CN216924838U - Cold and heat source system based on phase change cold accumulation and heat accumulation combined cooling tower - Google Patents
Cold and heat source system based on phase change cold accumulation and heat accumulation combined cooling tower Download PDFInfo
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- CN216924838U CN216924838U CN202220230777.7U CN202220230777U CN216924838U CN 216924838 U CN216924838 U CN 216924838U CN 202220230777 U CN202220230777 U CN 202220230777U CN 216924838 U CN216924838 U CN 216924838U
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- 230000008859 change Effects 0.000 title claims abstract description 132
- 238000001816 cooling Methods 0.000 title claims abstract description 96
- 238000009825 accumulation Methods 0.000 title claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 206
- 238000005338 heat storage Methods 0.000 claims abstract description 48
- 230000001105 regulatory effect Effects 0.000 claims description 118
- 239000000498 cooling water Substances 0.000 claims description 13
- 238000009833 condensation Methods 0.000 abstract description 13
- 230000005494 condensation Effects 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004378 air conditioning Methods 0.000 description 31
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The utility model relates to a cold and heat source system based on a phase change cold accumulation and heat accumulation combined cooling tower, which comprises a cooling tower, an inner zone air conditioner tail end, an outer zone air conditioner tail end, a first phase change cold accumulation, a second phase change cold accumulation, a phase change heat accumulation and at least one water chilling unit, wherein the inner zone air conditioner tail end, the cooling tower and the first phase change cold accumulation form a parallel loop; an evaporator of the water chilling unit and the tail end of the inner area air conditioner form a circulation loop, a condenser of the water chilling unit and the phase change heat storage form a circulation loop, and the evaporator of the water chilling unit and the second phase change heat storage form a circulation loop; the second phase change cold accumulation and the tail end of the air conditioner in the inner area form a circulation loop, and the second phase change cold accumulation and the tail end of the air conditioner in the outer area form a circulation loop; the phase change heat storage, the external heat source, the domestic hot water heat exchange device and the tail end of the outer-zone air conditioner form a parallel loop. The utility model combines phase change cold accumulation and heat accumulation with a cooling tower, utilizes outdoor free cold supply to the maximum extent, recovers condensation heat, and maximizes the energy-saving effect by considering the operating condition all the year round in summer.
Description
The technical field is as follows:
the utility model relates to a cold and heat source system based on a phase change cold accumulation and heat accumulation combined cooling tower.
Background art:
with the increase of large public buildings, the energy consumption of air conditioners is rapidly increased, and according to statistics, the energy consumption of the air conditioners of the large public buildings accounts for about 45 percent of the total energy consumption of the buildings, and becomes an important part of the non-negligible social energy consumption. At present, public buildings with larger volume, such as office buildings, markets, complexes, hospitals and the like, have the common characteristic that an inner building area which needs to be cooled in winter exists, a cold source is independently started for cooling, and an outer building area is started for heating by a heat source. The effective measure of energy saving is to transfer the residual heat of the inner area to the outer area and to realize free cooling by using the lower outdoor temperature in winter. However, the direct cooling of the cooling tower is limited by the outdoor temperature, and the expected energy-saving effect cannot be achieved due to the short opening time. In summer, the peak-valley difference of the urban power grid is aggravated by opening and closing the air conditioner of the large public building in the daytime and at night, and a large amount of condensation heat is not utilized.
Even if the existing cold and heat source system adopts a cooling tower for cooling, the expected energy-saving effect cannot be achieved. The direct cooling capacity of the cooling tower is reduced along with the increase of the outdoor wet bulb temperature, and when the outdoor wet bulb temperature is higher, the direct cooling capacity of the cooling tower cannot provide stable cooling capacity, so that the starting time is limited. The cooling tower supplies cold and has a contradiction with the demand on the time of the cooling load of the inner area, the cooling tower directly supplies cold at night when the outdoor wet bulb temperature is low, the indoor area is small or even no, the load of the inner area is large in the daytime but the cooling tower directly supplies cold at high outdoor temperature is small, the matching time of the load of the inner area is short, and therefore the free cold supply starting time is limited; meanwhile, the peak-valley difference of the power grid is aggravated by a traditional cold and heat source system in summer, and a large amount of condensation heat is not recycled.
The utility model has the following contents:
the utility model is to provide a cold and heat source system based on a cooling tower combining phase change cold accumulation and heat accumulation.
