CN111520794A

CN111520794A - Heat recovery heating system

Info

Publication number: CN111520794A
Application number: CN201910106352.8A
Authority: CN
Inventors: 张敬; 王强
Original assignee: Beijing Jingdong Century Trading Co Ltd; Beijing Jingdong Shangke Information Technology Co Ltd
Current assignee: Beijing Jingdong Century Trading Co Ltd; Beijing Jingdong Shangke Information Technology Co Ltd
Priority date: 2019-02-01
Filing date: 2019-02-01
Publication date: 2020-08-11

Abstract

The present disclosure provides a heat recovery heating system for retrieving indoor heat and using the retrieved heat for heating, including a heat source subsystem and a heating subsystem, wherein: the heat source subsystem includes: the cooling unit comprises a heat recovery device, wherein the heat recovery device is used for cooling the indoor air by using cooling fluid and acquiring heat in the air; and the heat pump unit is used for outputting heat supply fluid with a preset temperature by utilizing the heat acquired by the cooling fluid.

Description

Heat recovery heating system

Technical Field

The present disclosure relates to the field of electronic technology, and more particularly, to a heat recovery heating system.

Background

With the development of science and technology, the demand on the network is more and more, the storage, calculation, transmission and the like of network information data need to be supported by a data center, a large number of servers and supporting facilities are placed in the data center, and in order to avoid equipment downtime caused by overhigh internal temperature of the data center, the data center needs to be matched with a heat dissipation system.

In the course of implementing the disclosed concept, the inventors found that there are at least the following problems in the prior art:

in the operation process of the data center, a large amount of heat generated by IT equipment is dissipated to the outdoor environment through a cooling system, and in a high-altitude area with low temperature throughout the year, auxiliary buildings such as offices, operation and maintenance, dormitories and the like and peripheral civil buildings matched with the data center need a large amount of heat in winter to meet the heat supply requirement; at present, a boiler is usually used for burning a large amount of non-renewable energy resources such as coal, natural gas and the like for heating in a building, and a large amount of emissions such as dust, acid gas and the like generated by burning cause serious pollution to the environment.

Disclosure of Invention

In view of the above, the present disclosure provides a heat recovery heating system for recovering indoor heat and using the recovered heat for heating, including a heat source subsystem and a heating subsystem, wherein: the heat source subsystem includes: the cooling unit comprises a heat recovery device, wherein the heat recovery device is used for cooling the indoor air by using cooling fluid and acquiring heat in the air; the heat pump unit is used for outputting heat supply fluid with a preset temperature by utilizing the heat acquired by the cooling fluid; the heating subsystem is used for heating at least by using the heating fluid with the preset temperature.

According to the embodiment of the present disclosure, the cooling unit further includes a circulation fan and a cooling device; the heat recovery device, the circulating fan and the cooling device are sequentially arranged from the indoor air return side to the air supply side of the cooling unit; under a first condition, the heat recovery device and the circulating fan are started, and the heat recovery device is used for cooling and recovering heat of indoor air; under a second condition, the circulating fan and the cooling device are started, and the cooling device is used for cooling indoor air; wherein the first condition includes being in a predetermined heating time period or the outdoor ambient temperature being below a predetermined temperature, and the second condition includes being in a predetermined non-heating time period or the outdoor ambient temperature being not below a predetermined temperature.

According to an embodiment of the present disclosure, the heat supply subsystem comprises a heat supply station and a heat exchange station; the heat supply station is at least used for collecting heat supply fluid conveyed by the heat pump units and distributing the heat supply fluid to the heat exchange station; the heat exchange station is used for obtaining terminal circulating fluid with a preset temperature by utilizing the heat supply fluid conveyed by the heat supply station, and conveying the terminal circulating fluid to corresponding terminal heat users for heat supply.

According to the embodiment of the disclosure, the heat supply station comprises heat supply station heat source equipment which is started under the condition that the heat source subsystem cannot supply heat or the heat supply capacity is insufficient and used as a standby heat source to supply heat to the heat exchange station.

According to the embodiment of the disclosure, the heat supply station further comprises a heat storage device, and the heat storage device is used for storing heat by utilizing the heat pump unit or the heat source device of the heat supply station in the valley power supply time period of the power grid and providing heat for the heat exchange station in the peak power supply time period of the power grid.

According to an embodiment of the present disclosure, the heat recovery heating system has at least a heat pump unit heating mode, a heating plant heat source device heating mode, a heat storage device heating mode, and a heat storage device heat storage mode, wherein: in the heat supply mode of the heat pump unit, the heat pump unit is independently utilized to supply heat to the heat exchange station; under the heat supply mode of the heat supply station heat source equipment, the heat supply station heat source equipment is independently utilized to provide heat for the heat exchange station; in the heat storage equipment heat supply mode, the heat storage equipment is independently utilized to supply heat to the heat exchange station; and in the heat storage mode of the heat storage equipment, the heat pump unit or the heat source equipment of the heat supply station supplies part of heat to the heat exchange station, and the other part of heat is supplied to the heat storage equipment, so that the heat storage equipment stores heat.

