CN219976602U - Water-cooling multi-connected air conditioning system for subway station - Google Patents
Water-cooling multi-connected air conditioning system for subway station Download PDFInfo
- Publication number
- CN219976602U CN219976602U CN202321463075.4U CN202321463075U CN219976602U CN 219976602 U CN219976602 U CN 219976602U CN 202321463075 U CN202321463075 U CN 202321463075U CN 219976602 U CN219976602 U CN 219976602U
- Authority
- CN
- China
- Prior art keywords
- water
- cooling
- pipeline
- air conditioner
- split
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 155
- 238000004378 air conditioning Methods 0.000 title claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 192
- 239000000498 cooling water Substances 0.000 claims abstract description 137
- 238000010438 heat treatment Methods 0.000 claims description 24
- 238000010992 reflux Methods 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 abstract description 3
- 238000005057 refrigeration Methods 0.000 description 10
- 238000010276 construction Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Landscapes
- Other Air-Conditioning Systems (AREA)
Abstract
The utility model relates to the technical field of subway air conditioner adjustment, and discloses a water-cooling multi-connected air conditioning system for a subway station. The system comprises: and (3) a water inlet system: the closed cooling tower is connected with a cooling water pump set through a main water inlet pipeline, and the cooling water pump set is connected with at least one water-cooling direct expansion combined air conditioner through a water inlet pipeline at the tail end of the main water inlet pipeline to form a large-system air conditioner; the cooling water pump set is connected with the water-cooling multi-split outdoor unit through a water inlet branch pipeline, and the water-cooling multi-split outdoor unit is connected with the multi-split indoor unit to form a small-system air conditioner; and (3) a water return system: the water-cooled direct expansion combined air conditioner and the water-cooled multi-split outdoor unit are connected with a heat pump hot water unit through a water return pipeline, and the heat pump hot water unit is connected with a closed cooling tower. The utility model solves the problems of serious loss and high power consumption of equipment operation caused by the fact that the existing subway station internal energy system cannot carry out complementary adjustment on the generated residual heat or residual cold, and the loss is lower by using the water-cooled multi-connected cooling water system for carrying out temperature complementary adjustment.
Description
Technical Field
The utility model relates to the technical field of subway air conditioner adjustment, in particular to a water-cooling multi-connected air conditioning system of a subway station.
Background
At present, a subway station is generally provided with a water-cooling chiller, a closed cooling tower, a cooling water pump, a combined air conditioner set and the like to form a primary return air all-air conditioning system, and a station hall and a station public area are provided with a combined air conditioner set and a return air exhaust set double-fan system, namely a large-system air conditioner; the station personnel management room water-cooling multi-split outdoor unit, the strong and weak electricity equipment control room water-cooling multi-split outdoor unit and the substation equipment room water-cooling multi-split outdoor unit respectively adopt three independent combined air conditioning units and a back-exhaust fan double-fan system, namely a small-system air conditioner for short. The large-system air conditioner and the small-system air conditioner both adopt full-air systems, the size of the air pipe is larger, the influence on the layer height in the station is larger, the scale and investment of the station are increased, the installation difficulty in the construction stage is increased, and the workload of later operation and overhaul is also larger.
Meanwhile, a small system air conditioner of a subway station generally adopts a multi-split system, and two air conditioning modes of air-cooled multi-split and water-cooled multi-split are available at present. The air-cooled multi-split air conditioner is widely applied to urban rail transit small systems and is generally used as a standby air-conditioning system, but the outdoor units of the air-cooled multi-split air conditioner are difficult to arrange, the outdoor landscape effect is affected, the problems of serious loss of refrigerating capacity caused by overrun of the pipeline length of the indoor and outdoor units and the like are solved, and the wide application of the air-cooled multi-split air conditioner in subway stations is limited.
The utility model with the publication number of CN206803364U discloses a subway distributed air conditioning system, wherein a refrigerating host and an air conditioner are combined, the system is arranged in a scattered way, so that the installation capacity of a compressor is smaller, waste heat in a cooling water loop is not recovered, the COP value is relatively lower, the electric installation capacity of the whole air conditioning system is relatively larger, and domestic hot water in a shower room and a toilet of a subway station is prepared by adopting an electric heater at present, the waste heat of the air conditioning system is not fully utilized, the unreasonable energy structure is caused, and the series of problems prevent the water-cooling multi-connected air conditioning system from being widely applied to the subway station.
