling tower cluster in winter, a cooling tower cluster in summer, a refrigerating unit in double working conditions, a base refrigerating machine 4, a plate heat exchanger 5, an ice storage tank 6, a user 7, a primary heater 8, a secondary heater 9 and a fan 10.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
Example (b):
the cooling system is used for circularly supplying cold to a user 7 by matching with the regional cold supply system, and specifically comprises a base cold carrier 4, a plate heat exchanger 5, an ice storage pool 6, a summer cooling tower cluster 2, a winter cooling tower cluster 1, a pipeline for connection, a valve for switching and the like, and can form a cold supply circulating unit and a cooling water circulating unit.
Among the cooling circulation unit, can regard base cold machine 4 as one-level cooling mechanism, plate heat exchanger 5 is as second grade cooling mechanism, ice storage tank 6 is as tertiary cooling mechanism, constitute tertiary cooling circuit through pipeline and user 7, base cold machine 4 carries out the heat transfer through the low-temperature cooling water of cooling tower crowd 2 in summer, plate heat exchanger 5 and ice storage tank 6 all adopt the ethylene glycol as the cryogen, and form the return circuit through the cryogen passageway expert respectively with duplex condition refrigerating unit 3, duplex condition machine then carries out the heat transfer through the low-temperature cooling water of cooling tower crowd 1 in winter.
Certainly, through the switching of pipeline and valve, also can form the second grade cooling circuit with base cold machine 4 and ice-storage tank 6 series connection, at this moment, can close the dual-duty machine, base cold machine 4 accessible cooling tower cluster 2's low-temperature cooling water carries out the heat transfer in summer, also can be for reducing the operating frequency of cooling tower cluster 2 in summer, set up the bypass pipe and communicate between cooling tower cluster 2 in summer and cooling tower cluster 1 in winter and form the return circuit, through the valve on the control bypass pipe, utilize cooling tower cluster 2 in summer and cooling tower cluster 1 in winter to carry out the heat transfer to base cold machine 4 simultaneously. Or the base cold carrier 4 and the user 7 can form a primary cooling loop, and the base cold carrier 4 only uses low-temperature cooling water of the cooling tower cluster 2 in summer to exchange heat; the ice storage pool 6 can also be made into ice by an ice block cooling circuit formed by the ice storage pool 6 and the user 7 at night under low load by using a dual-working-condition machine.
Referring to FIG. 1, when the operation mode is a cooling mode in summer and daytime, S-1 is I-II communication, S-2 is II-III communication, S-3 is II-III communication, S-4 is I-III communication, S-5 is I-III communication, and S-6 is I-III communication. The double-working-condition refrigerating unit 3 is in a refrigerating mode and is used for preparing glycol solution with lower temperature and supplying the glycol solution to the plate type heat exchanger 5 for heat exchange. User return water with high temperature enters the base load cooler 4 to be subjected to primary cooling, chilled water after heat exchange is finished enters the plate heat exchanger 5 to be subjected to secondary cooling with low-temperature glycol solution, then enters the ice storage tank 6 to be subjected to tertiary cooling with ice blocks in the ice storage tank, the low-temperature chilled water after heat exchange is supplied to a user 7 through a cold water supply pump B-5, and after heat exchange is finished at the side of the user 7, the chilled water enters the base load cooler 4 to be cooled under the action of a cooling water pump B-4, so that a cooling circulation is finished. The low-temperature cooling water return water from the summer cooling tower cluster 2 exchanges heat with the base-load cooler 4 under the action of the base-load cooling water pump B-2, the high-temperature cooling water after heat exchange returns to the summer cooling tower cluster 2 for cooling, the low-temperature cooling water return water from the winter cooling tower cluster 1 exchanges heat with the dual-working-condition refrigerating unit 3 under the action of the dual-working-condition cooling water pump B-1, the high-temperature cooling water after heat exchange returns to the winter cooling tower cluster 1 for cooling, and therefore cooling water circulation is completed. When the summer cooling load is low, the cooling mode (reducing the cooling level) can be set according to the requirement to reduce the energy consumption, for example: the two-stage cooling is omitted, the double-working-condition refrigerating unit 3 is closed, valves (F-17 and F-18) of a bypass pipe are opened, valves (F-9-F-16) of water pipes at the inlet and the outlet of the cooling tower cluster 1 in winter are opened, and the running frequency of a fan 10 of the cooling tower cluster 2 in summer is reduced in a proper amount until the fan 10 is closed.
Referring to FIG. 1, when the operation mode is a summer night cooling mode, S-1 is I-III communication, S-2 is I-III communication, S-3 is I-III communication, S-5 is I-III communication, and S-6 is I-III communication. The double-working-condition unit 3 is in an ice making mode, and at the moment, the low-temperature ethylene glycol prepared by the double-working-condition unit 3 enters the ice storage tank 6 for heat exchange until the ice is frozen, and the process is an ice storage process. When cooling is carried out at night, because the cooling load of the user 7 is small, only the base cold carrier 4 is used for refrigerating, the user backwater with higher temperature enters the base cold carrier 4 for cooling, then is supplied to the user 7 through the cold water supply pump B-5, and returns to the ice storage tank 6 under the action of the cold water supply pump B-5 after heat exchange is completed at the user side, so that a cooling cycle is completed. And low-temperature cooling water return water from the winter cooling tower cluster 1 exchanges heat with the dual-working-condition refrigerating unit 3 under the action of the dual-working-condition cooling water pump B-1, and high-temperature cooling water after heat exchange returns to the winter cooling tower cluster 1 to be cooled, so that cooling water circulation is completed.