According to the embodiment of this disclosure, heat recovery heating system still include the pipe network, the pipe network includes: a heat pump unit heat source side water supply and return pipeline, a heat pump unit heat supply side water supply and return pipeline, a second heat source equipment water supply and return pipeline, a heat storage equipment heat supply side water supply and return pipeline, a water supply and return main pipeline, a heat exchange station primary side water supply and return pipeline and a heat exchange station secondary side water supply and return pipeline; the water supply and return pipeline on the heat source side of the heat pump unit is connected with the cooling unit and the heat pump unit; the heat pump unit heat supply side water supply and return pipeline is connected with the heat pump unit and the water supply and return main pipeline, and is connected with the heat pump unit and the heat storage equipment; the water supply and return pipeline of the heat supply station heat source equipment is connected with the heat supply station heat source equipment and the water supply and return main pipeline, and is connected with the heat supply station heat source equipment and the heat storage equipment; the heat storage equipment heat supply side water supply and return pipeline is connected with the heat storage equipment and the water supply and return main pipeline; the water supply and return main pipeline is connected with a primary side water supply and return pipeline of the heat exchange station; and the secondary side water supply and return pipeline of the heat exchange station is connected with the heat exchange station and a terminal user.

According to an embodiment of the present disclosure, the cooling unit comprises an indirect evaporative cooling unit.

According to an embodiment of the present disclosure, the cooling device includes an air-to-air heat exchanger; the air-air heat exchanger is used for cooling indoor air by utilizing outdoor air; the cooling unit further comprises a supplementary cooling device, the supplementary cooling device comprises a cooling coil, and the cooling coil is used for being opened when the heat exchange capacity of the air-air heat exchanger is insufficient to supplement and refrigerate the indoor air.

According to the embodiment of the disclosure, one or more cooling units are arranged aiming at each heat pump unit; and aiming at each heat supply station, one or more heat pump units and one or more heat exchange stations are arranged.

According to the embodiment of the present disclosure, it is possible to at least partially solve the problems that the heat of the data center cannot be effectively utilized and the environmental pollution is caused by the heating combustion products, and thus it is possible to realize the use of the waste heat recovery in the indoor space of the building, etc., such as the data center, etc., in which the equipment generating heat during the work is disposed, for heating, not only to improve the energy utilization efficiency, but also to effectively reduce the technical effect of the environmental pollution caused by the heating in winter.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure with reference to the accompanying drawings, in which:

fig. 1 schematically illustrates an exemplary application scenario in which a heat recovery heating system may be applied according to an embodiment of the present disclosure;

fig. 2 schematically shows a structural composition diagram of a heat recovery heating system according to an embodiment of the present disclosure;

FIG. 3 schematically shows an application scenario diagram of a heat source subsystem according to an embodiment of the present disclosure

FIG. 4 is a schematic diagram illustrating the structural components of a cooling unit according to an embodiment of the present disclosure;

fig. 5 schematically shows a structural composition diagram of a heat recovery heating system according to another embodiment of the present disclosure;

fig. 6 schematically shows a structural composition diagram of a heating plant according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram illustrating a flow path of supply and return water in an independent heating mode of a heat pump unit according to an embodiment of the disclosure;

FIG. 8 is a schematic diagram illustrating a supply and return water flow path in a second heat source equipment independent heating mode according to an embodiment of the disclosure;

FIG. 9 schematically illustrates a supply and return water flow path in an independent heating mode of a thermal storage device according to an embodiment of the disclosure;

FIG. 10 schematically illustrates a supply and return water flow path in a thermal storage device thermal storage mode according to an embodiment of the disclosure;

FIG. 11 schematically illustrates a supply and return water flow path in a thermal storage device thermal storage mode according to another embodiment of the disclosure.

Detailed Description

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is illustrative only and is not intended to limit the scope of the present disclosure. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The terms "comprises," "comprising," and the like, as used herein, specify the presence of stated features, operations, and/or components, but do not preclude the presence or addition of one or more other features, operations, or components.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art unless otherwise defined. It is noted that the terms used herein should be interpreted as having a meaning that is consistent with the context of this specification and should not be interpreted in an idealized or overly formal sense.

Where a convention analogous to "at least one of A, B and C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a device having at least one of A, B and C" would include but not be limited to devices having a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.). Where a convention analogous to "A, B or at least one of C, etc." is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., "a device having at least one of A, B or C" would include but not be limited to devices having a alone, B alone, C alone, a and B together, a and C together, B and C together, and/or A, B, C together, etc.).

An embodiment of the present disclosure provides a heat recovery heating system, for recovering indoor heat and using the recovered heat for heating, including a heat source subsystem and a heating subsystem, wherein: the heat source subsystem includes: the cooling unit comprises a heat recovery device, wherein the heat recovery device is used for cooling the indoor air by using cooling fluid and acquiring heat in the air; the heat pump unit is used for outputting heat supply fluid with a preset temperature by utilizing the heat acquired by the cooling fluid; the heating subsystem is capable of providing heat using at least the heating fluid at the predetermined temperature.

