CN210197600U - Secondary pump variable flow chilled water system with energy storage device - Google Patents
Secondary pump variable flow chilled water system with energy storage device Download PDFInfo
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- CN210197600U CN210197600U CN201920915202.7U CN201920915202U CN210197600U CN 210197600 U CN210197600 U CN 210197600U CN 201920915202 U CN201920915202 U CN 201920915202U CN 210197600 U CN210197600 U CN 210197600U
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Abstract
The utility model discloses a take energy memory's secondary pump variable flow chilled water system. The secondary pump variable-flow chilled water system comprises a plurality of air conditioner terminal devices, a water collector, a water distributor, more than two groups of refrigerating units, an energy storage device and a plurality of water supply branch pipes, wherein the energy storage device is connected in parallel with the refrigerating units between a return water main pipe and a water supply main pipe of the secondary pump variable-flow chilled water system; the energy storage device comprises a main valve, a water supply branch pipe, a main valve, an energy storage device, a branch valve, a main valve and a main valve, wherein the number of the water supply branch pipes is the same as that of the refrigerating units, the starting end of each water supply branch pipe is connected to a pipeline between the corresponding refrigerating unit and the main valve, the tail end of each water supply branch pipe is connected with the energy. The utility model has the advantages that: temperature fluctuation of a traditional primary pump system and a traditional secondary pump system when the number of units is increased or decreased is avoided, cold water at the tail end is kept constant, system fluctuation is reduced for a technical air conditioner, and product quality is more stable.
Description
Technical Field
The utility model relates to an air conditioning equipment field, especially a take energy memory's secondary pump variable flow chilled water system.
Background
Most of the existing large-scale central air-conditioning systems adopt an air-conditioning system using water as a cold (heat) transfer medium, and mainly comprise: cold and heat source, circulating water pump 2, end device, autonomous system. The cold and heat source may adopt the forms of a water chilling unit, a heat pump unit, a boiler and the like according to the actual engineering requirement. Water systems are mainly of the following three types: the primary pump constant flow system (shown in figure 1), the primary pump variable flow system (shown in figure 2) and the secondary pump variable flow system (shown in figure 3).
As the cold and heat sources designed by the air conditioning system are all configured with equipment according to the maximum load, and the full-load operation is not reached in most of time, the number of the cold water units generally configured in the refrigeration machine room is 2-4 according to the design specification, and the following 2 problems exist in any system.
Firstly, the method comprises the following steps: when the cold load changes and the number of the current startup units cannot meet the load, the number of the startup units needs to be increased, at this time, the number of water pumps needs to be increased, then an evaporator valve of a cold water main unit to be started is opened, at this time, the equipment cannot be refrigerated because the refrigeration main unit is not opened, generally, one cold water main unit is opened until the main unit is normally refrigerated, the required time is about 5-15 minutes, the temperature of inlet chilled water is assumed to be 12 ℃, the temperature of outlet water is still 12 ℃, if the cold water main unit is originally opened, the refrigerating amount of the subsequently opened refrigeration main unit is consistent with that of the previous one, the original set temperature of outlet water is 7 ℃, the temperature of outlet water after mixing is 9.5 ℃, the temperature of chilled water supplied to the tail end is only higher than the set temperature, at this time, because the tail end electric two-way valve does not act, after the temperature of a room rises, the two-way valve can act to open a large valve, increase the flow of chilled water and reduce the indoor temperature to a set temperature, which inevitably brings about fluctuation of the indoor temperature, and if the air conditioner is a process air conditioner, the problems of reduction of the rate of good products and increase of the rate of defective products are often caused; when the cold load changes, the number of the current started units is too many, the efficiency of a machine room is reduced, the opening of a water chilling unit is often reduced, the load of the unit is reduced until the unit is closed, the water supply temperature of a system is increased, after the unit is closed, chilled water is often required to be circulated for more than 10 minutes due to the anti-freezing requirement, then a valve of an evaporator of the unit is closed, the same condition as that of starting the unit can occur in the period of time, and if the unit is a process air conditioner, the problems that the rate of good products is reduced and the rate of defective products is increased are often caused.
Secondly, the method comprises the following steps: the load of the air conditioner is very small in some time periods, the load is reduced to the condition that the refrigeration efficiency of a host is very low or the state that the host cannot normally operate at all, at the moment, the host can only be started and stopped, the continuous switching of the host can cause the following influence, 1, the water supply temperature is unstable, the influence on the environment temperature is easily caused, 2, the refrigeration equipment cannot operate in a high-efficiency interval, the energy consumption is increased, the operation efficiency of a machine room is reduced, and 3, the refrigeration equipment is frequently started and stopped and is not beneficial to the safe operation of the equipment. The failure rate of the equipment is easy to increase.