In summary, how to solve the problems that the existing subway station actively and uniformly supplies heat or cold to office rooms or equipment rooms by adopting air cooling under the conditions of different seasons and limited space of the subway station, and the generated residual heat or residual cold cannot be linked to supplement and regulate the required temperature in different rooms, so that the existing air conditioning equipment is unreasonable in structure, overlarge in construction occupied area, serious in refrigeration or heating loss and high in equipment operation power consumption.
Disclosure of Invention
Aiming at the technical problems, the utility model aims to provide a water-cooling multi-connected air conditioning system for a subway station, so as to solve the technical problems in the background art; in order to achieve the above purpose, the present utility model provides the following technical solutions: a water-cooling multi-connected air conditioning system of a subway station comprises a water inlet system and a water return system;
the water inlet system comprises: the closed cooling tower is connected with a cooling water pump set through a main water inlet pipeline, and the cooling water pump set is connected with at least one water-cooled direct expansion combined air conditioner through a water inlet pipeline at the tail end of the main water inlet pipeline to form a large-system air conditioner; the cooling water pump set is connected with the water-cooling multi-split outdoor unit through a water inlet branch pipeline, and the water-cooling multi-split outdoor unit is connected with the multi-split indoor unit to form a small-system air conditioner; the water inlet pipeline is also connected with a water return pipeline to form reflux;
the backwater system comprises: the water-cooled direct expansion combined air conditioner and the water-cooled multi-split outdoor unit are connected with a heat pump hot water unit through a water return pipeline, and the heat pump hot water unit is connected with a closed cooling tower.
Preferably, a bypass pipeline is further arranged on the closed cooling tower, and the bypass pipeline is connected with a water return pipeline to form self circulation.
Preferably, the cooling water pump group is composed of three cooling water pumps in parallel connection, and the cooling water pumps can be independently started or stopped.
Preferably, the cooling water pump set is connected with at least two water-cooling direct expansion combined air conditioners through the main water inlet pipeline.
Preferably, the water-cooling multi-split outdoor unit comprises three water-cooling multi-split outdoor units in a parallel state, and each water-cooling multi-split outdoor unit is connected with at least one multi-split indoor unit.
Preferably, the heat pump water heater unit has at least two, and heat pump water heater unit includes heat pump water heater and hot water tank, and heat pump water heater can follow the return water pipeline heat absorption, and the circulating water in the circulating water pipeline is heated to the heat pump water heater, and the circulating water pipeline is the self-circulation pipeline on the hot water tank.
Preferably, a cooling water supply temperature measuring point is arranged on the main water inlet pipeline between the closed cooling tower and the cooling water pump set, and a cooling water loop flow measuring point is arranged on the main water inlet pipeline connected with the water outlet of the cooling water pump set.
Preferably, electric butterfly valves are respectively arranged between the cooling water pump group and the water-cooled direct expansion combined air conditioner, between two adjacent water-cooled multi-split outdoor units and on a water inlet main pipeline connected with a water return pipeline.
Preferably, a cooling water backwater temperature measuring point and an electric butterfly valve are sequentially arranged on a backwater pipeline between the heat pump hot water unit and the closed cooling tower.
Compared with the prior art, the utility model has the beneficial effects that:
the water-cooling multi-connected device is applied to the small-system air conditioner of the subway station, and the large-system air conditioner and the small-system air conditioner are arranged in parallel through the water inlet pipeline and the water return pipeline, so that the COP of refrigeration of the large-system air conditioner and the small-system air conditioner is improved.
In winter, the utility model switches through the electric butterfly valve on the cooling water loop (the main water inlet pipeline, the bypass pipeline and the water return pipeline), selectively adjusts according to different seasons and different requirements of rooms, increases heat exchange efficiency and improves COP of the multi-split outdoor unit; the multi-split air conditioner outdoor unit of the room water-cooling multi-split air conditioner for personnel management absorbs heat to the cooling water loop, reduces the average water temperature of the whole cooling water loop, improves the COP of the whole air conditioning system, and reduces the condensation load of the closed cooling tower.
According to the utility model, two sets of heat pump water heaters are arranged in series at the downstream of the cooling water loop outside the large and small system air conditioners, the refrigerating air conditioner releases heat to the cooling water loop, and the heat pump water heaters and the heating air conditioner absorb heat from the cooling water loop, so that the COP of the heat pump water heaters is improved, and the power consumption is reduced; the heat pump water heater absorbs the residual heat in the cooling water loop, reduces the average water temperature in the cooling water loop, balances the cold and hot heat in the cooling water loop, improves the COP of the whole air conditioning system, and reduces the heat radiation load of the closed cooling tower and the power consumption of the whole system.