According to the heat recovery and supply system disclosed by the embodiment of the disclosure, indoor air is circularly cooled through the cooling unit, and the heat recovery device is additionally arranged in the cooling unit. In this way, not only can the air be cooled, but also the waste heat in the data center room can be recovered, the absorbed low-grade energy (low-grade energy) is converted into high-grade energy (high-grade energy) by using a heat pump, and then the high-grade energy is used for heating, wherein the grade of the energy refers to the percentage of the energy containing useful components, and the higher the percentage of the useful components is, the higher the grade is, in the embodiment of the disclosure, the waste heat in the indoor air is lower in temperature, less in energy and not easy to be directly used, and is called as low-grade energy; the heat supply fluid obtained by the heat pump has higher temperature and higher energy, is easy to be utilized and is called high-grade energy. The heat recovery heating system of the embodiment of the disclosure realizes a high-efficiency data center waste heat recovery heating technology, improves the energy utilization efficiency, and reduces the pollution of the traditional heating mode to the environment.

Fig. 1 schematically shows an exemplary application scenario in which a heat recovery heating system may be applied according to an embodiment of the present disclosure. It should be noted that fig. 1 is only an example of an application scenario in which the embodiments of the present disclosure may be applied to help those skilled in the art understand the technical content of the present disclosure, but does not mean that the embodiments of the present disclosure may not be applied to other devices, systems, environments or scenarios.

As shown in fig. 1, the heat recovery heating system according to the embodiment of the present disclosure may be used to recover waste heat in a building such as a data center 110 and use the recovered heat for heating of a surrounding building 120, a building 130, and the like. Further, the heat recovery heating system of the embodiment of the present disclosure may be applied to any indoor space such as a building or a room provided with equipment that continuously generates heat during operation, for example, a data center, a machine room, or a high-temperature production plant.

In the operation process of the data center, a large amount of heat generated by IT equipment is dissipated to the outdoor environment through a cooling system, and in high-altitude areas with low temperature throughout the year, auxiliary buildings such as offices, operation and maintenance and dormitories and peripheral civil buildings matched with the data center need a large amount of heat to meet the requirement of heat supply in winter. At present, a large amount of non-renewable energy sources such as coal, natural gas and the like are generally consumed for heating by using boiler combustion, and a large amount of emissions such as dust, acid gas and the like generated by combustion cause serious pollution to the environment. The heat recovery and supply system provided by the embodiment of the present disclosure recovers waste heat in the data center 110, and supplies heat to surrounding rooms or buildings by using the recovered waste heat, where the surrounding rooms or buildings include other rooms in the building where the data center is located, and also include other buildings surrounding the building where the data center is located, and may be connected to a heat supply station to supply heat to buildings located far away. Therefore, the energy utilization efficiency can be improved, and the environmental pollution caused by heating in winter can be effectively reduced.

The embodiment of the disclosure provides a heat recovery heating system, which is used for recovering indoor heat and using the recovered heat for heating.

Fig. 2 schematically shows a structural composition diagram of a heat recovery heating system according to an embodiment of the present disclosure.

As shown in fig. 2, the heat recovery heating system includes a heat source subsystem 200 and a heating subsystem 300. Wherein: the heat source subsystem 200 includes a cooling unit 210 and a heat pump unit 220. The cooling unit 210 is provided with a heat recovery device 211 inside, and the heat recovery device 211 is used for cooling the air in the data center 110 by using a cooling fluid and obtaining heat in the air; the heat pump unit 220 is configured to obtain a heating fluid at a predetermined temperature by using heat obtained from the cooling fluid and output the heating fluid; the heating subsystem 300 is configured to provide heat using at least a heating fluid at a predetermined temperature.

According to the embodiment of the present disclosure, the heat recovery device 211 may be, for example, a heat recovery coil, the heat recovery coil is connected to the heat pump unit 220, and water supply and return interfaces of the heat recovery coil are respectively connected to the water supply and

return pipes

402 and 401 on the heat source side of the heat pump. The connection pipeline is also provided with a circulating water pump 501, and the circulating water pump 501 can be specifically arranged on the heat source side water return pipeline 401 of the heat pump unit. Under the action of the circulating water pump 501, the cooling circulating water with a low temperature delivered from the heat source side 221 of the heat pump unit 220 can be circulated to the heat recovery coil through the heat source side water supply line 402 of the heat pump unit. The heat recovery coil pipe cools all or part of the air in the machine room by using the cooling circulating water and absorbs the waste heat in the air, and the heat circulating water with higher temperature after absorbing the heat returns to the heat source side 221 of the heat pump unit 220 through the heat source side water return pipeline 401. The heat pump unit 220 performs work to utilize the heat carried by the thermal circulation water, and the heat is transferred to the heating fluid (for example, water) of the heat pump unit heating side 222, so as to obtain the heating fluid (for example, hot water with a temperature of 80 ℃) at a predetermined temperature on the heating side 222.

The heat supply side 222 of the heat pump unit is connected to the heat supply subsystem 300 through a heat pump unit heat supply side water supply pipeline 403 and a heat pump unit heat supply side water return pipeline 404. A circulating water pump 502 is arranged on the connecting pipeline, and the circulating water pump 502 is specifically arranged on the heat supply side water return pipeline 404 of the heat pump unit. Under the action of the circulating water pump 502, the heating fluid with the predetermined temperature obtained from the heating side 222 of the heat pump unit 220 can be circulated to the heating subsystem 300 through the heat pump unit hot side water supply pipeline 403. The heating subsystem 300 provides heat to the end user 120 using heat carried by the heating fluid, which is delivered back to the heating side 222 of the heat pump assembly after releasing the heat.