In order to achieve the purpose, the utility model adopts the technical scheme that: a cold and heat source system based on a phase change cold accumulation and heat accumulation combined cooling tower comprises a cooling tower, an inner zone air conditioner terminal device, an outer zone air conditioner terminal device, a first phase change cold accumulation device, a second phase change cold accumulation device, a phase change heat accumulation device, an external heat source and at least one water chilling unit, wherein the inner zone air conditioner terminal device, the cooling tower and the first phase change cold accumulation device form a first parallel loop through a pipeline; an evaporator of the water chilling unit and an inner area air conditioner tail end device form a first circulation loop through a pipeline, and a condenser of the water chilling unit and the phase change heat storage device form a second circulation loop through a pipeline; an evaporator of the water chilling unit and the second phase change cold storage device form a third circulation loop through a pipeline; the second phase change cold accumulation device and the end device of the air conditioner in the outer area form a fifth circulation loop through pipelines; the output ends of the phase change heat storage device and the external heat source, the domestic hot water heat exchange device and the outer zone air conditioner tail end device form a second parallel loop through pipelines.
Furthermore, the water chilling unit comprises a first water chilling unit and a second water chilling unit which are arranged in parallel, an evaporator of the first water chilling unit and an inner area air conditioner terminal device form a first circulation loop through a pipeline, and a first water pump is installed at the output end of the evaporator, close to the first water chilling unit, of the first circulation loop.
Further, a condenser of the first water chilling unit and a condenser of the second water chilling unit are both connected in series to the second circulation loop, and a second water pump is arranged on one side of the input end of the phase change heat storage device; and the evaporator of the first water chilling unit and the evaporator of the second water chilling unit are connected in series to the third circulation loop.
Further, still include cold water collector and cold water knockout drum, the evaporimeter output of first cooling water set, the evaporimeter output of second cooling water set, the output of interior district air conditioner end device, the output of outer district air conditioner end device are connected with the cold water collector through the pipeline respectively, the output of cold water collector is connected and is equipped with the third water pump on the pipeline through the pipeline with the input of second phase change cold storage device, the output of second phase change cold storage device is connected with the input of cold water knockout drum, the output of cold water knockout drum is connected with the evaporimeter input of first cooling water set, the evaporimeter input of second cooling water set, the input of interior district air conditioner end device, the input of outer district air conditioner end device through the pipeline respectively.
Furthermore, the water outlet end of the cooling tower is provided with a fourth water pump, a first regulating valve, a filter and a second regulating valve are sequentially arranged on a pipeline between the fourth water pump and the input end of the inner area air conditioner terminal device along the conveying direction, and a third regulating valve is arranged on a pipeline between the output end of the inner area air conditioner terminal device and the water return end of the cooling tower.
Furthermore, a fourth regulating valve is arranged on a pipeline between the fourth water pump and the input end of the first phase change cold storage device, a fifth regulating valve is arranged on a pipeline between the output end of the first phase change cold storage device and the first regulating valve, and a sixth regulating valve is arranged on a pipeline between the output end of the first phase change cold storage device and the water return end of the cooling tower.
Furthermore, the output end of the external heat source is connected with the output end of the phase change heat storage device through a pipeline, the input end of the external heat source is respectively connected with the input end of the phase change heat storage device and the output end of the outer air conditioner terminal device, and the output end of the external heat source is connected with the domestic hot water heat exchange device through a pipeline.
Furthermore, a hot water distributor is arranged on a pipeline between the output end of the external heat source and the domestic hot water heat exchange device, and is connected with the input end of the end device of the outer air conditioner through a pipeline; and a hot water collector and a fifth water pump are sequentially arranged on a pipeline between the input end of the external heat source and the output end of the outer zone air conditioner terminal device along the conveying direction, and the hot water collector is connected with the domestic hot water heat exchange device through a pipeline.
Compared with the prior art, the utility model has the following effects: the utility model has reasonable design, combines phase change cold accumulation and phase change heat accumulation with cooling tower for cooling, utilizes outdoor free cooling to the maximum extent, recovers condensation heat, and simultaneously considers the annual operation working condition in combination with summer to maximize the energy-saving effect.