According to the utility model, two closed cooling towers are arranged in the cooling water loop, and the closed cooling towers are connected into the cooling water loop at the same time, so that the cooling water is not in direct contact with outdoor air, the quality of the cooling water is ensured, and the cleaning and maintenance workload of a heat exchanger in the cooling water loop is reduced. Meanwhile, a bypass pipeline is arranged between the closed cooling tower and the cooling water loop, and electric butterfly valves are arranged between the bypass pipeline and the water inlet and outlet pipes of the closed cooling tower, so that when no residual heat exists in the cooling water loop, the closed cooling tower can be closed, the resistance of the cooling water loop is reduced, the lift of the cooling water pump is reduced, and the power consumption of the system is saved; when the residual heat exists in the cooling water loop, the closed cooling tower is connected in series in the cooling water loop by switching the electric butterfly valve so as to remove the residual heat in the cooling water loop.
The utility model adopts water cooling for adjustment, and selectively switches the cooling water loop through different seasons to carry out complementary adjustment on temperature difference required by different scenes, so as to solve the problems of serious refrigeration or heating loss and high running power consumption of air cooling equipment; meanwhile, the water cooling equipment is adopted for construction, so that the required occupied area is ensured to be smaller, the construction is easy to implement under the condition of limited space of a subway station, the structure is more reasonable, and the refrigerating or heating effect is better.
Drawings
Fig. 1 is a schematic layout diagram of a water-cooled multi-connected air conditioning system for a subway station.
In the figure: 1. a closed cooling tower; 2. a cooling water pump; 3. water-cooled direct expansion combined air conditioner; 4-1, a strong and weak electric equipment control room water-cooling multi-split outdoor unit; 4-2, a room water-cooling multi-split outdoor unit for substation equipment; 4-3, a room water-cooling multi-split outdoor unit for personnel management; 5-1, a strong and weak current equipment control room water-cooling multi-split indoor unit; 5-2, a room water-cooling multi-split indoor unit for substation equipment; 5-3, a room water-cooling multi-split indoor unit for personnel management; 6. a shower room heat pump water heater; 7. a domestic hot water tank for the shower room; 8. passenger toilet heat pump water heater; 9. a living hot water tank for a passenger toilet; 10-1, measuring a water supply temperature of cooling water; 10-2, measuring a temperature point of return water of cooling water; 11. cooling water loop flow measuring points; 12. an electric butterfly valve; 13. a controller; 14. a main water inlet pipe; 15. a water inlet pipeline; 16. a water return pipe; 17. a circulating water pipe; 18. a bypass conduit.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "configured" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Hereinafter, an embodiment of the present utility model will be described in accordance with its entire structure.
Referring to fig. 1, the present utility model is directed to a water-cooled multi-connected air conditioning system for a subway station. The subway station water-cooling multi-connected air conditioning system comprises: the large-system air conditioner adopts a water-cooling direct expansion combined air conditioner 3, the small-system air conditioner adopts a water-cooling multi-connected unit, and the large-system air conditioner and the small-system air conditioner share a set of cooling water system.
The utility model provides the following technical scheme: a water-cooling multi-connected air conditioning system of a subway station comprises a water inlet system and a water return system;
the water inlet system comprises: at least one closed cooling tower 1, wherein the closed cooling tower 1 is connected with a cooling water pump set through a main water inlet pipeline 14, and the cooling water pump set is connected with at least one water-cooled direct expansion combined air conditioner 3 through a water inlet branch pipeline 15 at the tail end of the main water inlet pipeline 14 to form a large-system air conditioner; the cooling water pump set is connected with a water-cooling multi-split outdoor unit through a water inlet pipeline 15, and the water-cooling multi-split outdoor unit is connected with a water-cooling multi-split indoor unit to form a small-system air conditioner; the water inlet pipeline 15 is also connected with a water return pipeline 16 to form reflux;
the backwater system comprises: the water-cooled direct expansion combined air conditioner 3 and the water-cooled multi-split air conditioner outdoor unit are connected with a heat pump hot water unit through a return water pipeline 16, and the heat pump hot water unit is connected with the closed cooling tower 1.
In another preferred embodiment, a bypass pipeline 18 is further arranged on the closed cooling tower 1, and the bypass pipeline 18 is connected with the return pipeline 16 to form self circulation.
In another preferred embodiment, the cooling water pump group is composed of three cooling water pumps 2 in parallel connection, and the cooling water pumps 2 can be independently turned on or turned off.
In another preferred embodiment, the cooling water pump set is connected to at least two water-cooled direct expansion combined air conditioners 3 through a main water inlet pipe 14.