The water supply temperature of the heat source side 221 of the heat pump unit can be 16 ℃, and the water return temperature can be 21 ℃ so as to ensure that the air supply temperature of the heat pump unit reaches 25 ℃; the water supply temperature of the heat pump unit heat supply side 222 can be 80 ℃, and the water return temperature can be 40 ℃.

Fig. 3 schematically illustrates an application scenario diagram of a heat source subsystem according to an embodiment of the present disclosure.

As shown in fig. 3, a plurality of cabinets 111 and supporting facilities are provided in the data center 110, and after the data machine room is put into operation, the indoor hot return air temperature can be maintained at 35 to 37 ℃, which is a condition for long-term stable heat source. The indoor air of the data center 110 is circulated by using a circulating fan, a cooling unit 210 is arranged on the air circulating loop, and a return air heat channel 112, a hot return air ceiling 113, an air supply static pressure box 114, an air supply cold channel 115 and a heat recovery equipment room 116 are arranged in the data center. The heat dissipated by the cabinet 111 enters the cooling unit 210 through the return air heat channel 112 and the hot return air ceiling 113 along with the circulating air, and is cooled by the cooling effect of the heat recovery device 211 in the cooling unit 210 to obtain the cooled circulating air, and meanwhile, the heat recovery device 211 absorbs the heat carried in the air. The cooled circulating air is delivered to the cabinet 111 through the blast plenum box 114 and the blast cooling duct 115 to cool the cabinet 111. The air supply temperature of the cooling unit 210 may reach 25 ℃ or lower. The heat absorbed by the heat recovery device 211 is circulated and transferred to the heat source side 221 of the heat pump unit 220 through the heat pump heat source side supply and return

pipes

402 and 401.

One or more cooling units 210 may be provided for one data center 110, and one or more cooling units 210 may be provided for one heat pump unit 220. In the embodiment of the present disclosure, the data center 110 is provided with not less than two cooling units 210, and the waste heat recovered by the not less than two cooling units 210 is transmitted to one heat pump unit 220.

According to the embodiment of the disclosure, indoor air of the data center is circularly cooled through the cooling unit, and the heat recovery device is additionally arranged in the cooling unit, so that the existing cooling unit arranged in the data center is simply improved, that is, waste heat in the data center can be recovered, the absorbed low-grade heat energy is converted into high-grade heat energy by the heat pump, and then the high-grade heat energy is utilized to realize heating. The high-efficiency data center waste heat recovery heating technology is realized, the energy utilization efficiency is improved, and the pollution of the traditional heating mode to the environment is reduced.

Fig. 4 schematically shows a structural composition diagram of a cooling unit according to an embodiment of the present disclosure.

As shown in fig. 4, according to an embodiment of the present disclosure, the cooling unit 210 includes an indoor-side circulation fan 212 and a cooling device 213 in addition to the heat recovery device 211 shown in, for example, fig. 2 and 3. As will be understood by those skilled in the art, since the heat recovery device 211 also has a cooling function, the cooling device 213 will be hereinafter referred to as "second cooling device 213" for the sake of distinction from the heat recovery device 211.

The heat recovery device 211, the indoor-side circulation fan 212, and the second cooling device 213 are provided in this order in the direction from the indoor return air side to the air supply side of the cooling unit 210. According to the embodiment of the present disclosure, in the first condition, the heat recovery device 211 and the circulation fan 212 are turned on, and the indoor air is cooled and heat recovered by the heat recovery device 211; in the second condition, the circulation fan 212 and the second cooling device 213 are turned on, and the indoor air is cooled by the second cooling device 213. Wherein the first condition includes being in a predetermined heating time period or the outdoor temperature being lower than a predetermined temperature, and the second condition includes being in a predetermined non-heating time period or the outdoor temperature being not lower than the predetermined temperature.

For example, a circulator blower may be disposed within the cooling unit 210 for circulating air within the data center compartment. The side of the cooling unit 210 receiving the high temperature air is the return air side, and the side discharged after cooling is the supply air side. The heat recovery device 211 may be disposed at an indoor air return side in the cooling unit, and the heat recovery device 211, the circulation fan 212, and the second cooling device 213 may be disposed in order from the return air side to the supply air side.

Under the condition that the temperature is lower in winter, a heating mode is started, the heat recovery working condition is adopted for operation, meanwhile, the heat recovery device 211, the circulating fan 212, the heat pump unit 220 and the circulating water pumps 501 and 502 are operated, indoor air is cooled and heat recovered by the heat recovery device 211 and the heat pump unit 220, and recovered waste heat is used for heating.

Under the condition that the temperature is higher in non-winter, the second cooling device 213 and the circulating fan 212 operate, the heat recovery device 211, the heat pump unit 220 and the circulating water pumps 501 and 502 are turned off, and the indoor air is cooled by the second cooling device 213.

According to an embodiment of the present disclosure, in a case where heat supply is required in winter, the heat recovery heating system cools and recovers heat from indoor air using the heat recovery device. And under the condition that heat supply is not needed in winter, the heat recovery device and the heat pump are turned off, and the heat recovery heat supply system utilizes the second cooling device to cool the indoor air. Therefore, different operation modes can be switched according to actual conditions, the operation is simple, and the adaptability to the environment is good.