Description of the drawings:
FIG. 1 is a schematic construction of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first parallel circuit according to an embodiment of the present invention;
FIG. 3 is a schematic view of the cooling tower of FIG. 2 in a state of direct cooling;
fig. 4 is a schematic view of a state in which only cold accumulation is completed in fig. 2;
FIG. 5 is a schematic diagram of the cooling tower of FIG. 2 being cooled simultaneously with the first phase change cold storage device;
FIG. 6 is a schematic view showing the configuration of a first circulation circuit in the embodiment of the present invention;
FIG. 7 is a schematic view showing the construction of the second and third circulation circuits in the embodiment of the present invention;
FIG. 8 is a schematic diagram showing the construction of fourth and fifth circulation circuits in the embodiment of the present invention;
FIG. 9 is a schematic diagram showing the configuration of a second parallel circuit in the embodiment of the present invention;
FIG. 10 is a schematic view showing a state of heat supply of the phase change heat storage device in the winter season of FIG. 9;
fig. 11 is a schematic diagram illustrating a heating state of the summer daytime phase change heat storage device in fig. 9.
In the figure:
1-a first water chiller; 101-an evaporator of a first chiller; 102-a condenser of a first chiller; 2-a second water chilling unit; 201-an evaporator of a second chiller; 202-a condenser of a second chiller; 3-a first phase change cold storage device; 4-a second phase change cold storage device; 5-cold water collector; 6-cold water separator; 7-a fourth water pump; 8-a first water pump; 9-a third water pump; 10-inner zone air conditioning end unit; 11-outer zone end air conditioning unit; 12-a phase change thermal storage device; 13-an external heat source; 14-hot water separator; 15-hot water collector; 16-domestic hot water heat exchange device; 17-a fifth water pump; 18-a second water pump; 19-a cooling tower; 20-a first regulating valve; 21-a filter; 22-a second regulating valve; 23-a third regulating valve; 24-a fourth regulating valve; 25-a fifth regulating valve; 26-a sixth regulating valve; 27-a seventh regulating valve; 28-eighth regulating valve; 29-ninth regulating valve; 30-a tenth regulator valve; 31-eleventh regulating valve; 32-twelfth regulating valve; 33-a thirteenth regulating valve; 34-a fourteenth regulating valve; 35-a fifteenth regulator valve; 36-sixteenth regulating valve; 37-seventeenth regulating valve; 38-eighteenth regulating valve; 39-nineteenth regulating valve; 40-twentieth regulating valve; 41-twenty-first regulating valve; 42-twenty-second regulating valve; 43-twenty-third regulating valve; 44-twenty-fourth regulator valve; 45-twenty-fifth regulating valve; 46-first parallel loop; 47-first circulation loop; 48-a second circulation loop; 49-a third circulation loop; 50-a fourth circulation loop; 51-a fifth circulation loop; 52-second parallel loop.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1, the cooling-heating source system based on the phase-change cold storage and heat storage combination cooling tower of the present invention comprises a cooling tower 19, an inner zone air-conditioning terminal device 10, an outer zone air-conditioning terminal device 11, a first phase-change cold storage device 3, a second phase-change cold storage device 4, a phase-change heat storage device 12, an external heat source 13, a domestic hot water heat exchange device 16 and a chiller, wherein the inner zone air-conditioning terminal device 10, the cooling tower 19 and the first phase-change cold storage device 3 form a parallel loop 46 through a pipeline, as shown in fig. 2, in the parallel loop, the cooling tower 19 can directly supply cold for the inner zone air-conditioning terminal device 10, and the redundant cold energy can be stored through the first phase-change cold storage device 3, and then the cold energy stored by the cooling tower 19 and the first phase-change cold storage device 3 can be simultaneously supplied for the inner zone air-conditioning terminal device 10; the evaporator of the water chilling unit and the inner zone air conditioner terminal device 10 form a first circulation loop 47 through a pipeline, as shown in fig. 6, the inner zone air conditioner terminal device can be cooled by the water chilling unit in the first circulation loop; the condenser of the chiller and the phase change heat storage device 12 form a second circulation loop 48 through a pipeline, as shown in fig. 7, in the second circulation loop, the condensation heat of the chiller is stored by the phase change heat storage device; the evaporator of the chiller and the second phase change cold storage device 4 form a third circulation loop 49 through a pipeline, as shown in fig. 7, in the third circulation loop, the second phase change cold storage device stores the cold energy of the chiller at night in summer; the second phase change cold accumulation device 4 and the inner zone air-conditioning end device 10 form a fourth circulation loop 50 through a pipeline, the second phase change cold accumulation device 4 and the outer zone air-conditioning end device 11 form a fifth circulation loop 51 through a pipeline, and as shown in fig. 8, the second phase change cold accumulation device supplies cold for the inner zone air-conditioning end device and the outer zone air-conditioning end device in summer and daytime; the output ends of the phase change heat storage device 12 and the external heat source 13, the domestic hot water heat exchange device 16 and the outer zone air conditioner tail end device 11 form a second parallel loop 52 through pipelines, as shown in fig. 9; in the second parallel loop, the phase change heat storage device 12 and the external heat source 13 can jointly supply heat to the hot water heat exchange device 16 and the outer zone end air conditioning device 11 in winter, as shown in fig. 10; in summer and daytime, the phase change heat storage device 12 and the external heat source 13 are combined to supply heat to the hot water heat exchange device 16, as shown in fig. 11.