In another preferred embodiment, the water-cooled multi-split outdoor unit comprises three water-cooled multi-split outdoor units in parallel connection, namely a strong and weak electricity equipment control room water-cooled multi-split outdoor unit 4-1, a power substation equipment room water-cooled multi-split outdoor unit 4-2 and a personnel management room water-cooled multi-split outdoor unit 4-3, which are respectively and correspondingly connected with a strong and weak electricity equipment control room water-cooled multi-split indoor unit 5-1, a power substation equipment room water-cooled multi-split indoor unit 5-2 and a personnel management room water-cooled multi-split indoor unit 5-3.
In another preferred embodiment, at least two heat pump water heating units are provided, and each heat pump water heating unit comprises a shower room heat pump water heater 6 and a shower room living hot water tank 7; the system comprises a passenger bathroom heat pump water heater 8 and a passenger bathroom domestic hot water tank 9, wherein a water return pipeline 16 and a circulating pipeline 17 are arranged in each heat pump water heater, the circulating pipeline 17 is a self-circulating pipeline on two domestic hot water tanks, and the circulating pipeline 17 is not communicated with the water return pipeline 16; each heat pump water heater can absorb heat from the water return pipeline 16, each heat pump water heater heats circulating water in the circulating water pipeline, and the circulating water pipeline 17 is a self-circulating pipeline on each hot water tank.
In another preferred embodiment, a main water inlet pipe 14 between the closed cooling tower 1 and the cooling water pump set is provided with a cooling water supply temperature measuring point 10-1, and a main water inlet pipe 14 connected with a water outlet of the cooling water pump set is provided with a cooling water loop flow measuring point 11.
In another preferred embodiment, electric butterfly valves 12 are respectively arranged between the cooling water pump set and the water-cooled direct expansion combined air conditioner 3, between two adjacent water-cooled multi-split air conditioner outdoor units and on a water inlet main pipeline 14 connected with a water return pipeline 16, wherein the two water-cooled multi-split air conditioner outdoor units are a room water-cooled multi-split air conditioner outdoor unit 4-2 outdoor unit for substation equipment and a person management room water-cooled multi-split air conditioner outdoor unit 4-3.
In another preferred embodiment, a cooling water return temperature measuring point 10-2 and an electric butterfly valve 12 are sequentially arranged on a return water pipeline 16 between the heat pump water heating unit and the closed cooling tower 1.
In the system, the cooling water loops of the large system air conditioner and the small system air conditioner are arranged in parallel so that the outlet water (low-temperature water) of the closed cooling tower 1 enters the large system air conditioner and the small system air conditioner simultaneously, the heat exchange efficiency of the condenser and the cooling water is increased, and the COP of the large system air conditioner and the small system air conditioner for refrigeration is improved.
Meanwhile, the cooling water loops of the small system air conditioner in the cooling water loops are divided into 3 groups, in the small system air conditioner in summer, 3 groups of water-cooling multi-split air conditioner are used for simultaneously refrigerating, the cooling water loops of the 3 groups of water-cooling multi-split air conditioner are arranged in parallel, and water (low-temperature water) discharged from the closed cooling tower 1 is connected in parallel to the 3 groups of water-cooling multi-split air conditioner; small system air conditioner in winter. The 2 groups of water-cooling multi-split air conditioners (a strong and weak electric equipment control room water-cooling multi-split air conditioner outdoor unit 4-1 and a power substation equipment room water-cooling multi-split air conditioner outdoor unit 4-2 outdoor units) are in a refrigerating working condition, the other group of personnel management room water-cooling multi-split air conditioner outdoor units 4-3 heat, the 2 groups of cooling water loops of the refrigerating water-cooling multi-split air conditioners are switched through electric butterfly valves 12 in pipelines, then the 2 groups of cooling water loops are connected in parallel with the 1 group of personnel management room water-cooling multi-split air conditioners 4-3 in series with the cooling water loops, water (low temperature water) discharged from a closed cooling tower firstly enters the 2 groups of parallel water-cooling multi-split air conditioners, cooling water in the cooling water loops absorbs heat of the 2 groups of water-cooling multi-split air conditioners, after the water temperature of the cooling water loops rises, the water-cooling multi-split air conditioners in the cooling water loops of the 1 group of heating working conditions absorb heat in the cooling water loops, heat absorption efficiency is increased, evaporation temperature rises, and COP (coefficient of the water-cooling multi-split air conditioners outdoor units of heating working conditions is improved; the room water-cooling multi-split air conditioner outdoor unit 4-3 for personnel management absorbs heat to the cooling water loop in winter, reduces the average water temperature of the whole cooling water loop, improves the COP of the whole air conditioning system, and reduces the condensation load of the closed cooling tower 1.