Disclosure of Invention
An object of the utility model is to provide a secondary pump variable flow chilled water system who reduces or avoids the temperature fluctuation of chilled water, ensures that manufacturability air conditioner product stable quality takes energy memory.
The purpose of the utility model is realized through the following technical scheme: a secondary pump variable flow chilled water system with an energy storage device comprises a secondary pump variable flow chilled water system, wherein the secondary pump variable flow chilled water system comprises
The air conditioner terminal equipment 6 is used for realizing indoor temperature reduction through heat exchange with chilled water, and a two-way valve 7 is arranged at a water outlet of the air conditioner terminal equipment 6;
the water collector 4 is connected with the air-conditioning terminal equipment 6 and used for recovering cooling water utilized by the air-conditioning terminal equipment 6, and a return water main pipe 41 is arranged on the water collector 4;
the water separator 5 is connected with the air-conditioning terminal equipment 6 and used for supplying cooling water to the air-conditioning terminal equipment 6, a water supply main pipe 51 is arranged on the water separator 5, and a secondary pump 9 is arranged on the water supply main pipe 51;
the water supply system comprises more than two groups of refrigerating units 1, a water pump 2 and a main valve 11, wherein the refrigerating units 1 are connected in parallel between a return water main pipe 41 and a water supply main pipe 51;
the energy storage device 3 is connected in parallel with the refrigerating unit 1 and is connected between the water return main pipe 41 and the water supply main pipe 51;
the starting ends of the water supply branch pipes 12 and the pipelines with the same number as that of the refrigerating units 1 are connected to the pipelines between the corresponding refrigerating units 1 and the main valve 11, the tail ends of the water supply branch pipes are connected with the energy storage device 3, and branch valves 13 are arranged on the water supply branch pipes 12.
Compare prior art, the utility model has the advantages of:
1. temperature fluctuation of a traditional primary pump system and a traditional secondary pump system when the number of units is increased or decreased is avoided, cold water at the tail end is kept constant, system fluctuation is reduced for a technical air conditioner, and product quality is more stable.
2. And the energy efficiency of the system can be improved and the safe operation of equipment can be guaranteed by utilizing the characteristics of the energy storage system under the condition of low load.
Drawings
FIG. 1 is a schematic diagram of a primary pump fixed flow chilled water system.
FIG. 2 is a schematic diagram of a primary pump variable flow chilled water system.
FIG. 3 is a schematic diagram of a secondary pump variable flow chilled water system.
Fig. 4 is a schematic diagram of the system of the present invention.
FIG. 5 is a diagram of the usage state of the water chiller according to the present invention in the process of increasing the water chiller;
FIG. 6 is a diagram of the usage state of the water chiller according to the present invention;
FIG. 7 is a diagram of the usage state of the water chiller according to the present invention;
FIG. 8 is a diagram of the usage state of the water chiller according to the present invention;
FIG. 9 is a view showing a state of use of the present invention in which the number of water chilling units is reduced, as shown in FIG. 1;
FIG. 10 is a view showing the usage state of the water chiller according to the present invention in a reduced number;
FIG. 11 is a view showing a state of use of the present invention when the water chiller is reduced;
FIG. 12 is a view showing the usage state of the present invention when the water chiller is reduced;
FIG. 13 is a diagram of the operation mode of the system with low cooling capacity;
description of reference numerals: the system comprises a refrigerating unit 1, a main valve 11, a water supply branch pipe 12, a branch valve 13, a water pump 2, an energy storage device 3, a water collector 4, a return water main pipe 41, a water separator 5, a water supply main pipe 51, air conditioner end equipment 6, a two-way valve 7, an expansion water tank 8 and a secondary pump 9.
Detailed Description
The invention is described in detail below with reference to the drawings and examples of the specification:
as shown in FIG. 4, the utility model provides a secondary pump variable flow chilled water system with an energy storage device. It includes secondary pump variable flow refrigerated water system, the secondary pump variable flow refrigerated water system includes
The air conditioner terminal equipment 6 is used for realizing indoor temperature reduction through heat exchange with cooling water, and a two-way valve 7 is arranged at a water outlet of the air conditioner terminal equipment 6;
the water collector 4 is connected with the air-conditioning terminal equipment 6 and used for recovering cooling water utilized by the air-conditioning terminal equipment 6, and a return water main pipe 41 is arranged on the water collector 4;
the water separator 5 is connected with the air-conditioning terminal equipment 6 and used for supplying cooling water to the air-conditioning terminal equipment 6, a water supply main pipe 51 is arranged on the water separator 5, and a secondary pump 9 is arranged on the water supply main pipe 51;
the water supply system comprises more than two groups of refrigerating units 1, a water pump 2 and a main valve 11, wherein the refrigerating units 1 are connected in parallel between a return water main pipe 41 and a water supply main pipe 51;
the energy storage device 3 is connected in parallel with the refrigerating unit 1 and is connected between the water return main pipe 41 and the water supply main pipe 51;
the water supply branch pipes 12 are pipelines with the same number as that of the refrigerating units 1, the initial ends of the pipelines are connected to the pipelines between the corresponding refrigerating units 1 and the main valve 11, the tail ends of the pipelines are connected with the water return main pipe 41, and each water supply branch pipe 12 is provided with a branch valve 13.
