CN102538111B - Water cold accumulation air conditioning system for direct cold accumulation and mixed cold discharge and running method thereof - Google Patents
Water cold accumulation air conditioning system for direct cold accumulation and mixed cold discharge and running method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of refrigeration, and discloses a water cold accumulation air conditioning system for direct cold accumulation and mixed cold discharge and a running method of the system. The system comprises a refrigeration host machine, a cold accumulation water channel, a chilled water circulating pump, a chilled water feeding pump, a cold discharge pump, a mix valve and a flow divider valve. The running method comprises the following steps of: mixing chilled water discharged out of a cold end of the cold accumulation water channel with some user return water from the flow divider valve, and feeding the mixed water to a user for discharging through the cold discharge pump and the chilled water feeding pump. According to the invention, different cold accumulation and cold discharge working conditions can be realized by controlling the turning on or off of each component of the system. The cold quantity use ratio and the clod discharge efficiency of the cold accumulation water channel can be improved by the means that the cold accumulation water channel and the refrigeration host machine synergistically discharge cold; the failure rate of related valves can be reduced by the means that the user return water is mixed with the chilled water of the cold accumulation water channel; and the use of a panel type heat exchanger is eliminated after the system provided by the invention is used, so that the cost of the whole system is reduced, and the space use ratio is improved.
Description
Technical Field
The invention belongs to the technical field of refrigeration, and discloses a chilled water storage air conditioning system and an operation method thereof. More particularly, the present invention discloses a chilled water storage air conditioning system for direct cold storage and mixed cold discharge and an operation method thereof.
Background
The proportion of the energy consumption of buildings in China over the years in the total energy consumption is about 20%, wherein the energy consumption of the heating, ventilating and air conditioning accounts for about 85% of the energy consumption of the buildings. The energy consumption of the air conditioner shows obvious seasonality and plays a decisive role in the annual and daily electric load peak-valley distribution of the building. The heating ventilation air conditioner is reasonably operated by combining an energy storage technology, stores cold at night, and releases cold at peak time in the daytime, so that the method is an effective means for realizing 'peak shifting and valley filling' of the load of the power grid, and the mutual matching of the peak-valley electricity price policy and the energy storage technology is an effective way for saving energy consumption and cost for air conditioner users.
At present, the relatively mature cold accumulation technology with corresponding commercial scale is mainly chilled water storage and ice storage technology, and the chilled water storage technology is suitable for the transformation of the existing air conditioning system due to the fact that the structure and the operation are relatively simple and no special requirements are imposed on an air conditioning host machine, so that the chilled water storage technology is widely favored in the industry.
The joint operation mode of the chilled water storage system and the air conditioner host directly influences the efficiency and the cold storage capacity of the host, and meanwhile, the adjustability for meeting the load requirements of users is determined. The existing water cold accumulation system and a central air conditioner are operated jointly, a large number of cases exist in the cold accumulation process or the case of adopting a plate heat exchanger when cold energy is provided for users, although the plate heat exchanger can ensure the safety, reliability and adjustability of related pipeline electric valves and reduce the maintenance rate of the pipeline valves, the plate heat exchanger reduces the cold accumulation or supply efficiency and increases the equipment investment and the space occupation. For a system without a plate heat exchanger, the electric valve at the hot end inlet of the cold accumulation water tank bears a large pressure difference, and the change of the load requires the electric valve to have high sensitivity and quick response capability for adjustment, so that the failure rate of the electric actuating mechanism of the valve is high. And the existing system can not be simultaneously suitable for the conditions of a low-temperature machine and a medium-temperature machine, and the regulation of the temperature of the chilled water according to the load of a user is limited.
Disclosure of Invention
The invention aims to solve the technical problems that the cold accumulation or cold discharge efficiency is reduced by adopting a plate type heat exchanger, the equipment investment and the space occupation are increased, the failure rate of an electric valve is high when the plate type heat exchanger is not adopted, and the defects that a low-temperature machine and a medium-temperature machine cannot be simultaneously applied are overcome, and the water cold accumulation air-conditioning system which has the advantages of high cold accumulation or cold discharge efficiency, low equipment cost, high space utilization rate, low valve failure rate and suitability of the low-temperature machine and the medium-temperature machine for direct cold accumulation and mixed cold discharge of a refrigeration host machine and the operation method thereof are provided.