According to an embodiment of the present disclosure, the cooling unit 210 may be, for example, an indirect evaporative cooling unit. In a high-altitude area with low ambient temperature all the year round, the indirect evaporative cooling unit can greatly reduce the energy consumption of the data center air conditioning system. The application prospect is wide at present. The heat recovery heating system provided by the embodiment of the disclosure can recover and supply heat to the waste heat of the data center based on the indirect evaporative cooling unit, namely, the heat recovery device is additionally arranged in the indirect evaporative cooling unit, so that the overall operation energy consumption of the data center can be further reduced.

The second cooling device 213 includes an air-to-air heat exchanger 2131 for cooling the indoor air with the outdoor air. The second cooling device 213 may further include an outdoor side exhaust fan 2132 and an outdoor side air inlet grille 2133, under the action of the outdoor side exhaust fan 2132, indoor circulating air in the data center enters the air-to-air heat exchanger 2131 through the outdoor side air inlet grille 2133, and indoor side air exchanges heat with outdoor side air in the air-to-air heat exchanger 2131 to cool indoor side air (to reach an indoor side air supply temperature of 25 ℃).

The cooling unit 210 may also include a supplemental cooling device 214. When the outdoor environment temperature is relatively high and the heat exchange capability of the second cooling device 213 is insufficient, for example, the heat exchange capability of the second cooling device 213 cannot guarantee that the indoor supply air temperature reaches 25 ℃, the supplementary cooling device 214 may be turned on to perform supplementary cooling on the indoor air to ensure that the supply air temperature reaches 25 ℃, and the supplementary cooling device 214 may be a DX (mechanical refrigeration) cooling coil, for example.

Fig. 5 schematically shows a structural composition diagram of a heat recovery heating system according to another embodiment of the present disclosure.

As shown in fig. 5, according to an embodiment of the present disclosure, the heating subsystem 300 includes a heating station 310 and a heat exchange station 320. The heat supply station 310 at least collects the heat supply fluid delivered by the plurality of heat pump units 220 and distributes the heat supply fluid to the heat exchange station 320. The heat exchange station 320 obtains a terminal circulating fluid of a predetermined temperature using the heating fluid delivered from the heating station 310 and delivers the terminal circulating fluid to the corresponding end user 120 for heating.

According to the embodiment of the present disclosure, one or more heat pump units 220 and one or more heat exchange stations 320 may be provided for each heat supply station 310.

For example, the heating plant 310 may be deployed within a data center campus. The heating plant 310 may be adapted with a number of heat source subsystems 200 to utilize a plurality of heat source subsystems 200 to deliver heat sources to the heating plant 310. Meanwhile, the heating plant 310 may be adapted with a plurality of user heat exchange stations 320 to supply heat to a plurality of end users 120.

The heat source subsystem 200 is responsible for waste heat recovery in the data center as part of the heat source for the heating system.

The heat supply station 310 is responsible for collecting heat from the heat source subsystems 200, and the heat supply station 310 is connected to the heat pump units 220 to collect heat and distribute heat (e.g., heat carried by hot water) to the user heat exchange stations 320 according to load demands and operation of the environmental control system.

The heat exchange station 320 is a control distribution part of the heating system and is responsible for producing end circulation fluid (for example, hot water with a temperature of 60 ℃ or 75 ℃) with different temperatures according to the actual demand of the end user 120, and the end user 120 is a heat consumption part of the heating system. The heat exchange station 320 is provided with a heat exchanger 321, primary side water supply and return

pipes

431 and 432 of the heat exchanger 321 are connected to the heat supply station 310, and secondary side water supply and return

pipes

433 and 434 of the heat exchanger 321 are connected to the end user 120. The heat supply fluid of the predetermined temperature collected by the heat supply station 310 enters one side of the heat exchanger 321 through the primary water supply pipeline 431 of the heat exchanger 321, the heat exchange station 320 exchanges heat with the heat supply fluid of the one side to obtain the terminal circulation fluid of the predetermined temperature of the other side, and the terminal circulation fluid is delivered to the corresponding end user 120 through the secondary water supply pipeline 433 for supplying heat.

The primary-side water supply/return pipe 431 is provided with a three-way valve 621. The opening of the electric three-way valve 621 can be controlled according to the load demand of the end heat user to adjust the water supply amount entering the heat exchanger 321. The surplus water supply is directly returned to the primary water return line 432 of the heat exchanger through the bypass line 435, thereby adjusting the heating output of the heating plant 310.

According to an embodiment of the present disclosure, the heat source subsystem 200 may be connected to a heat supply station 310, which applies heat to a building located at a relatively long distance, and a heat exchange station, which may produce hot water at different temperatures for delivery to the end heat consumer 120 according to the actual demand of the end heat consumer.

Fig. 6 schematically shows a structural composition schematic diagram of a heating plant according to an embodiment of the present disclosure.

As shown in fig. 6, according to an embodiment of the present disclosure, the heat supply station 310 may include a heat supply station heat source device 311 for being turned on in case the heat source subsystem 200 fails to supply heat or is insufficient in heat supply capacity, to supply heat to the heat exchange station 320 as a backup heat source. The heat supply plant heat source device 311 may be, for example, an electric boiler, and supplies heat as a backup heat source. As will be understood by those skilled in the art, since the heat source subsystems 200 each also have the function of a heat source, the heat supply station heat source device 311 will be hereinafter referred to as "second heat source device 311" for the sake of distinction from the heat source subsystem 200.