The utility model discloses still include expansion tank 8, expansion tank 8 is connected with water collector 4, realizes the level pressure effect and for the moisturizing of system.
The air conditioner tail end equipment is a process type air conditioner.
The energy storage device 3 is an energy storage water tank.
The operation principle of the present invention will be described with reference to the following embodiments,
for convenience of explanation, a machine room is taken as an example with 3 refrigerating units, the other three refrigerating units are respectively marked as a refrigerating unit A, a refrigerating unit B and a refrigerating unit C, and the operation priority is that the refrigerating unit A is larger than the refrigerating unit B is larger than the refrigerating unit C;
operation mode 1. increasing and opening water chilling unit
1 refrigerating unit is started in an initial state, the started refrigerating unit is a refrigerating unit A, the cold quantity required by the system exceeds the cold quantity provided by the existing refrigerating unit A, and 1 refrigerating unit needs to be additionally started, which is described in detail as follows:
step 1, as shown in fig. 5: firstly, a water pump 2 and a branch valve 13 corresponding to the refrigerating unit B are started; the refrigerating unit B itself and the associated main valve 11 are now closed.
Step 2, as shown in fig. 6: when the started water pump 2 establishes water flow, the water chilling unit B is started, and chilled water of the water chilling unit B enters the energy storage device through the sub-valve 13 corresponding to the supercooled water unit B.
Step 3, as shown in fig. 7: when the running water outlet problem of the water chilling unit B reaches the set temperature, gradually closing the branch valve 13 corresponding to the water chilling unit B and gradually opening the main valve 11 corresponding to the water chilling unit B.
Operation mode 2, reduce the water chilling unit
1 refrigerating unit is started in an initial state, the cold quantity required by the system is less than that provided by 2 main machines, and the system reduces and starts 1 water chilling unit according to the requirement;
step 1, as shown in fig. 9: and gradually closing the main valve 11 corresponding to the water chilling unit C and simultaneously gradually opening the branch valve 13 corresponding to the water chilling unit C.
Step 2, as shown in fig. 10: when the main valve 11 corresponding to the water chilling unit C is completely closed and the branch valve 13 corresponding to the water chilling unit C is completely opened, the water chilling unit C is ready to be closed;
step 3, as shown in fig. 11: when the water chilling unit C is completely closed, the water pump 2 corresponding to the water chilling unit C needs to be operated for a period of time;
Operation mode 3. operation mode of system with small cooling capacity
As shown in fig. 13: when system demand cold volume is very few, the refrigerated water end of refrigerating unit A production can't use up, unnecessary refrigerated water just flows along energy memory's low temperature side direction high temperature side this moment, the refrigerated water temperature and the low temperature side when the high temperature side are unanimous, refrigerating unit A is closed this moment, utilize the low-temperature water that energy storage water tank stored to terminal cooling, when energy storage water tank refrigerated water consumes totally basically, refrigerating unit A is opened, the energy storage is accomplished on one side to the cooling, refrigerating unit A can be in higher efficiency point work this moment, and reduce frequent opening of refrigerating unit A and stop and can also guarantee terminal water supply temperature.
The utility model discloses with the refrigerated water production side of secondary pump system and the characteristic of two circulation detached characteristics of refrigerated water distribution side and energy storage water tank cold water temperature subregion, the refrigerated water circulation that utilizes the diverter valve to divide into the refrigerator evaporimeter is big circulation and little circulation, make and all can keep flowing to terminal freezing temperature invariable when increasing refrigerating unit 1 and reducing refrigerating unit 1, utilize energy memory's energy storage function in the time of little load, make the cooling water set avoid frequently opening the disadvantage of opening and stopping, and can make the cooling water set be in high-efficient interval internal work, thereby the efficiency that has improved the cooling water machine room has reduced the energy consumption.