In the system, two sets of heat pump water heaters are arranged in the cooling water loop in series at the downstream of the cooling water loop of the large and small system air conditioners, the water in the cooling water loop is subjected to the large and small system air conditioners, so that the cold and hot energy demands of the large and small system air conditioners are preferentially met, and the water in the cooling water loop is heated and sequentially enters the shower room heat pump water heater 6 and the passenger toilet heat pump water heater 8. The heat pump water heater unit absorbs the residual heat in the cooling water loop, reduces the average water temperature in the cooling water loop, balances the cold and hot heat in the cooling water loop, improves the COP of the whole air conditioning system, and reduces the heat radiation load of the closed cooling tower 1 and the power consumption of the cooling water system.
In the cooling water loop, two closed cooling towers 1 are arranged, the closed cooling towers 1 are connected in parallel and then connected in series in the cooling water loop, air and water reversely flow, the heat exchange flow is good, cooling water is not in direct contact with outdoor air, the water quality of the cooling water is ensured, and the cleaning and maintenance workload of a heat exchanger in the cooling water loop is reduced. Meanwhile, a bypass pipeline 18 is arranged on the closed cooling tower 1 and the cooling water loop, an electric butterfly valve 12 is arranged on the bypass pipeline 18 and the water inlet and outlet pipes of the closed cooling tower 1, when no residual heat exists in the cooling water loop, the closed cooling tower 1 can be closed, the resistance of the cooling water loop is reduced, the lift of the cooling water pump 2 is reduced, and the power consumption of a cooling water system is saved; when the residual heat exists in the cooling water loop, the closed cooling tower 1 is connected in series in the cooling water loop by switching the electric butterfly valve 12 so as to remove the residual heat in the cooling water loop.
In the working process of the water-cooling multi-connected air conditioning system of the subway station (when the cooling water loop has residual heat), the cooling water in the closed cooling tower 1 arranged outside the subway station is driven by the cooling water pump 2, the cooling water firstly passes through the water-cooling direct expansion combined air conditioning unit in the large-system air conditioner and the water-cooling multi-connected unit of the small-system air conditioner, after the condensing heat of the air conditioner in the large-system air conditioner is absorbed, the two sets of heat pump water heaters at the downstream of the cooling water loop work, the heat in the cooling water loop is absorbed, the living hot water is prepared, the living hot water is respectively supplied to a shower room and a passenger toilet, the water in the cooling water loop returns to the closed cooling tower 1, the residual heat is released, and the cooling water loop completes one cycle.
The working process of the utility model is as follows: the closed cooling tower 1 prepares cooling water with lower temperature, and the cooling water is driven to circulate in a cooling water loop through the cooling water pump 2. When the water-cooled direct expansion combined air conditioner 3 in the large system air conditioner starts a refrigerating mode, the heat of the condenser is exchanged into a cooling water loop through heat exchange; the outdoor unit 4-1 of the room-cooling multi-split air conditioner for controlling strong and weak current equipment and the outdoor unit 4-2 of the room-cooling multi-split air conditioner for controlling electric substation are in a year-round starting refrigeration mode, heat of a condenser is exchanged into a cooling water loop through heat exchange, the outdoor unit 4-3 of the room-cooling multi-split air conditioner for managing personnel is refrigerated in summer, condensation heat is released into the cooling water loop through heat exchange, and heat is absorbed from the cooling water loop through heat exchange during heating in winter, and the indoor unit 5-1 of the room-cooling multi-split air conditioner for controlling strong and weak current equipment, the indoor unit 5-2 of the room-cooling multi-split air conditioner for controlling electric substation, the indoor unit 5-3 of the room-cooling multi-split air conditioner for managing personnel, the outdoor unit 4-2 of the room-cooling multi-split air conditioner for controlling electric substation and the outdoor unit 4-3 of the room-cooling multi-split air conditioner for managing personnel are respectively connected with the corresponding indoor unit 4-1 of the room-cooling multi-split air conditioner for controlling strong and weak current equipment; starting the same mode to cool or heat the room; the shower room heat pump water heater 6 positioned at the downstream of the cooling water loop is in a heating mode for years and intermittently works, the prepared domestic hot water is stored in the shower room domestic hot water tank 7, and the shower room heat pump water heater 6 stops running after the water temperature of the tank reaches the set temperature; the passenger toilet heat pump water heater 8 positioned at the downstream of the cooling water loop is always in a heating mode, the running time is consistent with the subway running time, the prepared domestic hot water is stored in the passenger toilet domestic hot water tank 9, and the passenger toilet heat pump water heater 8 stops running after the water temperature of the tank reaches the set temperature.