In this embodiment, the water chilling unit includes a first water chilling unit 1 and a second water chilling unit 2 which are arranged in parallel, an evaporator 101 of the first water chilling unit and an inner area air conditioning terminal device 10 form a first circulation loop 47 through a pipeline, and a first water pump 8 is installed at an output end of the evaporator 101 close to the first water chilling unit in the first circulation loop.
In this embodiment, the condenser 102 of the first chiller and the condenser 202 of the second chiller are both connected in series to the second circulation loop 48; the evaporator 101 of the first chiller and the evaporator 201 of the second chiller are both connected in series to the third circulation circuit 49, as shown in fig. 7.
In this embodiment, the condenser 102 of the first water chilling unit and the condenser 202 of the second water chilling unit are both connected in series with the phase change heat storage device 12, that is, the condensation heat output by the condenser of the first water chilling unit and the condenser of the second water chilling unit is simultaneously transmitted to the phase change heat storage device and stored by the phase change heat storage device.
In this embodiment, a second water pump 18 is provided on the input side of the phase change thermal storage device 12.
In this embodiment, the system further includes a cold water collector 5 and a cold water distributor 6, the output end of the evaporator 101 of the first water chiller, the output end of the evaporator 201 of the second water chiller, the output end of the inner zone air conditioner terminal device 10, and the output end of the outer zone air conditioner terminal device 11 are respectively connected with the cold water collector 5 through pipelines, the output end of the cold water collector 5 is connected with the input end of the second phase change cold storage device 4 through pipelines, the output end of the second phase change cold storage device 4 is connected with the input end of the cold water distributor 6, and the output end of the cold water distributor 6 is respectively connected with the input end of the evaporator 101 of the first water chiller, the input end of the evaporator 201 of the second water chiller, the input end of the inner zone air conditioner terminal device 10, and the input end of the outer zone air conditioner terminal device 11 through pipelines.
In this embodiment, a third water pump 9 is disposed on a pipeline between the cold water collector 5 and the second phase change cold storage device 4.
In this embodiment, the water outlet end of the cooling tower 19 is provided with a fourth water pump 7, a first regulating valve 20, a filter 21 and a second regulating valve 22 are sequentially arranged on a pipeline between the fourth water pump 7 and the input end of the inner air-conditioning end device 10 along the conveying direction, and a third regulating valve 23 is arranged on a pipeline between the output end of the inner air-conditioning end device 10 and the water return end of the cooling tower 19.
In this embodiment, a fourth regulating valve 24 is disposed on a pipeline between the fourth water pump 7 and the input end of the first phase change cold storage device 3, a fifth regulating valve 25 is disposed on a pipeline between the output end of the first phase change cold storage device 3 and the first regulating valve 20, and a sixth regulating valve 26 is disposed on a pipeline between the output end of the first phase change cold storage device 3 and the water return end of the cooling tower 19.
In this embodiment, the system further includes an external heat source 13 for supplying heat to the domestic hot water heat exchange device 16, an output end of the external heat source 13 is connected with the domestic hot water heat exchange device 16 through a pipeline, an output end of the external heat source 13 is connected with an output end of the phase change heat storage device 12 through a pipeline, and heat stored in the phase change heat storage device 12 is used as supplement of the external heat source 13 and is used for heating domestic hot water and supplying heat to an air conditioner terminal device in an outer area in winter; the input end of the external heat source 13 is connected with the input end of the phase change heat storage device 12 and the output end of the winter outer zone air conditioning end device 11 respectively, so as to provide heat for the winter outer zone air conditioning end device. Preferably, the domestic hot water heat exchange device can be an existing plate heat exchanger.
In this embodiment, a hot water separator 14 is disposed in a pipeline between the output end of the external heat source 13 and the domestic hot water heat exchange device 16, the hot water separator 14 is connected to the input end of the device at the end 11 of the outer air conditioner through a pipeline, and a seventh regulating valve 27 is disposed on the pipeline.