Claims (4)
1. A secondary pump variable flow chilled water system with an energy storage device comprises a secondary pump variable flow chilled water system, wherein the secondary pump variable flow chilled water system comprises
The air conditioner terminal equipment (6) is used for realizing indoor temperature reduction through heat exchange with cooling water, and a two-way valve (7) is arranged at a water outlet of the air conditioner terminal equipment (6);
the water collector (4) is connected with the air conditioner terminal equipment (6) and is used for recovering cooling water utilized by the air conditioner terminal equipment (6), and a water return main pipe (41) is arranged on the water collector (4);
the water separator (5) is connected with the air-conditioning terminal equipment (6) and is used for supplying cooling water to the air-conditioning terminal equipment (6), a water supply main pipe (51) is arranged on the water separator (5), and a secondary pump (9) is arranged on the water supply main pipe (51);
the water supply system comprises more than two groups of refrigerating units (1) which are connected in parallel between a water return main pipe (41) and a water supply main pipe (51), wherein a water pump (2) is arranged on a water inlet end pipeline of each refrigerating unit (1), and a main valve (11) is arranged on a water outlet end pipeline of each refrigerating unit (1);
the method is characterized in that: it also comprises
The energy storage device (3) is connected in parallel with the refrigerating unit (1) and is connected between the water return main pipe (41) and the water supply main pipe (51);
the water supply branch pipes (12) and the refrigerating unit (1) are the same in number, the initial ends of the pipes are connected to the pipelines between the corresponding refrigerating unit (1) and the main valve (11), the tail ends of the pipes are connected with a water return main pipe (41), and each water supply branch pipe (12) is provided with a branch valve (13).
2. A secondary pump variable flow chilled water system with energy storage device as claimed in claim 1, characterized in that: the water-saving device also comprises an expansion water tank (8) which is connected with the water collector (4) to realize the constant pressure effect and supplement water for the system.
3. A secondary pump variable flow chilled water system with energy storage device as claimed in claim 1, characterized in that: the air conditioner tail end equipment is a process type air conditioner.
4. A secondary pump variable flow chilled water system with energy storage device as claimed in claim 1, characterized in that: the energy storage device (3) is an energy storage water tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920915202.7U CN210197600U (en) | 2019-06-18 | 2019-06-18 | Secondary pump variable flow chilled water system with energy storage device |
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| CN201920915202.7U CN210197600U (en) | 2019-06-18 | 2019-06-18 | Secondary pump variable flow chilled water system with energy storage device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412707A (en) * | 2020-04-03 | 2020-07-14 | 西安建筑科技大学 | Water cooling device |
| CN112303771A (en) * | 2020-11-17 | 2021-02-02 | 深圳市柏涛蓝森国际建筑设计有限公司 | Central air conditioning system based on primary pump and control method |
| CN112484274A (en) * | 2020-12-03 | 2021-03-12 | 佛山市顺德区美的电子科技有限公司 | Air conditioner, control method and control device thereof, storage medium and electronic equipment |
| CN113531698A (en) * | 2020-10-12 | 2021-10-22 | 中铁第六勘察设计院集团有限公司 | Single-pipe air conditioner terminal equipment chilled water connecting pipe pipeline |
| CN114719357A (en) * | 2022-04-12 | 2022-07-08 | 湖北华工能源股份有限公司 | Energy-saving design method for secondary cascade pump of central air conditioner |
| CN114893838A (en) * | 2022-06-15 | 2022-08-12 | 珠海格力电器股份有限公司 | Cooling device, control method thereof, controller, cooling system and storage medium |
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2019
- 2019-06-18 CN CN201920915202.7U patent/CN210197600U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111412707A (en) * | 2020-04-03 | 2020-07-14 | 西安建筑科技大学 | Water cooling device |
| CN113531698A (en) * | 2020-10-12 | 2021-10-22 | 中铁第六勘察设计院集团有限公司 | Single-pipe air conditioner terminal equipment chilled water connecting pipe pipeline |
| CN112303771A (en) * | 2020-11-17 | 2021-02-02 | 深圳市柏涛蓝森国际建筑设计有限公司 | Central air conditioning system based on primary pump and control method |
| CN112484274A (en) * | 2020-12-03 | 2021-03-12 | 佛山市顺德区美的电子科技有限公司 | Air conditioner, control method and control device thereof, storage medium and electronic equipment |
| CN112484274B (en) * | 2020-12-03 | 2022-03-29 | 佛山市顺德区美的电子科技有限公司 | Air conditioner, control method and control device thereof, storage medium and electronic equipment |
| CN114719357A (en) * | 2022-04-12 | 2022-07-08 | 湖北华工能源股份有限公司 | Energy-saving design method for secondary cascade pump of central air conditioner |
| CN114893838A (en) * | 2022-06-15 | 2022-08-12 | 珠海格力电器股份有限公司 | Cooling device, control method thereof, controller, cooling system and storage medium |
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