According to the embodiment of the present disclosure, the heat supply station may further include a heat storage device 312, configured to store heat by using the heat pump unit 220 or the second heat source device 311 during the period of low-ebb power supply of the power grid, and provide heat to the heat exchange station 320 during the period of peak power supply of the power grid. The heat storage device 312 may be, for example, a heat storage tank that stores hot water to regulate the operation of the heating system.

The heating plant 310 may also include a circulating water pump (511/512) and an electrically operated valve (611-.

According to embodiments of the present disclosure, the heat recovery heating system may be provided with the following operation modes:

A. the heat pump unit is in an independent heat supply mode;

B. a second heat source device independent heating mode;

C. the heat storage equipment is in an independent heat supply mode;

D. a thermal storage device thermal storage mode.

Wherein: in the heat pump unit heat supply mode, the heat pump unit 220 is used alone to supply heat to the heat exchange station 320; in the second heat-source device heat supply mode, the second heat-source device 311 is solely used to supply heat to the heat exchange station 320; in the thermal storage device heating mode, the thermal storage device 312 is utilized alone to provide heat to the heat exchange station 320; in the thermal storage device heat storage mode, the heat pump unit 220 or the second heat source device 311 supplies a part of the heat to the heat exchange station 320, and the other part of the heat is supplied to the thermal storage device 312, so that the thermal storage device 312 stores the heat.

Fig. 7 schematically shows a supply and return water flow path in an independent heating mode of a heat pump unit according to an embodiment of the disclosure.

As shown in fig. 7, in the heat pump unit independent heating mode, the fluid flow path in the heating station 310 is shown by the thick line in the heating station. In this case, the heat supply station 310 may collect a plurality of heat pump units 220 and then directly deliver the hot water to the heat exchange station 320.

When the data center 110 is in a stable service operation, the heat pump unit 220 can operate the heat pump unit independent heating mode a under the condition that a stable heat source can be provided. In the operation mode, the cooling unit 210 and the heat pump unit 220 in the data center are started to work, the heat pump unit heat source circulating water pump 501 and the heat supply circulating water pump 502 are operated, the electric valve 611 is opened, other electric valves are cut off, and the heat pump unit heat supply and return

water pipes

403, 411 and 404 and the heat supply pipe network heat supply and return water

main pipes

417 and 418 conveyed to the user heat exchange station 320 are connected.

Under the independent heat supply mode of heat pump set, the water supply route in the heat supply station is: the hot water output by the heat pump unit passes through the heat supply side

water supply pipelines

403 and 411 of the heat pump unit, is connected to the water supply main 417, and then enters the heat exchange station 320. The hot water becomes cold water after heat is dissipated in the heat exchange station 320 through heat exchange, the heat exchange station conveys the heat recovery pump unit 220, and a return water path in the heat supply station is as follows: the cold water output by the heat exchange station returns to the heat pump unit 220 through the water return header 418 and the heat pump unit hot side water return pipe 404. The cold water is only low in temperature relative to the hot water before the heat exchanger, and does not mean water with a very low temperature.

Fig. 8 schematically illustrates a supply and return water flow path diagram of a second heat source apparatus independent heating mode according to an embodiment of the present disclosure.

As shown in fig. 8, when the data center 110 is in the initial operation of the service, and the heat pump unit 220 cannot provide a stable heat source or the heat pump unit 220 is in the maintenance failure condition, the second heat source device independent heating mode B may be turned on. In the second heat source equipment independent heating mode, the fluid flow path in the heating station is as shown by the thick line in the heating station. In the operation mode, the cooling unit 210, the heat pump unit 220, the heat pump unit heat source circulating water pump 501 and the heat supply circulating water pump 502 in the data center stop operating, the second heat source equipment 311 and the second heat source equipment heat supply circulating water pump 511 start operating, the

electric valves

613 and 616 are opened, other electric valves are cut off, the second heat source equipment water supply and return pipelines (413, 415/414 and 416) are respectively communicated with the heat supply and return pipe network water supply and return

main pipes

417 and 418, and the second heat source equipment 311 independently supplies heat to the user heat exchange station 320.

Under the independent heat supply mode of second heat source equipment, the water supply route in the heat supply station is: the hot water output from the second heat source device 311 passes through the second heat source device

water supply pipes

413 and 415, is introduced into the water supply manifold 417, and then enters the heat exchange station 320 through the water supply manifold 417. The return water path in the heat supply station is as follows: cold water output from heat exchange station 320 is returned to second heat-source device 311 via water return manifold 418 and second heat-source device

water return lines

416 and 414.

FIG. 9 schematically illustrates a supply and return water flow path for an independent heating mode of a thermal storage device according to an embodiment of the disclosure.