In this embodiment, an eighth regulating valve 28, a hot water collector 15 and a fifth water pump 17 are sequentially arranged on a pipeline between the input end of the external heat source 13 and the output end of the outer air-conditioning terminal device 11 along the conveying direction, and the hot water collector 15 is connected with the domestic hot water heat exchange device 16 through a pipeline.
In this embodiment, a ninth regulating valve 29 is provided on a pipe between the input end of the external heat source 13 and the input end of the phase change heat storage device 12; a tenth regulating valve 30 is arranged on a pipeline between the output end of the external heat source 13 and the output end of the phase change heat storage device 12; the input end and the output end of the external heat source 13 are respectively provided with an eleventh regulating valve 31 and a twelfth regulating valve 32.
In this embodiment, a thirteenth regulating valve 33 is disposed on one side of an input end of the evaporator 101 of the first water chilling unit, and a fourteenth regulating valve 34 and a fifteenth regulating valve 35 are disposed on an input end and an output end of the condenser 102 of the first water chilling unit, respectively. And a sixteenth regulating valve 36 and a seventeenth regulating valve 37 are respectively arranged at the input end and the output end of the condenser 202 of the second water chilling unit.
In this embodiment, the input end of the cold water collector 5 is connected with four pipelines, the four pipelines are respectively connected with the output end of the evaporator 101 of the first water chilling unit, the output end of the evaporator 201 of the second water chilling unit, the output end of the inner zone air conditioning end device 10 and the output end of the outer zone air conditioning end device 11, and the eighteenth regulating valve 38, the nineteenth regulating valve 39, the twentieth regulating valve 40 and the twenty-first regulating valve 41 are respectively arranged on the four pipelines. The output end of the cold water separator 6 is connected with four pipelines, the four pipelines are respectively connected with the input end of the inner zone air conditioner terminal device 10, the input end of the evaporator 101 of the first water cooling unit, the input end of the outer zone air conditioner terminal device 11 and the input end of the evaporator 201 of the second water cooling unit, and the four pipelines are respectively provided with a twenty-second regulating valve 42, a twenty-third regulating valve 43, a twenty-fourth regulating valve 44 and a twenty-fifth regulating valve 45.
It should be noted that the cooling tower, the inner zone air conditioner terminal device, the outer zone air conditioner terminal device, the first phase change cold accumulation device, the second phase change cold accumulation device, the phase change heat accumulation device and the water chilling unit are all the prior art, and the structure and the connection relationship thereof are not repeated herein.
In the embodiment, on the basis of a traditional cold and heat source system, the phase change cold accumulation and heat storage device is introduced, the cooling tower is combined for cooling, and the cold energy directly supplied to the cooling tower at night is stored through the first phase change cold accumulation device in winter, so that insufficient cold energy in the daytime is made up; when the inner area adopts the cooling water set to supply cold, the phase change heat storage device stores condensation heat, recovers the waste heat of the inner area, and uses the waste heat of the outer area and the domestic hot water. Open the cooling water set night summer, store cold volume and retrieve the heat of condensation, utilize the cold-storage device cooling daytime, heat accumulation device can regard as life hot water heat source, specific during operation:
(1) in winter and transition season, the cooling tower is utilized to the maximum extent for cooling:
1) when the outdoor wet bulb temperature is lower than 9-10 ℃, the air conditioner in the inner area is started, and the cooling tower is directly started for cooling: opening the cooling tower 19, the fourth water pump 7 and the inner zone air-conditioning end device 10, opening the first regulating valve 20, the second regulating valve 22 and the third regulating valve 23, wherein the cooling tower 19, the fourth water pump 7, the first regulating valve 20, the filter 21, the second regulating valve 22 and the inner zone air-conditioning end device 10 form a circulation loop, and as shown in fig. 3, the cooling tower 19 directly supplies cold to the inner zone air-conditioning end device 10; if the redundant cold energy exists, the fourth regulating valve 24 and the sixth regulating valve 26 are opened, and the cold energy provided by the cooling tower 19 is stored through the first phase change cold storage device 3; when the inner zone air conditioner is not started (such as at night), only the cooling tower 19 and the fourth water pump 7, and the fourth regulating valve 24 and the sixth regulating valve 26 are started, and at this time, the cooling tower 19, the fourth water pump 7, the fourth regulating valve 24, the first phase change cold accumulation device 3 and the sixth regulating valve 26 form a circulation loop, as shown in fig. 4, at this time, the first phase change cold accumulation device 3 accumulates the cold energy of the cooling tower 19, and only the cold accumulation process is completed;