The technical problem to be solved by the invention is realized by the following technical scheme: according to one aspect of the present invention, there is provided a chilled water storage air conditioning system for direct cold storage and mixed cold discharge, including a refrigeration host, a cold storage water tank, a chilled water circulation pump, a chilled water supply pump, a cold discharge pump, a first stop valve, a second stop valve, and a third stop valve; the outlet of the chilled water circulating pump is connected with the inlet of the refrigeration host through the first stop valve, one path of the outlet of the refrigeration host is connected with the inlet of the chilled water supply pump after passing through the second stop valve, and the other path of the outlet of the refrigeration host is connected with the cold end of the cold accumulation water tank through the third stop valve; the hot end of the cold accumulation water tank is connected with the inlet of the chilled water circulating pump, the cold end of the cold accumulation water tank is also provided with a mixed cooling bypass, the mixed cooling bypass is provided with the cooling pump, the outlet of the cooling pump is connected with the inlet of the chilled water supply pump,
wherein, still be equipped with the blend valve on the cold side road is put in the mixture, the blend valve is connected with the flow divider, the inlet connection of flow divider has the jar that catchments of user's return water stored, the export of blend valve with put the entry linkage of cold pump, the entry of blend valve respectively with the cold junction of cold-storage basin with the first exit linkage of flow divider, with mix the refrigerated water of cold-storage basin release with the partly of user's return water forms the mixed refrigerated water of user's confession cold.
In the chilled water storage air conditioning system with direct cold storage and mixed cold discharge, the second outlet of the flow dividing valve is respectively connected with the hot end of the cold storage water tank and the inlet of the chilled water circulating pump (3).
In the above chilled water storage air conditioning system for direct cold storage and mixed cold discharge, the refrigeration host comprises at least two water coolers, and at least one regulating valve is arranged between the at least two water coolers.
According to another aspect of the invention, an operation method of a direct cold storage and mixed cold discharge water cold storage air-conditioning system is provided, wherein the operation method comprises a refrigeration host cold storage working condition and a cold storage water tank mixed cold discharge working condition; wherein,
the cold accumulation working condition of the refrigeration host comprises: the chilled water supply pump, the flow dividing valve, the mixing valve and the cold discharge pump are closed, the chilled water circulating pump, the refrigeration host, the cold accumulation water tank, the first stop valve, the second stop valve and the third stop valve are opened, and the refrigeration host provides chilled water for the cold accumulation water tank through the second stop valve and the third stop valve;
the cold accumulation basin mixes puts cold operating mode and includes: the refrigerating system is characterized in that the refrigerating system comprises a refrigerating main machine, a cold accumulation water tank, a cold accumulation water supply pump, a flow dividing valve, a mixing valve and a refrigerating pump, wherein the refrigerating water circulating pump, the refrigerating main machine, the first stop valve, the second stop valve and the third stop valve are closed, the cold accumulation water tank, the refrigerating water supply pump, the flow dividing valve, the mixing valve and the refrigerating pump are opened, refrigerating water discharged from the cold end of the cold accumulation water tank is mixed with part of user return water from the flow dividing valve to form mixed refrigerating water, and the mixed refrigerating water is cooled for a user through the refrigerating pump and the refrigerating water supply pump.
In the operation method of the chilled water storage air conditioning system with direct cold storage and mixed cold release, in the working condition of mixed cold release of the cold storage water tank, the other part of the user backwater from the flow divider valve enters the hot end of the cold storage water tank.
In the operation method of the chilled water storage air conditioning system with direct cold storage and mixed cold discharge, the operation method further comprises a cold storage water tank and a refrigeration host combined cold discharge working condition: closing the third stop valve; the mixed chilled water flows through the refrigeration pump to be mixed with chilled water from the refrigeration main machine, and then is supplied with cold for users through the chilled water supply pump.
In the operation method of the chilled water storage air conditioning system with direct cold storage and mixed cold discharge, in the combined cold discharge working condition of the cold storage water tank and the refrigeration host, the other part of the user backwater from the flow dividing valve respectively enters the hot end of the cold storage water tank and enters the refrigeration host through the chilled water circulating pump.
In the operation method of the chilled water storage air conditioning system with direct cold storage and mixed cold release, the operation method further comprises the working conditions of cold storage and cold release of the refrigeration main machine: the flow dividing valve, the mixing valve and the cold discharging pump are closed, the chilled water circulating pump, the refrigeration host, the cold accumulation water tank, the chilled water supply pump, the first stop valve, the second stop valve and the third stop valve are opened, chilled water output by the refrigeration host is supplied to the cold accumulation water tank through the second stop valve and the third stop valve respectively, and the chilled water supply pump supplies cold for users.