The control system is provided with the monitoring device for the outdoor temperature and the enthalpy value, when the outdoor enthalpy value is larger than the indoor enthalpy value, the whole system enters a small fresh air conditioning mode, and all equipment and accessories in the system execute corresponding commands; in the daytime running period, the water-cooled direct expansion combined air conditioner 3, the strong and weak electric equipment control room water-cooled multi-split outdoor unit 4-1, the substation equipment room water-cooled multi-split outdoor unit 4-2 and the personnel management room water-cooled multi-split outdoor unit 4-3 all execute a refrigeration mode, and the shower room heat pump water heater 6 and the passenger toilet heat pump water heater 8 execute heating modes to prepare domestic hot water; in the night operation stopping stage, the water-cooled direct expansion combined air conditioner 3 in the large system air conditioner and the room water-cooled multi-split air conditioner for personnel management 4-3 stop running, and other systems do not act.
When the outdoor enthalpy value is smaller than the indoor enthalpy value and the outdoor temperature is larger than the indoor temperature, the system executes a full fresh air conditioning mode, a daytime operation period is shortened, a water-cooling direct expansion combined air conditioner 3 in a large system air conditioner is started, a full fresh air mode is adopted, three sets of small system air conditioner strong and weak current equipment control room water-cooling multi-split outdoor units 4-1, power substation equipment room water-cooling multi-split outdoor units 4-2 and personnel management room water-cooling multi-split outdoor units 4-3 execute a refrigeration mode, and a shower room heat pump water heater 6 and a passenger toilet heat pump water heater 8 execute a heating mode to prepare domestic hot water; in the night operation stopping stage, the water-cooled direct expansion combined air conditioner 3 in the large system air conditioner and the room water-cooled multi-split air conditioner for personnel management 4-3 stop running, and other systems do not act.
When the outdoor temperature is lower than the indoor temperature, the system enters a ventilation working condition, the system operates in the daytime, the water-cooled direct expansion combined air conditioner 3 in the large system air conditioner passes through a bypass air path, air supply does not pass through a surface air cooler, only a fan is started for ventilation, cooling water does not pass through the water-cooled direct expansion combined air conditioner 3 in the large system air conditioner any more, in the small system air conditioner, strong and weak electric equipment control room water-cooled multi-connected air conditioners 4-1, power substation equipment room water-cooled multi-connected air conditioners 4-2, personnel management room water-cooled multi-connected air conditioners 4-3, a heating mode is started according to personnel requirements, the water-cooled multi-connected air conditioners are converted into a heating mode through four-way reversing valves, the outdoor machines absorb heat from a cooling water loop, and a shower room heat pump water heater 6 and a passenger toilet heat pump water heater 8 execute heating mode to prepare domestic hot water; and in the operation stopping stage at night, the fan of the water-cooling direct expansion combined air conditioner 3 in the large-system air conditioner is also closed, the water-cooling multi-split air conditioner for personnel management 4-3 stops running, and other systems do not act.
The control flow of the subway station water-cooling multi-connected air conditioning system is as follows:
in summer air conditioning season, daytime operation period, larger total cold load of stations, large-system air conditioning, three sets of small-system air conditioning (a strong and weak electric equipment control room water-cooling multi-split outdoor unit 4-1, a substation equipment room water-cooling multi-split outdoor unit 4-2 and a personnel management room water-cooling multi-split outdoor unit 4-3) are in a refrigeration mode, at the moment, a shower room heat pump water heater 6 and a passenger toilet heat pump water heater 8 are used for preparing domestic hot water, and residual heat in a cooling water loop is discharged by a closed cooling tower 1; in the stage of stopping operation of the subway at night, the large system air conditioner stops operation, two sets of small system air conditioners (the room water-cooling multi-split outdoor unit 4-1 for controlling strong and weak electric equipment and the room water-cooling multi-split outdoor unit 4-2 for controlling substation equipment) are in a refrigerating mode, the room water-cooling multi-split outdoor unit 4-3 for personnel management stops operation, the shower room heat pump water heater 6 is in a heating mode, and the passenger toilet heat pump water heater 8 stops operation.