As shown in fig. 9, when the user heat exchange station 320 is under a condition of a small heat load or a power grid is in a peak power supply period, the heat storage device independent heating mode C is turned on. In the heat storage device independent heating mode, the fluid flow path in the heating station is as shown by the thick lines in the heating station. In the operation mode, the cooling unit 210, the heat pump unit 220, the heat pump unit heat source circulating water pump 501, the heat supply circulating water pump 502, the second heat source equipment 311 and the second heat source equipment heat supply circulating water pump 511 stop operating, the heat storage equipment heat supply circulating water pump 512 starts operating, the electric valve 617 is opened, other electric valves are cut off, the heat storage equipment heat supply and return

water pipes

419 and 420 at the heat supply side are communicated with the heat supply and return water

main pipes

417 and 418 of the heat supply pipe network, and the heat storage equipment 312 independently supplies heat to the user heat exchange station 320.

Under the independent heat supply mode of heat accumulation equipment, the water supply route in the heat supply station is: hot water output from the thermal storage device 312 enters the heat exchange station 320 through the thermal storage device heating-side water supply pipe 419 and the water supply header 417. The return water path is as follows: cold water output by the heat exchange station is returned to the thermal storage device 312 via a water return manifold 418 and a thermal storage device heat supply side water return line 420.

When the power supply is in the valley power supply period of the power grid, the heat storage mode D of the heat storage equipment can be started, and the operation mode can be started under the independent heat supply working condition of the heat pump unit or the independent heat supply working condition of the second heat source equipment.

FIG. 10 schematically illustrates a supply and return water flow path schematic of a thermal storage device in a thermal storage mode according to an embodiment of the disclosure.

As shown in fig. 10, if the heat storage mode of the heat storage device is started under the independent heat supply condition of the heat pump unit, the devices, the water pump and the valves in the independent heat supply mode of the original heat pump unit are all kept in the original state, and then the

electric valves

612, 614, 615 and 616 are opened. A part of hot water in a hot water supply side water supply pipe 403 of the heat pump unit is connected to a water supply main 417 through a pipeline 411 to supply heat to the heat exchange station 320; another portion of the hot water is supplied to the thermal storage device through a portion of the piping 412 and the piping 413. The heat storage device return water is connected to a heat supply pipe network return water header 418 through a part of pipelines of the pipeline 414 and the pipeline 416, so that heat storage of the heat storage device 312 by the heat pump unit 220 and heat supply of the heat exchange station are realized.

FIG. 11 schematically illustrates a supply and return water flow path schematic of a thermal storage device in a thermal storage mode according to another embodiment of the disclosure.

As shown in fig. 11, if the heat storage mode of the heat storage device is turned on under the independent heat supply condition of the second heat source device, the water pump and the valve under the independent heat supply condition of the original second heat source device are all kept in the original state, and then the electrically operated

valves

614 and 615 are opened. A part of the hot water in the second heat source equipment water supply pipe 413 is connected to a water supply header 417 through a pipe 415; the other part supplies water to the thermal storage device 312. The return water of the heat storage tank is connected to a return water pipe 414 of the second heat source device, so that the second heat source device can store heat in the heat storage and storage device 312 and supply heat to the heat exchange station.

As shown in fig. 6 to 11, according to an embodiment of the present disclosure, the heat recovery heating system further includes a pipe network, the pipe network including: the system comprises heat pump unit heat source side water supply and return

pipelines

402 and 401, heat pump unit heat source side water supply and return

pipelines

403 and 411, second heat source equipment water supply and return

pipelines

413 and 414, heat storage equipment heat supply and return

pipelines

419 and 420, water supply and return

main pipelines

417 and 418, heat exchange station primary side water supply and return

pipelines

431 and 432, and heat exchange station secondary side water supply and return

pipelines

433 and 434.

The heat pump unit heat source side water supply and return

pipes

402 and 401 connect the cooling unit 210 and the heat pump unit 220.

The heat pump unit heat supply and water supply and return

pipelines

403, 411 and 404 are connected with the heat pump unit 220 and the water supply and return

main pipelines

417 and 418, and are connected with the heat pump unit 220 and the heat storage equipment 312.

The second heat source equipment water supply and return

pipes

413 and 414 and 416 are connected with the second heat source equipment 311 and the water supply and return

main pipes

417 and 418, and are connected with the second heat source equipment 311 and the heat storage equipment 312.

Heat storage device hot and hot side water supply and return

pipes

419 and 420 connect the heat storage device 312 and water supply and return

manifolds

417 and 418.

The water supply and return

main pipelines

417 and 418 are connected with primary side water supply and return

pipelines

431 and 432 of the heat exchange station; secondary side water supply and return

conduits

433 and 434 of the heat exchange station connect the heat exchange station 320 with end users.

According to the embodiment of the disclosure, the temperature of the supply water at the heat source side of the heat pump unit is 16 ℃, and the temperature of the return water is 21 ℃; the temperature of the water supply at the heat supply side of the heat pump unit is 80 ℃, and the temperature of the return water is 40 ℃; the water supply temperature of the second heat source equipment is 80 ℃, and the return water temperature is 40 ℃; the temperature of the water supply at the heat supply side of the heat storage equipment is 80 ℃, and the temperature of the return water is 40 ℃.

Those skilled in the art will appreciate that various combinations and/or combinations of features recited in the various embodiments and/or claims of the present disclosure can be made, even if such combinations or combinations are not expressly recited in the present disclosure. In particular, various combinations and/or combinations of the features recited in the various embodiments and/or claims of the present disclosure may be made without departing from the spirit or teaching of the present disclosure. All such combinations and/or associations are within the scope of the present disclosure.