In the operation method of the chilled water storage air conditioning system for direct cold storage and mixed cold release, in the working condition of cold storage and cold release of the refrigeration host, the other part of the user backwater from the flow divider and the hot end effluent of the cold storage water tank enter the refrigeration host through the chilled water circulating pump.
In the operation method of the chilled water storage air conditioning system with direct cold storage and mixed cold discharge, the operation method further comprises the working condition of cold discharge of the refrigeration main machine: close cold-storage basin, third stop valve, mixing valve and put the cold pump, open refrigeration host computer, refrigerated water circulating pump, refrigerated water supply pump, flow divider, first stop valve and second stop valve, the refrigerated water warp of refrigeration host computer output the refrigerated water supply pump supplies cold for the user, comes from the user return water warp of flow divider the refrigerated water circulating pump gets into the refrigeration host computer.
The implementation of the invention can obtain the following beneficial effects: (1) the cold storage water tank and the refrigeration host cooperate to supply cold for users, and the cold discharge capacity of the refrigeration host and the cold storage water tank can be reasonably distributed, so that the cold discharge capacity utilization rate and the cold discharge efficiency of the cold storage water tank are improved; (2) the cold supply by adopting the mode of mixing the user backwater and the chilled water of the cold storage water tank not only can realize cold discharge which is more matched with the load of a user, but also can effectively reduce the pressure difference of the hot end of the cold storage water tank, further reduce the fault rate of related valves and effectively control the operation and maintenance cost of the system; (3) the system of the invention improves the cold accumulation and the cold discharge efficiency and simultaneously cancels the plate heat exchanger, thereby reducing the cost of the whole system and improving the space utilization rate. The chilled water storage air conditioning system has high efficiency, high flexibility and low cost; the system operation method is convenient to implement and simple, convenient and effective to operate.
Drawings
The invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. In the drawings:
FIG. 1 is a schematic structural diagram of a direct cold storage and hybrid cold discharge chilled water storage air conditioning system according to the present invention;
FIG. 2 is a schematic view of a hybrid cold discharge condition of a cold storage sink according to the present invention;
FIG. 3 is a schematic diagram of a refrigeration host according to the present invention;
FIG. 4 is a schematic view of the cold accumulation water tank and the refrigeration main machine combined cooling working condition according to the invention;
FIG. 5 is a schematic view of the cooling host for accumulating and releasing cold according to the present invention; and
fig. 6 is a schematic view of the cooling condition of the main refrigerating unit according to the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a chilled water storage air conditioning system for direct cold storage and mixed cold discharge according to the present invention. The system comprises a refrigeration host 1, a cold accumulation water tank 2, a chilled water circulating pump 3, a chilled water supply pump 4, a cold discharge pump 5, a first stop valve V1, a second stop valve V2 and a third stop valve V3; the outlet of the chilled water circulating pump 3 is connected with the inlet of the refrigeration host 1 through a first stop valve V1, one path of the outlet of the refrigeration host 1 is connected with the inlet of the chilled water supply pump 4 through a second stop valve V2, and the other path of the outlet of the refrigeration host is connected with the cold end of the cold accumulation water tank 2 through a third stop valve V3; the hot junction of cold-storage basin 2 is connected the entry of refrigerated water circulating pump 3, and the cold junction of cold-storage basin 2 still is equipped with the mixed cold bypass of putting, is equipped with on this mixed cold bypass of putting and puts cold pump 5, puts the exit of cold pump 5 and the entry linkage of refrigerated water feed pump 4. According to the invention, a mixing valve 6 is further arranged on the mixed cooling bypass, the mixing valve 6 is connected with a shunt valve 7, an inlet of the shunt valve 7 is connected with a water collecting cylinder for storing return water of a user, an outlet of the mixing valve 6 is connected with an inlet of a cooling pump 5, an inlet of the mixing valve 6 is respectively connected with a cold end of the cold storage water tank 2 and a first outlet of the shunt valve 7, and the chilled water released by the cold storage water tank 2 and a part of the return water of the user are mixed to form mixed chilled water for cooling the user.