2) when the outdoor wet bulb temperature is between 10 and 19 ℃, the cooling tower can still be used for cooling: the cooling tower 19, the fourth water pump 7, the inner zone air-conditioning end device 10, the fourth regulating valve 24, the fifth regulating valve 25, the second regulating valve 22 and the third regulating valve 23 are opened, at this time, the cooling tower 19, the fourth water pump 7, the fourth regulating valve 24, the first phase change cold storage device 3, the fifth regulating valve 25, the filter 21, the second regulating valve 22, the inner zone air-conditioning end device 10 and the third regulating valve 23 form a circulation loop, as shown in fig. 5, at this time, the cooling water of the cooling tower 19 flows through the fourth regulating valve 24, passes through the first phase change cold storage device 3, then flows through the fifth regulating valve 25, then sequentially passes through the filter 21 and the second regulating valve 22, and enters the inner zone air conditioning end device 10, finally flows through the cooling tower 19 and the first phase change cold storage device 3 from the inner zone air conditioning end device 10, in the process, the cooling energy stored by the cooling tower 19 and the first phase change cold storage device 3 supplies cold for the inner zone air conditioner tail end device 10;
3) when the outdoor wet bulb temperature is higher than 19 ℃, stopping cooling of the cooling tower, starting the first water chilling unit 1, the first water pump 8 and the second water pump 18, starting the thirteenth regulating valve 33, the fourteenth regulating valve 34, the fifteenth regulating valve 35 and the second regulating valve 22, at this time, the evaporator 101, the first water pump 8, the second regulating valve 22, the inner zone air conditioning end device 10 and the thirteenth regulating valve 33 of the first water chilling unit form a circulation loop, the condenser 102, the fifteenth regulating valve 35, the second water pump 18, the phase change heat storage device 12 and the fourteenth regulating valve 34 of the first water chilling unit form a circulation loop, as shown in fig. 6, at this time, the evaporator 101 of the first water chilling unit supplies cold to the inner zone air conditioning end device 10, the condensation heat generated by the condenser 102 of the first water chilling unit is stored by the phase change heat storage device 12, and the heat stored by the phase change heat storage device 12 is used as supplement of the external heat source 13, the domestic hot water heat exchange device 16 is used for exchanging heat and supplying hot water for the outer zone air conditioner tail end device 11, as shown in fig. 10;
(2) in summer, the inner zone and the outer zone are both cold loads;
1) when the air conditioning system is closed at night: the first water chilling unit 1, the second water chilling unit 2, the third water pump 9 and the second water pump 18 are started, the fourteenth regulating valve 34, the fifteenth regulating valve 35, the sixteenth regulating valve 36, the seventeenth regulating valve 37, the twenty-third regulating valve 43, the twenty-fifth regulating valve 45, the eighteenth regulating valve 38 and the nineteenth regulating valve 39 are started, at this time, the evaporator 101, the eighteenth regulating valve 38, the cold water collector 5, the third water pump 9, the second phase change cold storage device 4, the cold water separator 6 and the twenty-third regulating valve 43 of the first water chilling unit form a circulation loop, the condenser 102, the fifteenth regulating valve 35, the second water pump 18, the phase change heat storage device 12 and the fourteenth regulating valve 34 of the first water chilling unit form a circulation loop, the evaporator 201, the nineteenth regulating valve 39, the cold water collector 5, the third water pump 9 and the second phase change cold storage device 4 of the second water chilling unit form a circulation loop, The cold water separator 6 and the twenty-fifth regulating valve 45 form a circulation loop, the condenser 202, the seventeenth regulating valve 37, the second water pump 18, the phase change heat storage device 12 and the sixteenth regulating valve 36 of the second water chiller form a circulation loop, as shown in fig. 7, in the process, the chilled water output by the evaporators of the first water chiller 1 and the second water chiller 2 stores cold energy through the second phase change cold storage device 4, and the condensation heat output by the condensation heat of the first water chiller 1 and the second water chiller 2 is stored through the phase change heat storage device 12, so that the purpose of underestimating the stored cold energy by utilizing the night power is realized;
2) when the air conditioning system is turned on in the daytime: the third water pump 9 is started, the second regulating valve 22, the twenty-second regulating valve 42, the twenty-fourth regulating valve 44, the twentieth regulating valve 40 and the twenty-first regulating valve 41 are started, the second phase change cold accumulation device 4, the twenty-second regulating valve 42, the second regulating valve 22, the inner zone air conditioner terminal device 10 and the twentieth regulating valve 40 form a circulation loop, the second phase change cold accumulation device 4, the twenty-fourth regulating valve 44, the outer zone air conditioner terminal device 11 and the twenty-first regulating valve 41 form a circulation loop, as shown in fig. 8, in the process, the second phase change cold accumulation device 4 is cooled to provide cold water for the inner zone air conditioner