The embodiments of the present disclosure have been described above. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments are described separately above, this does not mean that the measures in the embodiments cannot be used in advantageous combination. The scope of the disclosure is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the present disclosure, and such alternatives and modifications are intended to be within the scope of the present disclosure.

Claims

1. A heat recovery heating system for recovering heat in a room and using the recovered heat for heating, comprising a heat source subsystem and a heating subsystem, wherein:

the heat source subsystem includes:

the cooling unit comprises a heat recovery device, wherein the heat recovery device is used for cooling the indoor air by using cooling fluid and acquiring heat in the air;

the heat pump unit is used for outputting heat supply fluid with a preset temperature by utilizing the heat acquired by the cooling fluid;

the heating subsystem is used for heating at least by using the heating fluid with the preset temperature.

2. The system of claim 1, wherein,

the cooling unit also comprises a circulating fan and a cooling device;

the heat recovery device, the circulating fan and the cooling device are sequentially arranged along the direction from the indoor air return side to the air supply side of the cooling unit;

under a first condition, the heat recovery device and the circulating fan are started, and the heat recovery device is used for cooling and recovering heat of indoor air;

under a second condition, the circulating fan and the cooling device are started, and the cooling device is used for cooling indoor air;

wherein the first condition includes being in a predetermined heating time period or the outdoor ambient temperature being below a predetermined temperature, and the second condition includes being in a predetermined non-heating time period or the outdoor ambient temperature being not below a predetermined temperature.

3. The system of claim 1, wherein,

the heat supply subsystem comprises a heat supply station and a heat exchange station;

the heat supply station is at least used for collecting heat supply fluid conveyed by the heat pump units and distributing the heat supply fluid to the heat exchange station;

the heat exchange station is used for obtaining terminal circulating fluid with a preset temperature by utilizing the heat supply fluid conveyed by the heat supply station, and conveying the terminal circulating fluid to corresponding terminal heat users for heat supply.

4. The system of claim 3, wherein the heat supply station comprises a heat supply station heat source device configured to turn on to provide heat to the heat exchange station as a backup heat source in the event that the heat source subsystem fails to provide heat or is not sufficiently capable of providing heat.

5. The system of claim 4, wherein the heat supply station further comprises a thermal storage device for storing heat with the heat pump unit or the heat supply station heat source device during periods of low-peak power supply from the power grid and providing heat to the heat exchange station during periods of peak power supply from the power grid.

6. The system of claim 5, wherein the heat recovery heating system has at least a heat pump unit heating mode, a heating plant heat source device heating mode, a thermal storage device heating mode, and a thermal storage device thermal storage mode, wherein:

in the heat supply mode of the heat pump unit, the heat pump unit is independently utilized to supply heat to the heat exchange station;

under the heat supply mode of the heat supply station heat source equipment, the heat supply station heat source equipment is independently utilized to provide heat for the heat exchange station;

in the heat storage equipment heat supply mode, the heat storage equipment is independently utilized to supply heat to the heat exchange station;

and in the heat storage mode of the heat storage equipment, the heat pump unit or the heat source equipment of the heat supply station supplies part of heat to the heat exchange station, and the other part of heat is supplied to the heat storage equipment, so that the heat storage equipment stores heat.

7. The system of claim 5, further comprising a pipe network, the pipe network comprising: a heat pump unit heat source side water supply and return pipeline, a heat pump unit heat supply side water supply and return pipeline, a second heat source equipment water supply and return pipeline, a heat storage equipment heat supply side water supply and return pipeline, a water supply and return main pipeline, a heat exchange station primary side water supply and return pipeline and a heat exchange station secondary side water supply and return pipeline;

the water supply and return pipeline on the heat source side of the heat pump unit is connected with the cooling unit and the heat pump unit;

the heat pump unit heat supply side water supply and return pipeline is connected with the heat pump unit and the water supply and return main pipeline, and is connected with the heat pump unit and the heat storage equipment;

the water supply and return pipeline of the heat supply station heat source equipment is connected with the heat supply station heat source equipment and the water supply and return main pipeline, and is connected with the heat supply station heat source equipment and the heat storage equipment;

the heat storage equipment heat supply side water supply and return pipeline is connected with the heat storage equipment and the water supply and return main pipeline;

the water supply and return main pipeline is connected with a primary side water supply and return pipeline of the heat exchange station;

and the secondary side water supply and return pipeline of the heat exchange station is connected with the heat exchange station and a terminal user.

8. The system of claim 1, wherein the chiller train comprises an indirect evaporative chiller train.

9. The system of claim 2, wherein:

the cooling device comprises an air-air heat exchanger; the air-air heat exchanger is used for cooling indoor air by utilizing outdoor air;

the cooling unit further comprises a supplementary cooling device, the supplementary cooling device comprises a cooling coil, and the cooling coil is used for being opened when the heat exchange capacity of the air-air heat exchanger is insufficient to supplement and refrigerate the indoor air.

10. The system of claim 3, wherein:

one or more cooling units are arranged aiming at each heat pump unit;

and aiming at each heat supply station, one or more heat pump units and one or more heat exchange stations are arranged.