The passage formed by the refrigeration main unit 1, the second stop valve V2, the third stop valve V3, and the cold storage water tank 2 is referred to as a cold storage bypass. Namely, the cold end of the cold accumulation water tank 2 is divided into a cold accumulation bypass L1 and a mixed cold discharge bypass L2. The cold storage water tank 2 of the present invention preferably uses a natural stratified cold storage water tank.
In the invention, the chilled water storage air conditioning system as shown in figure 1 can realize direct cold storage. For example, chilled water is supplied to the cold-storage water tank 2 by the refrigeration host 1, or chilled water is supplied to the cold-storage water tank 2 by the refrigeration host 1 while cooling is supplied to the user. The chilled water storage air conditioning system as shown in fig. 1 can realize mixed cooling. For example, chilled water discharged from the cold end of the cold storage water tank 2 is mixed with a part of user return water from the flow dividing valve 7 and then cooled by a user, or chilled water discharged from the cold end of the cold storage water tank 2 is mixed with user return water from the flow dividing valve 7 and then mixed with chilled water from the refrigeration main unit 1 through the 5-stage cooling pump and then cooled by a user. In addition, the chilled water storage air conditioning system as shown in fig. 1 can realize direct cooling. For example, chilled water is supplied to a user by the refrigeration main 1, thereby achieving cooling. The water cold storage system can adapt to different user load requirements under various working conditions, the cold storage and discharge efficiency is obviously improved, and the flexibility of the system is enhanced.
In addition, the second outlet of the flow divider 7 is connected with the hot end of the cold accumulation water tank 2 and the inlet of the chilled water circulating pump 3, and the function is that under the condition that the cold accumulation water tank 2 or the refrigeration host 1 is cooled, the return water of the user is adopted to respectively supplement proper amount of water for the cold accumulation water tank and the refrigeration host, so that the water balance in the system is kept. The following describes in detail how the user return water output by the diverter valve 7 maintains water balance in the system at each particular operating condition.
In fig. 1, the refrigeration main unit 1 is composed of two water coolers 11 and 12. Another advantage of the present invention compared to the prior art is that at least one regulating valve, such as the regulating valve V4 shown in fig. 1, can be further provided between the water coolers making up the refrigeration main 1. The water coolers can realize the operation modes of series connection, parallel connection or series-parallel connection through the arrangement of the regulating valve, and the adjustability of the refrigeration main machine is enhanced. More importantly, a plurality of (for example, two) water coolers of the refrigeration main machine arranged in the way can be all low-temperature machines or can be reasonable matching of the low-temperature machines and the medium-temperature machines. It should be understood that the present invention is not limited to the number of water coolers constituting the main refrigerating unit, and those skilled in the art can select any number and any type of water coolers according to practical situations, on the premise of satisfying cost, space and cold storage and release efficiency.
The operation method of the chilled water storage air conditioning system for direct cold storage and mixed cold discharge of the present invention will be described in detail with reference to fig. 2 to 6.
Referring to fig. 2, fig. 2 is a schematic view illustrating a hybrid cool-down condition of the cold-storage water tank according to the present invention. At the moment, the refrigerating unit stops running, and the chilled water circulating valve, the refrigerating main machine, the first stop valve, the second stop valve and the third stop valve are all closed; the cold storage water tank 2 supplies cold to the user through the mixed cold discharge bypass L2. The cold end of cold-storage basin 2 is let out the cold, and the refrigerated water who emits mixes in mixing valve 6 with a part that comes from the user's return water of flow divider 7, forms mixed refrigerated water, mixes the refrigerated water and supplies cold to the user through letting out cold pump 5 and refrigerated water supply pump 4, and another part of user's return water gets into the hot junction of cold-storage basin 2 through another export of flow divider 7 simultaneously to keep the water balance environment of system.
Compared with the prior art, the pressure difference born by the two ends of the electric valve at the hot end of the cold storage water tank is reduced to a certain extent by shunting the backwater of the user, and the operation safety and the adjustment flexibility of the corresponding valve are ensured. In addition, the mixed cooling mode can realize cooling meeting the load requirement of the user under the condition of energy saving according to the requirement of the user.
Referring to fig. 3, fig. 3 is a schematic view of a refrigeration host cold accumulation working condition according to the invention. At this time, the refrigeration main unit 1 supplies chilled water to the cold storage water tank 2 via the cold storage bypass L1. Specifically, the chilled water supply valve, the diverter valve, the mixing valve and the cold release valve are all closed; the chilled water generated by the refrigeration main unit 1 flows through the second stop valve V2 and the third stop valve V3 in sequence and then enters the cold end of the cold storage water tank 2. Meanwhile, the water from the hot end of the cold accumulation water tank 1 enters the refrigeration host 1 through the chilled water circulating pump 3.