Referring to fig. 1, when the operation mode is the winter cooling mode, since the cooling load of the user is small in winter, the cooling mode only needs to turn on the cold water supply pump B-5, so that the water of the user 7 exchanges heat (i.e., melts ice) with the ice blocks in the ice storage tank 6. The ice making is still performed at night, the low-temperature cooling water return water from the winter cooling tower cluster 1 exchanges heat with the double-working-condition refrigerating unit 3 under the action of the double-working-condition cooling water pump B-1, and the low-temperature cooling water return water returns to the winter cooling tower cluster 1 to be cooled after the heat exchange is completed, so that a cooling water cycle is completed.
Referring to fig. 2, in order to prevent the cooling water from freezing in the cooling tower return supply line due to low outdoor ambient temperature, an electric heating device, such as a primary heater 8, is wound on the external leakage line, and an electric heating device, such as a secondary heater 9, is arranged in the cooling tower circulation pool. The switching of the primary heater 8 and the secondary heater 9 is controlled according to the outdoor ambient temperature, when the ambient temperature is lower than a set value (generally 5 ℃), the primary heater 8 is turned on, and when the ambient temperature is lower than the set temperature (generally 0 ℃), the secondary heater 9 is turned on. And calculating the water conservancy balance of the cooling tower cluster according to the cooling water pump, judging the number of the operating cooling towers (CT1-CT4), and controlling the number of the operating cooling towers through inlet and outlet pipeline valves (F-1-F-8) of the cooling towers. According to the temperature parameter collected by the temperature instrument 11 of the water outlet pipe of the cooling tower, the operation frequency of the fan 10 of the cooling tower is controlled, when the collected temperature is higher than the set value temperature (generally 28 ℃), the operation frequency of the fan 10 is increased (the initial frequency is 30Hz), and the stepping frequency is 5Hz (which can be modified according to the requirement).
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.
Claims (7)
1. A zone cooling based cooling system, characterized by: including cooling circulation unit and cooling water circulation unit, wherein, cooling circulation unit includes: the switchable cooling loop is composed of at least one of the first-stage cooling mechanism, the second-stage cooling mechanism and the third-stage cooling mechanism and a user (7), and refrigerant channels of the second-stage cooling mechanism and the third-stage cooling mechanism respectively form loops with the dual-working-condition refrigerating unit (3);
the cooling water circulation unit includes: the cooling system comprises a summer cooling tower cluster (2) and a winter cooling tower cluster (1), wherein the summer cooling tower cluster (2) and a cooling water channel of a primary cooling mechanism form a loop, and the winter cooling tower cluster (1) and a cooling water channel of a double-working-condition refrigerating unit (3) form a loop.
2. A zone cooling based cooling system according to claim 1, wherein: the primary cooling mechanism is a base cold carrier (4), the secondary cooling mechanism is a plate heat exchanger (5), and the tertiary cooling mechanism is an ice storage pool (6).
3. A zone cooling based cooling system according to claim 2, wherein: the cooling circuit includes: a three-stage cooling loop consisting of a base cold carrier (4), a plate heat exchanger (5), an ice storage pool (6) and a user (7) which are communicated in sequence; a secondary cooling loop consisting of the base cold carrier (4), the ice storage pool (6) and the user (7) which are communicated in sequence; a primary cooling loop consisting of the base cold carrier (4) and the user (7); and the ice storage tank (6) and a user (7) form an ice block cooling loop, and the cooling loop is switched through a pipeline and a valve.
4. A zone cooling based cooling system according to claim 1, wherein: the summer cooling tower cluster (2) and the winter cooling tower cluster (1) are communicated through a bypass pipe to form a loop, and a valve is arranged on the bypass pipe.
5. A zone cooling based cooling system according to claim 1, wherein: the summer cooling tower cluster (2) is formed by four cross-flow type cooling towers which are arranged in parallel.
6. A zone cooling based cooling system according to claim 1, wherein: the winter cooling tower cluster (1) is four cross-flow type parallel cooling towers provided with heating systems.
7. The zone cooling based cooling system of claim 6, wherein: the heating system comprises a primary heater (8) and a secondary heater (9), the primary heater (8) is an electric heating device wound on a leakage pipeline outside the cooling tower, and the secondary heater (9) is an electric heating device arranged in a circulating pool of the cooling tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220552081.6U CN217330049U (en) | 2022-03-14 | 2022-03-14 | Cooling system based on regional cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220552081.6U CN217330049U (en) | 2022-03-14 | 2022-03-14 | Cooling system based on regional cooling |
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| Publication Number | Publication Date |
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| CN217330049U true CN217330049U (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220552081.6U Active CN217330049U (en) | 2022-03-14 | 2022-03-14 | Cooling system based on regional cooling |
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| CN (1) | CN217330049U (en) |
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