terminal device 10 and the outer zone air conditioner terminal device 11, and return water of the inner zone air conditioner terminal device 10 and the outer zone air conditioner terminal device 11 enters the second phase change device 4 through the cold water collector 5 and the third water pump 9. And the phase change heat storage device 12, the hot water distributor 14, the external heat source 13, the domestic hot water heat exchange device 16, the output end of the outer zone air conditioner terminal device 11, the hot water collector 15 and the fifth water pump 17 form a parallel loop, as shown in fig. 9, in the process, the phase change heat storage device 12 and the external heat source 13 can jointly supply heat to the domestic hot water heat exchange device 16 and the outer zone air conditioner terminal device 11 in winter, as shown in fig. 10, in summer and daytime, the phase change heat storage device 12 and the external heat source 13 jointly supply heat to the domestic hot water heat exchange device 16, as shown in fig. 11.
The utility model has the advantages that:
1) based on the combination of phase change cold storage and phase change heat storage and cooling tower cold supply, the traditional cold and heat source system is improved, the annual operation condition is considered, and the energy-saving effect is maximized;
2) the phase change cold accumulation device overcomes the contradiction between the outdoor free cold supply quantity and the inner district cold load, improves the critical value of the outdoor cold supply temperature of the cooling tower, and prolongs the free cold supply time. At night when the outdoor wet bulb temperature is lower, the cooling tower has large cooling capacity, and the inner area has small cooling load or the air conditioner is not started; and in the daytime when the outdoor wet bulb temperature is higher, the cooling capacity of the cooling tower is small, and the cooling load of the inner area is large. The phase change cold accumulation device is used for storing redundant cold energy at night, the stored cold energy is released in the daytime, the water outlet temperature of the cooling tower is further reduced, the opening time of the cooling tower is prolonged, and free cold supply is utilized to the maximum extent;
3) the phase change cold accumulation device stabilizes the water supply temperature of the air conditioner tail end device in the inner area. The cooling tower directly supplies cold, the water supply temperature changes along with the change of the outdoor temperature, the phase change cold storage provides a refrigerant in a phase change temperature range for the tail end device of the internal area air conditioner to use, and the water supply temperature of the tail end device is stabilized;
4) the phase change heat storage device recovers condensation heat. Winter, open as the cooling water set and supply cold for the inner zone, the phase change heat storage device retrieves the condensation heat of cooling water set, is equivalent to the waste heat of retrieving the inner zone, for outer zone and life hot water heat supply. In summer, the phase change heat storage device simultaneously recovers the waste heat of the water chilling units in the inner area and the outer area to supply heat for the domestic hot water, and the starting time of a boiler or other heat source equipment is shortened;
5) the summer phase change cold accumulation device changes the starting time of the traditional water chilling unit and is beneficial to the peak-valley balance of a power grid. The cold water unit is started at night in the low valley of the electric power, the phase change cold accumulation device accumulates cold, the cold water unit is closed in the peak period of the electric power consumption in the daytime, and the phase change cold accumulation device provides cold load for the inner region and the outer region and plays a positive role in peak clipping and valley filling of the electric power.
If the utility model discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.
Any part provided by the utility model can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.
Claims (8)
1. A cold and heat source system based on phase change cold accumulation and heat accumulation combined cooling tower is characterized in that: the system comprises a cooling tower, an inner zone air conditioner tail end device, an outer zone air conditioner tail end device, a first phase change cold accumulation device, a second phase change cold accumulation device, a phase change heat accumulation device, an external heat source and at least one water chilling unit, wherein the inner zone air conditioner tail end device, the cooling tower and the first phase change cold accumulation device form a first parallel loop through pipelines; the evaporator of the water chilling unit and the inner area air conditioner tail end device form a first circulation loop through a pipeline, the condenser of the water chilling unit and the phase change heat storage device form a second circulation loop through a pipeline, and the evaporator of the water chilling unit and the second phase change heat storage device form a third circulation loop through a pipeline; the second phase change cold accumulation device and the end device of the air conditioner in the outer area form a fifth circulation loop through pipelines; the output ends of the phase change heat storage device and the external heat source, the domestic hot water heat exchange device and the outer zone air conditioner tail end device form a second parallel loop through pipelines.