Because the system of the invention avoids using a plate heat exchanger, the chilled water does not need to pass through the heat exchanger in the cold accumulation process, and the energy consumption is reduced to the minimum. In fact, because the system is not provided with the plate heat exchanger, the energy consumption in the cooling process is effectively controlled. The system efficiency is improved as a whole.
Referring to fig. 4, fig. 4 is a schematic view of a cold accumulation water tank and a refrigeration host combined cooling working condition according to the invention. At this time, the cold storage bypass of the cold storage system is closed, i.e., the third cut-off valve V3 is closed. Chilled water discharged from the cold end of the cold storage water tank 2 and part of user return water from the flow dividing valve 7 are mixed in the mixing valve 6 to form mixed chilled water, the mixed chilled water flows through the cooling pump 5 and then is mixed with chilled water from the refrigeration main machine 1, and then the chilled water is supplied to a user through the chilled water supply pump 4. It should be noted that the mixed chilled water must meet the load requirements of the user after being mixed with the chilled water of the refrigeration main unit 1. This can be achieved by controlling the diverter valve 7.
Meanwhile, except that a part of the user backwater stored in the water collecting tank 8 is mixed with the chilled water of the cold storage water tank 2, the other part of the user backwater stored in the water collecting tank enters the hot end of the cold storage water tank 2 and the refrigeration main machine 1 respectively. Wherein, for guaranteeing the balance of each part of the whole system, the user backwater with the same quantity of chilled water provided by the refrigeration host 1 returns to the refrigeration host 1 through the chilled water circulating pump 3, the user backwater of the rest part enters the hot end of the cold storage water tank 2, and the amount of the user backwater of the hot end of the cold storage water tank 2 is equal to the amount of the chilled water discharged from the cold end of the cold storage water tank 2.
The mode of adopting the cold accumulation water tank and the refrigeration main machine to discharge cold jointly is another embodiment of the flexibility of the invention. The cold discharge amount of the refrigeration host and the cold storage water tank can be reasonably distributed in the mode, the cold capacity utilization rate and the cold discharge efficiency of the cold storage water tank are improved, the electricity utilization of 'peak shifting and valley filling' is realized to the greatest extent, and the operation cost is saved.
Referring to fig. 5, fig. 5 is a schematic diagram of a cooling host for cold accumulation and release according to the present invention. At this time, the mixing and cooling bypass and the flow dividing valve are closed, that is, the mixing valve and the cooling valve and the flow dividing valve are closed. The chilled water output by the refrigeration host 1 is divided into two branches, one branch supplies cold to a user, and the other branch supplies chilled water to the cold storage water tank 2 through a cold storage bypass L1. Meanwhile, the hot end outlet water of the cold accumulation water tank 2 and the other part of the user backwater from the flow dividing valve 7 enter the refrigeration host 1 through the chilled water circulating pump 3. At this time, the chilled water circulation pump 3, the refrigeration host 1, the cold storage water tank 2, the chilled water supply pump 4, the first stop valve V1, the second stop valve V2, and the third stop valve V3 are correspondingly opened.
Referring to fig. 6, fig. 6 is a schematic view of the cooling condition of the main refrigeration unit according to the present invention. At the moment, the cold accumulation water tank stops running, the third stop valve, the mixing valve and the cold discharge valve are all closed, the chilled water output by the refrigeration host 1 is directly supplied to a user through the chilled water supply pump 4, and simultaneously the user backwater in the water collecting cylinder 8 returns to the refrigeration host 1 through the chilled water circulating pump 3.
Fig. 2-6 illustrate exemplary modes of operation of the chilled water storage air conditioning system of the present invention. As can be seen from the specific examples described above, the system of the present invention is adaptable to a variety of user load requirements. For example, when the cold discharge requirement is high, a cold storage water tank and a refrigeration host machine can be used for combined cooling; when the cold discharge requirement is low, a refrigeration host can be used for cold storage and discharge or a cold storage water tank can be used for cold discharge. The flexibility and the adjustability just meet the current expected 'peak shifting and valley filling' power utilization, and the comprehensive efficiency of the system can be further improved on the premise of ensuring the cold accumulation and discharge efficiency of the system, so that the operating cost is effectively controlled.
In summary, the invention has the following advantages: (1) the cold storage water tank and the refrigeration host cooperate to supply cold for users, and the cold discharge capacity of the refrigeration host and the cold storage water tank can be reasonably distributed, so that the cold discharge capacity utilization rate and the cold discharge efficiency of the cold storage water tank are improved; (2) the cold supply by adopting the mode of mixing the user backwater and the chilled water of the cold storage water tank not only can realize cold discharge which is more matched with the load of a user, but also can effectively reduce the pressure difference of the hot end of the cold storage water tank, further reduce the fault rate of related valves and effectively control the operation and maintenance cost of the system; (3) the system of the invention improves the cold accumulation and the cold discharge efficiency and simultaneously cancels the plate heat exchanger, thereby reducing the cost of the whole system and improving the space utilization rate. The chilled water storage air conditioning system has high efficiency, high flexibility and low cost; the system operation method is convenient to implement and simple, convenient and effective to operate.
Claims (10)
1. The chilled water storage air conditioning system for direct cold storage and mixed cold discharge comprises a refrigeration host (1), a cold storage water tank (2), a chilled water circulating pump (3), a chilled water supply pump (4), a cold discharge pump (5), a first stop valve V1, a second stop valve V2 and a third stop valve V3; the outlet of the chilled water circulating pump (3) is connected with the inlet of the refrigeration host (1) through the first stop valve V1, one path of the outlet of the refrigeration host (1) is connected with the inlet of the chilled water supply pump (4) through the second stop valve V2, and the other path of the outlet of the refrigeration host is connected with the cold end of the cold accumulation water tank (2) through the third stop valve V3; the hot end of the cold accumulation water tank (2) is connected with the inlet of the chilled water circulating pump (3), the cold end of the cold accumulation water tank (2) is also provided with a mixed cooling bypass, the mixed cooling bypass is provided with the cooling pump (5), the outlet of the cooling pump (5) is connected with the inlet of the chilled water supply pump (4),
the mixed chilled water circulation system is characterized in that a mixing valve (6) is further arranged on the mixed cold discharging bypass, the mixing valve (6) is connected with a flow dividing valve (7), a water collecting cylinder (8) for storing user return water is connected to an inlet of the flow dividing valve (7), an outlet of the mixing valve (6) is connected with an inlet of a cold discharging pump (5), an inlet of the mixing valve (6) is respectively connected with a cold end of the cold storage water tank (2) and a first outlet of the flow dividing valve (7) to mix chilled water released by the cold storage water tank (2) and a part of the user return water to form mixed chilled water for supplying cold to a user.
2. The chilled water storage air conditioning system with direct cold storage and mixed cold discharge as claimed in claim 1, characterized in that the second outlet of the flow dividing valve (7) is connected with the hot end of the cold storage water tank (2) and the inlet of the chilled water circulating pump (3), respectively.
3. The chilled water storage air conditioning system for direct and hybrid cold storage according to claim 1 or 2, characterized in that the refrigeration main (1) comprises at least two water coolers between which at least one regulating valve V4 is provided.
4. The operation method of the water cold accumulation air-conditioning system with direct cold accumulation and mixed cold discharge is characterized in that the operation method comprises a cold accumulation working condition of a refrigeration host and a mixed cold discharge working condition of a cold accumulation water tank; wherein,
the cold accumulation working condition of the refrigeration host comprises: the method comprises the steps that a chilled water supply pump (4), a flow dividing valve (7), a mixing valve (6) and a cold discharging pump (5) are closed, a chilled water circulating pump (3), a refrigeration host (1), a cold accumulation water tank (2), a first stop valve V1, a second stop valve V2 and a third stop valve V3 are opened, and the refrigeration host (1) supplies chilled water to the cold accumulation water tank (2) through the second stop valve V2 and the third stop valve V3;
the cold accumulation basin mixes puts cold operating mode and includes: close chilled water circulating pump (3), refrigeration host (1) first stop valve V1 second stop valve V2 with third stop valve V3 opens cold-storage basin (2) chilled water feed pump (4) flow divider (7) mixing valve (6) with put cold pump (5), the chilled water that the cold junction of cold-storage basin (2) was emitted with come from form mixed chilled water after partly mixing of the user's return water of flow divider (7), mixed chilled water warp put cold pump (5) with chilled water feed pump (4) supplies cold for the user.
5. Method of operating a direct cold storage and hybrid cold discharge chilled water storage air conditioning system according to claim 4, characterized in that in the cold storage tank hybrid cold discharge operating condition, another part of the user's return water from the diverter valve (7) enters the hot end of the cold storage tank (2).
6. The operation method of the chilled water storage air conditioning system with direct cold storage and mixed cold discharge as claimed in claim 4 or 5, further comprising the working condition of cold storage water tank and refrigeration host combined cold discharge: closing the third cut-off valve V3; the mixed chilled water flows through the refrigerating pump (5) and then is mixed with chilled water from the refrigerating main machine (1), and then the chilled water is supplied to a user through the chilled water supply pump (4).
7. The method of operating a direct cold storage and hybrid cold discharge chilled water storage air conditioning system of claim 6,
the cold storage water tank is characterized in that in the cold storage water tank and refrigeration host combined cooling working condition, the other part of user backwater from the flow dividing valve (7) respectively enters the hot end of the cold storage water tank (2) and enters the refrigeration host (1) through the chilled water circulating pump (3).
8. The operation method of the chilled water storage air conditioning system with direct cold storage and mixed cold discharge according to claim 4 or 5, characterized in that the operation method further comprises the working conditions of cold storage and cold discharge of a refrigeration main machine: close flow divider (7), mixing valve (6) and put cold pump (5), open refrigerated water circulating pump (3), refrigeration host computer (1), cold-storage basin (2), refrigerated water supply pump (4), first stop valve V1, second stop valve V2 and third stop valve V3, the refrigerated water of refrigeration host computer (1) output passes through respectively second stop valve V2 with third stop valve V3 provides refrigerated water and warp cold-storage basin (2) supply cold for the user with refrigerated water supply pump (4).
9. The operation method of the chilled water storage air conditioning system with direct cold storage and mixed cold discharge according to claim 8, characterized in that in the cold storage and discharge working condition of the refrigeration host, another part of the user backwater from the flow dividing valve (7) and the hot end outlet water of the cold storage water tank (2) enter the refrigeration host through the chilled water circulating pump (3).
10. The operation method of the direct cold storage and mixed cold discharge chilled water storage air conditioning system according to claim 4 or 5, characterized in that the operation method further comprises a refrigeration main machine cold discharge working condition: close cold-storage basin (2), third stop valve V3, blend valve (6) and put cold pump (5), open refrigeration host computer (1), refrigerated water circulating pump (3), refrigerated water supply pump (4), flow divider (7), first stop valve V1 and second stop valve V2, the refrigerated water warp of refrigeration host computer (1) output refrigerated water supply pump (4) are the user and supply cold, come from the user's return water warp of flow divider (7) refrigerated water circulating pump (3) get into refrigeration host computer (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210069871XA CN102538111B (en) | 2012-03-16 | 2012-03-16 | Water cold accumulation air conditioning system for direct cold accumulation and mixed cold discharge and running method thereof |
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| CN107110567A (en) * | 2014-12-23 | 2017-08-29 | 特灵空调系统(中国)有限公司 | Humidity control system and its control method |
| CN106500216A (en) * | 2016-11-07 | 2017-03-15 | 深圳市奥宇节能技术股份有限公司 | A kind of water cold storage central air conditioner system and optimal control method |
| CN106958899A (en) * | 2017-05-10 | 2017-07-18 | 郑州云海信息技术有限公司 | A kind of water storage cooling system and its method of operation for data center |
| CN107477735A (en) * | 2017-07-21 | 2017-12-15 | 深圳达实智能股份有限公司 | Chilled water storage system |
| CN109539434A (en) * | 2018-10-29 | 2019-03-29 | 珠海格力电器股份有限公司 | Ice storage air conditioning system and control method thereof |
| CN109945364A (en) * | 2019-03-25 | 2019-06-28 | 珠海格力电器股份有限公司 | Air conditioner and control method thereof |
| CN112178846A (en) * | 2020-09-24 | 2021-01-05 | 北京佩尔优能源科技有限公司 | Air conditioning system and control method thereof |
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| CN100516675C (en) * | 2007-06-22 | 2009-07-22 | 广州贝龙环保热力设备股份有限公司 | Direct cool water supply cool-storage air conditioner system and its operation method |
| CN102345910B (en) * | 2010-08-06 | 2013-12-25 | 同方节能工程技术有限公司 | Water cool storage air conditioning system with indirect cool storage |
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