In a transitional season and a daytime operation period, the total cold load of a station is small, a full fresh air mode is adopted by a large system air conditioner, three sets of small system air conditioners (a strong and weak electricity equipment control room water-cooling multi-split outdoor unit 4-1, a power substation equipment room water-cooling multi-split outdoor unit 4-2 and a personnel management room water-cooling multi-split outdoor unit 4-3) are in a refrigeration mode, at the moment, a shower room heat pump water heater 6 and a passenger toilet heat pump water heater 8 are used for preparing domestic hot water, and residual heat in a cooling water loop is discharged by a closed cooling tower 1; in the night operation stopping stage, the large system air conditioner stops running, two sets of small system air conditioners (the strong and weak electric equipment control room water-cooling multi-split outdoor unit 4-1 and the substation equipment room water-cooling multi-split outdoor unit 4-2) are in a refrigerating mode, the personnel management room water-cooling multi-split outdoor unit 4-3 small system air conditioner stops running, the shower room heat pump water heater 6 is in a heating mode, and the passenger toilet heat pump water heater 8 stops running.
In a ventilation season, the outdoor air temperature and enthalpy values are lower, a daytime operation period is shortened, a large system air conditioner adopts a ventilation mode, cooling water does not pass through the large system air conditioner any more, two sets of small system air conditioners (a strong and weak electric equipment control room water-cooling multi-split outdoor unit 4-1 and a substation equipment room water-cooling multi-split outdoor unit 4-2) are in a refrigeration mode, a personnel management room water-cooling multi-split outdoor unit 4-3 is converted into a heating mode through a four-way reversing valve, the personnel management room water-cooling multi-split outdoor unit 4-3 absorbs heat from a cooling water loop, an electric butterfly valve 12 is used for switching the personnel management room water-cooling multi-split outdoor unit 4-3 to be positioned at the downstream of the strong and weak electric equipment control room water-cooling multi-split outdoor unit 4-1 and the substation equipment room water-cooling multi-split outdoor unit 4-2 in the cooling water loop, heat exchange is more sufficient, at the moment, a shower room heat pump water heater 6 and a passenger toilet heat pump water heater 8 prepare domestic hot water, and residual heat in the cooling water loop is discharged by a closed cooling tower 1; in the stage of stopping operation of the subway at night, the large system air conditioner stops operation, two sets of small system air conditioners (the room water-cooling multi-split outdoor unit 4-1 for controlling strong and weak electric equipment and the room water-cooling multi-split outdoor unit 4-2 for controlling substation equipment) are in a refrigerating mode, the room water-cooling multi-split outdoor unit 4-3 for personnel management stops operation, the shower room heat pump water heater 6 is in a heating mode, and the passenger toilet heat pump water heater 8 stops operation.
In summary, the utility model provides a subway station water-cooling multi-connected air conditioning system, which is creatively provided for the characteristics of the cold load and the heat load of the subway station, improves the application of a water loop heat pump multi-connected air conditioning system in the subway station, utilizes the residual heat quantity in an air conditioner cooling water loop, reduces the difference of the cold load and the heat load in the cooling water loop, saves the energy consumption of electric heating of domestic hot water and the operation energy consumption of the cooling water system, improves the COP of the air conditioning system, and has larger economic benefit and environmental benefit.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments and that the present utility model may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and accordingly, the embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. The water-cooling multi-connected air conditioning system for the subway station is characterized by comprising a water inlet system and a water return system;
the water intake system includes: the closed cooling tower is connected with a cooling water pump set through a main water inlet pipeline, and the cooling water pump set is connected with at least one water-cooled direct expansion combined air conditioner through a water inlet branch pipeline at the tail end of the main water inlet pipeline to form a large-system air conditioner; the cooling water pump set is connected with the water-cooling multi-split outdoor unit through a water inlet branch pipeline, and the water-cooling multi-split outdoor unit is connected with the multi-split indoor unit to form a small-system air conditioner; the water inlet branch pipeline is also connected with a water return pipeline to form reflux;
the water return system comprises: the water-cooling direct-expansion combined air conditioner and the water-cooling multi-split outdoor unit are connected with a heat pump hot water unit through a water return pipeline, and the heat pump hot water unit is connected with a closed cooling tower.
2. The subway station water-cooling multi-connected air conditioning system according to claim 1, wherein a bypass pipeline is further arranged on the closed cooling tower, and the bypass pipeline is connected with a return water pipeline to form self circulation.
3. The subway station water-cooling multi-connected air conditioning system according to claim 1, wherein the cooling water pump group is composed of three cooling water pumps in parallel connection, and the cooling water pumps can be independently started or stopped.
4. The subway station water-cooling multi-connected air conditioning system according to claim 1, wherein the cooling water pump set is connected with at least two water-cooling direct expansion combined air conditioners through a main water inlet pipeline.
5. The water-cooled multi-connected air conditioning system of claim 1, wherein the water-cooled multi-connected outdoor unit comprises three water-cooled multi-connected outdoor units in parallel, and each water-cooled multi-connected outdoor unit is connected with at least one multi-connected indoor unit.