2. The cold and heat source system based on the phase change cold accumulation and heat accumulation combined cooling tower as claimed in claim 1, wherein: the water chilling unit comprises a first water chilling unit and a second water chilling unit which are arranged in parallel, an evaporator of the first water chilling unit and an inner area air conditioner terminal device form a first circulation loop through a pipeline, and a first water pump is installed at the output end of the evaporator, close to the first water chilling unit, of the first circulation loop.
3. The cold and heat source system based on the phase change cold accumulation and heat accumulation combined cooling tower as claimed in claim 2, wherein: the condenser of the first water chilling unit and the condenser of the second water chilling unit are connected in series to the second circulation loop, and a second water pump is arranged on one side of the input end of the phase change heat storage device; and the evaporator of the first water chilling unit and the evaporator of the second water chilling unit are connected in series to the third circulation loop.
4. The cold and heat source system based on the phase change cold accumulation and heat accumulation combined cooling tower as claimed in claim 3, wherein: still include cold water collector and cold water knockout drum, the evaporimeter output of first cooling water set, the evaporimeter output of second cooling water set, the output of interior district air conditioner end device, the output of outer district air conditioner end device are connected with the cold water collector through the pipeline respectively, the output of cold water collector is connected and is equipped with the third water pump on the pipeline through the pipeline with the input of second phase change cold storage device, the output of second phase change cold storage device is connected with the input of cold water knockout drum, the output of cold water knockout drum is connected with the evaporimeter input of first cooling water set, the evaporimeter input of second cooling water set, the input of interior district air conditioner end device, the input of air conditioner end device through the pipeline respectively.
5. The cold and heat source system based on the combination of phase change cold storage and heat storage cooling tower as claimed in claim 1, wherein: the water outlet end of the cooling tower is provided with a fourth water pump, a pipeline between the fourth water pump and the input end of the inner area air conditioner end device is sequentially provided with a first regulating valve, a filter and a second regulating valve along the conveying direction, and a third regulating valve is arranged on a pipeline between the output end of the inner area air conditioner end device and the water return end of the cooling tower.
6. The cold and heat source system based on the phase change cold accumulation and heat accumulation combined cooling tower as claimed in claim 5, wherein: a fourth regulating valve is arranged on a pipeline between the fourth water pump and the input end of the first phase change cold accumulation device, a fifth regulating valve is arranged on a pipeline between the output end of the first phase change cold accumulation device and the first regulating valve, and a sixth regulating valve is arranged on a pipeline between the output end of the first phase change cold accumulation device and the water return end of the cooling tower.
7. The cold and heat source system based on the phase change cold accumulation and heat accumulation combined cooling tower as claimed in claim 1, wherein: the output end of the external heat source is connected with the output end of the phase change heat storage device through a pipeline, the input end of the external heat source is respectively connected with the input end of the phase change heat storage device and the output end of the outer zone air conditioner terminal device, and the output end of the external heat source is connected with the domestic hot water heat exchange device through a pipeline.
8. The cold and heat source system based on the combination of phase change cold storage and heat storage cooling tower as claimed in claim 7, wherein: a hot water distributor is arranged on a pipeline between the output end of the external heat source and the domestic hot water heat exchange device, and is connected with the input end of the end device of the outer air conditioner through the pipeline; and a hot water collector and a fifth water pump are sequentially arranged on a pipeline between the input end of the external heat source and the output end of the outer zone air conditioner terminal device along the conveying direction, and the hot water collector is connected with the domestic hot water heat exchange device through a pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220230777.7U CN216924838U (en) | 2022-01-28 | 2022-01-28 | Cold and heat source system based on phase change cold accumulation and heat accumulation combined cooling tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220230777.7U CN216924838U (en) | 2022-01-28 | 2022-01-28 | Cold and heat source system based on phase change cold accumulation and heat accumulation combined cooling tower |
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| CN202220230777.7U Expired - Fee Related CN216924838U (en) | 2022-01-28 | 2022-01-28 | Cold and heat source system based on phase change cold accumulation and heat accumulation combined cooling tower |
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| CN (1) | CN216924838U (en) |
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