6. The subway station water-cooling multi-connected air conditioning system according to claim 1, wherein at least two heat pump water heating units are provided, the heat pump water heating units comprise a heat pump water heater and a hot water tank, the heat pump water heater can absorb heat from a water return pipeline, the heat pump water heater heats circulating water in a circulating water pipeline, and the circulating water pipeline is a self-circulating pipeline on the hot water tank.
7. The subway station water-cooling multi-connected air conditioning system according to claim 1, wherein a cooling water supply temperature measuring point is arranged on a main water inlet pipeline between the closed cooling tower and the cooling water pump set, and a cooling water loop flow measuring point is arranged on a main water inlet pipeline connected with a water outlet of the cooling water pump set.
8. The subway station water-cooling multi-connected air conditioning system according to claim 5, wherein electric butterfly valves are respectively arranged between the cooling water pump group and the water-cooling direct expansion combined air conditioner, between two adjacent water-cooling multi-connected outdoor units and on a main water inlet pipeline connected with a water return pipeline.
9. The subway station water-cooling multi-connected air conditioning system according to claim 1, wherein a cooling water return temperature measuring point and an electric butterfly valve are sequentially arranged on a return water pipeline between the heat pump water heating unit and the closed cooling tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321463075.4U CN219976602U (en) | 2023-06-08 | 2023-06-08 | Water-cooling multi-connected air conditioning system for subway station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321463075.4U CN219976602U (en) | 2023-06-08 | 2023-06-08 | Water-cooling multi-connected air conditioning system for subway station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219976602U true CN219976602U (en) | 2023-11-07 |
Family
ID=88579004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321463075.4U Active CN219976602U (en) | 2023-06-08 | 2023-06-08 | Water-cooling multi-connected air conditioning system for subway station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219976602U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116734352A (en) * | 2023-06-08 | 2023-09-12 | 佛山轨道交通设计研究院有限公司 | A water-cooled multi-connected air conditioning system and control method in a subway station |
-
2023
- 2023-06-08 CN CN202321463075.4U patent/CN219976602U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116734352A (en) * | 2023-06-08 | 2023-09-12 | 佛山轨道交通设计研究院有限公司 | A water-cooled multi-connected air conditioning system and control method in a subway station |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202613835U (en) | Simultaneous cold and heat supply energy-saving system | |
| CN100545521C (en) | Solar energy and building integrated composite energy system | |
| CN205505262U (en) | Radiation air -conditioning system | |
| CN107062473A (en) | A kind of solar air source heat pumps combined supply system | |
| CN205079368U (en) | Cold and hot source system of water source VRF air conditioner | |
| CN108834366B (en) | Air conditioning system of data machine room | |
| CN107166801A (en) | Distributed energy resource system of providing multiple forms of energy to complement each other for Constant temperature swimming pool | |
| CN107062472A (en) | Double cold source refrigerating systems that natural cooling unit is combined with centrifugal water chillers | |
| CN104101040B (en) | Efficient and energy-saving water-electricity air-conditioning system and control method thereof | |
| CN108775611B (en) | It comprehensively utilizes clean energy resource and produces the cold-hot combined supply system of waste heat | |
| CN100356113C (en) | Dynamic ice-storage energy saving unit | |
| CN208124530U (en) | Phase-change energy-storage heat pump constant temperature system | |
| CN219976602U (en) | Water-cooling multi-connected air conditioning system for subway station | |
| CN203628881U (en) | Air conditioning device capable of preparing cooling media or heating media and simultaneously processing air heat and humidity loads | |
| CN206572676U (en) | Double cold source refrigerating systems that natural cooling unit is combined with centrifugal water chillers | |
| CN206929902U (en) | A kind of solar air source heat pumps combined supply system | |
| CN102538105A (en) | Air-source water-solution heat pump type refrigerating and heating system of air-conditioner and control method thereof | |
| CN1344896A (en) | Energy saving tripurpose machine for hot and cold air conditioning and supplying hot water | |
| CN201803419U (en) | Integrated type multi-connected cold and hot source central air-conditioning system | |
| CN201285185Y (en) | Heat pump combination type air-conditioner | |
| CN207600014U (en) | The double cold source air conditioners of annual operation of air-cooled compression-type refrigeration and sweat cooling | |
| CN205783497U (en) | A kind of water energy storage system | |
| CN209877194U (en) | Household assembled central air-conditioning system | |
| CN209857281U (en) | Air conditioning system combining evaporation refrigeration and mechanical refrigeration with regional cooling | |
| CN203431984U (en) | Noiseless air condition system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |