CN113237157A - Composite heat pump system suitable for subway station in severe cold area - Google Patents
Composite heat pump system suitable for subway station in severe cold area Download PDFInfo
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- CN113237157A CN113237157A CN202110314865.5A CN202110314865A CN113237157A CN 113237157 A CN113237157 A CN 113237157A CN 202110314865 A CN202110314865 A CN 202110314865A CN 113237157 A CN113237157 A CN 113237157A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/04—Other domestic- or space-heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/40—Geothermal heat-pumps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a composite heat pump system suitable for subway stations in severe cold areas, which comprises a ground source heat pump system, a water loop heat pump system and a heat supply system, wherein the ground source heat pump system comprises a ground source heat pump unit, a ground buried pipe and an indoor heat exchanger; the water loop heat pump system comprises a refrigerating unit and a heating unit; the heating system comprises a hot water supply pipe and a hot water return pipe. Wherein the water-loop heat pump system and the heating system are only started in winter. The invention utilizes the ground source heat pump system to provide cold for the public area, the management room and the equipment room of the station in summer and provides heat for the buildings around the subway in winter. And in winter, the heat of the equipment room is transferred to a station public area and a management room by using a water-loop heat pump system. The invention realizes the cold and heat balance of underground soil of the subway station, utilizes the waste heat of the equipment room, meets the heating requirement of subway personnel rooms in winter, heats buildings around the subway, and fully exerts the advantages of high efficiency and energy saving of the composite heat pump system.
Description
Technical Field
The invention relates to the field of heat pumps, and discloses a composite heat pump system suitable for subway stations in severe cold regions.
Background
With the construction of subways in more and more cities, the problem of energy consumption of subway stations is also concerned. According to statistics, the energy consumption of the air conditioner accounts for about 25% of the total energy consumption of the iron. The conventional method for subway stations in severe cold areas comprises the following steps: the cold water machine set and the conventional cold source of the cooling tower are adopted in summer, the rooms for equipment area management in winter adopt multi-split air-conditioning heating, the rooms for equipment adopt outdoor fresh air refrigeration, and the public area adopts a hot air curtain or electric heating. This causes the condition that the heating efficiency of the station public area and the management room in winter is low, and a large amount of waste heat of the equipment room is wasted.
Residential districts or commercial office buildings generally exist at the periphery of the subway station, and if the subway station adopts a ground source heat pump system, the subway station provides cold energy for the station in summer and provides heat for buildings at the periphery of the station in winter. The system not only can exert the advantages of high efficiency and energy conservation of the ground source heat pump system, maintain the cold and hot balance of the underground soil of the station, but also can reduce the heat supply requirement of the municipal pipe network.
Disclosure of Invention
The invention provides a composite heat pump system suitable for a subway station in a severe cold area, aiming at the current situation of the existing subway station air conditioning system.
In order to solve the technical problem, the invention is solved by the following technical scheme: the utility model provides a compound heat pump system suitable for severe cold district subway station which characterized in that: the system comprises a ground source heat pump system, a water loop heat pump system and a heat supply system, wherein the ground source heat pump system comprises a ground source heat pump unit, a buried pipe and an indoor heat exchanger; the water-loop heat pump system comprises a refrigerating unit and a heating unit, and the refrigerating unit and the heating unit are connected through a pipeline; the heat supply system comprises a hot water supply pipe and a hot water return pipe which are connected to buildings around the station; indoor heat exchangers and heating units are arranged in the rooms for the station public area and management, and refrigerating units and indoor heat exchangers are arranged in the rooms for equipment.
Wherein the water-loop heat pump system and the heating system are only started in winter. The composite heat pump system utilizes the ground source heat pump system to provide cold for the public area of the station, the management room and the equipment room in summer, and utilizes the water loop heat pump system to transfer the heat of the equipment room to the public area of the station and the management room in winter so as to provide heat for the public area of the station and the management room.
Furthermore, the end a of the first three-way valve is connected with a hot water supply pipe, the end b is connected with the user side of the ground source heat pump unit, and the end c is connected with the indoor heat exchanger; and the end a of the second three-way valve is connected with a hot water return pipe, the end b of the second three-way valve is connected with an indoor heat exchanger, and the end c of the second three-way valve is connected with the user side of the ground source heat pump unit.
Further, in summer, when the ground source heat pump system is in a refrigeration working condition, the ground source side of the ground source heat pump unit is a condenser, the user side of the ground source heat pump unit is an evaporator, the ends b and c of the first three-way valve are opened, the end a is closed, the ends b and c of the second three-way valve are opened, and the end a is closed; the low-temperature chilled water generated by the evaporator of the ground source heat pump unit enters from the end b of the first three-way valve, exits from the end c, and exchanges heat through indoor heat exchangers of a station public area, a management room and an equipment room so as to refrigerate the station public area, the management room and the equipment room, and the chilled water after temperature rise enters from the end b of the second three-way valve, exits from the end c and enters into the evaporator again;
in winter, when a ground source heat pump system is in a heating working condition, the ground source side of the ground source heat pump unit is an evaporator, the user side of the ground source heat pump unit is a condenser, the end a and the end b of a first three-way valve are opened, the end c is closed, the end a and the end c of a second three-way valve are opened, the end b is closed, high-temperature hot water generated by the condenser of the ground source heat pump unit enters the end b and exits the end a of the first three-way valve to heat buildings around a station, and the cooled hot water enters the end a and exits the end c of the second three-way valve and enters the condenser again;
in winter, the water-loop heat pump system is started, the refrigerating unit in the equipment room is used for refrigerating, waste heat of the equipment room enters the heating unit through the heat exchange medium to supply heat to the station public area and the management room, and the cooled heat exchange medium enters the equipment room again for refrigerating of the refrigerating unit.
Further, indoor heat exchangers located in a station public area, a management room and an equipment room are connected in parallel.
Furthermore, the buried pipe is a vertical buried pipe with the buried depth of 90-110 m.
A subway station, in winter, may be 450000m2～70000 m2Residential building or 15000 m2～25000 m2To provide heating needs. Compared with the traditional air-conditioning heating system (a cold water unit and a cooling tower are adopted for cooling in summer, electric heating or multi-split heating is adopted in winter, and a municipal heating pipe network is adopted for heating in a house), the energy-saving rate of the system is 20-35%.
Furthermore, the cold and heat balance of the water-loop heat pump system is realized by controlling the temperature (12-18 ℃) of the station public area.
Furthermore, the tail end of a heating unit or a refrigerating unit of the water-loop heat pump can adopt a fan coil system, a radiation system or a full-air system.
Furthermore, the temperature of the underground soil in the severe cold region is lower, and in order to increase the heat exchange effect between the buried pipe and the soil, an antifreezing solution can be added into the heat exchange medium of the buried pipe, so that the temperature difference between the heat exchange medium of the buried pipe and the soil is increased.
Furthermore, the backfill material of the buried pipe can adopt materials such as cast concrete, backfill sand and stone bulk materials or backfill soil and the like.
Compared with the prior art, the invention has the following beneficial effects: the invention adopts the ground source heat pump and the water loop heat pump as cold and heat sources of the air conditioner, thereby not only effectively controlling the cold and heat balance problem of the ground source heat pump and the water loop heat pump, but also playing the advantages of high efficiency and energy saving of the heat pump system. The ground source heat pump system provides heat for the surrounding buildings of the station in winter, and reduces the heat supply requirement of the municipal pipe network. By adopting the water-loop heat pump system, the waste heat of the equipment room is transferred to a station public area and a management room in winter, so that the heat supply energy consumption is reduced.
Drawings
Fig. 1 is a composite heat pump system suitable for subway stations in severe cold regions.
In the figure: the system comprises a ground source heat pump unit 1, a ground source heat pump unit 2, a ground source side of the ground source heat pump unit 3, a ground buried pipe 4, an indoor heat exchanger 5, a heating unit 6, a refrigerating unit 7, a hot water return pipe 8 and a hot water supply pipe 9.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings, in which reference is made to the following examples, and in which:
the utility model provides a compound heat pump system suitable for severe cold district subway station which characterized in that: the system comprises a ground source heat pump system, a water loop heat pump system and a heat supply system, wherein the ground source heat pump system comprises a ground source heat pump unit 1, a buried pipe 4 and an indoor heat exchanger 5, the ground source side 2 of the ground source heat pump unit is connected with the buried pipe 4, one end of the indoor heat exchanger 5 is connected with the heat supply system and the user side 3 of the ground source heat pump unit through a first three-way valve S1, and the other end of the indoor heat exchanger 5 is connected with the heat supply system and the user side 3 of the ground source heat pump unit through a second three-way valve S2; the water loop heat pump system comprises a refrigerating unit 7 and a heating unit 6; the heating system comprises a hot water supply pipe 9 and a hot water return pipe 8, an indoor heat exchanger and a heating unit are arranged in the station public area and the room for management, and a refrigerating unit and an indoor heat exchanger are arranged in the room for equipment. Wherein the water-loop heat pump system and the heating system are only started in winter.
Further, when the ground source heat pump system is in a refrigeration working condition, the ground source side 2 of the ground source heat pump unit is a condenser, the user side 3 of the ground source heat pump unit is an evaporator, the end a of the first three-way valve S1 is connected with a hot water supply pipe, the end b is connected with the evaporator, and the end c is connected with the indoor heat exchanger; and the end a of the second three-way valve is connected with a hot water return pipe, the end b is connected with the indoor heat exchanger, the end c is connected with the evaporator, the end b and the end c of the first three-way valve S1 are opened, the end a is closed, the end b and the end c of the second three-way valve S2 are opened, and the end a is closed.
When the ground source heat pump system is in a heating working condition, the ground source side 2 of the ground source heat pump unit is an evaporator, the user side 3 of the ground source heat pump unit is a condenser, the end a and the end b of the first three-way valve S1 are opened, the end c is closed, the end a and the end c of the second three-way valve S2 are opened, and the end b is closed.
Further, the indoor heat exchangers 5 located in the station public area, the management room, and the equipment room are connected in parallel.
Furthermore, the buried pipe 4 is a vertical buried pipe with a buried depth of 90-110 m.
Further, a subway station, in winter, may be 450000m2～70000 m2Residential building or 15000 m2～25000 m2To provide heating needs.
Furthermore, compared with the traditional air-conditioning heating system (a cold water unit and a cooling tower are adopted for cooling in summer, electric heating or multi-split heating is adopted in winter, and a municipal heating pipe network is adopted for heating in a house), the energy-saving rate of the system is 20-35%.
Furthermore, the cold and heat balance of the water-loop heat pump system is realized by controlling the temperature (12-18 ℃) of the station public area.
Furthermore, the heating unit 6 or the refrigerating unit 7 of the water-loop heat pump can adopt a fan coil system, a radiation system or an all-air system at the tail end.
Further, the temperature of the underground soil in the severe cold region is low, and in order to increase the heat exchange effect between the buried pipe 4 and the soil, an anti-freezing solution can be added into the heat exchange medium of the buried pipe 4, so that the temperature difference between the heat exchange medium of the buried pipe 4 and the soil is increased.
Furthermore, the backfill material of the buried pipe 4 can adopt materials such as cast concrete, backfill sand and stone bulk materials or backfill soil and the like.
Examples
In summer, the ground source side 2 of the ground source heat pump unit is a condenser, and the user side 3 of the ground source heat pump unit is an evaporator. The temperature of inlet and outlet water of the buried pipe 4 is 37 ℃/32 ℃, and the temperature of supply/return water of the ground source heat pump unit 1 is 7 ℃/12 ℃. The low-temperature chilled water generated by the evaporator of the ground source heat pump unit 1 enters from the end b and exits from the end c of the first three-way valve S1, is subjected to heat exchange by the indoor heat exchangers 5 of the station public area, the management room and the equipment room, is heated to 12 ℃, enters from the end b and exits from the end c of the second three-way valve S2, and enters into the evaporator again.
In winter, the ground source side 2 of the ground source heat pump unit is an evaporator, and the user side 3 of the ground source heat pump unit is a condenser. The temperature of inlet and outlet water of the buried pipe 4 is 2 ℃/7 ℃, and the temperature of supply/return water of the ground source heat pump unit 1 is 45 ℃/40 ℃. High-temperature hot water generated by the condenser of the ground source heat pump unit 1 enters from the end b and exits from the end a of the first three-way valve S1 to heat buildings around the station, and the cooled hot water enters from the end a and exits from the end c of the second three-way valve S2 and enters into the condenser again.
In winter, the water-loop heat pump system is started. The refrigerating unit 7 in the equipment room refrigerates, and waste heat of the equipment room enters the heating unit 6 through heat exchange media such as refrigerant, so as to supply heat to the management room. And the cooled heat exchange medium enters the equipment room again for refrigeration of the refrigerating unit 7.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive effort by those skilled in the art.
Claims (8)
1. The utility model provides a compound heat pump system suitable for severe cold district subway station which characterized in that: the system comprises a ground source heat pump system, a water loop heat pump system and a heat supply system, wherein the ground source heat pump system comprises a ground source heat pump unit, a buried pipe and an indoor heat exchanger; the water-loop heat pump system comprises a refrigerating unit and a heating unit, and the refrigerating unit and the heating unit are connected through a pipeline; the heat supply system comprises a hot water supply pipe and a hot water return pipe which are connected to buildings around the station; indoor heat exchangers and heating units are arranged in the rooms for the station public area and management, and refrigerating units and indoor heat exchangers are arranged in the rooms for equipment.
2. The composite heat pump system suitable for the subway station in the severe cold area as claimed in claim 1, wherein: in summer, when the ground source heat pump system is in a refrigeration working condition, the ground source side of the ground source heat pump unit is a condenser, the user side of the ground source heat pump unit is an evaporator, the ends b and c of the first three-way valve are opened, the end a is closed, the ends b and c of the second three-way valve are opened, and the end a is closed; the low-temperature chilled water generated by the evaporator of the ground source heat pump unit enters from the end b of the first three-way valve, exits from the end c, and exchanges heat through indoor heat exchangers of a station public area, a management room and an equipment room so as to refrigerate the station public area, the management room and the equipment room, and the chilled water after temperature rise enters from the end b of the second three-way valve, exits from the end c and enters into the evaporator again;
in winter, when a ground source heat pump system is in a heating working condition, the ground source side of the ground source heat pump unit is an evaporator, the user side of the ground source heat pump unit is a condenser, the end a and the end b of a first three-way valve are opened, the end c is closed, the end a and the end c of a second three-way valve are opened, the end b is closed, high-temperature hot water generated by the condenser of the ground source heat pump unit enters the end b and exits the end a of the first three-way valve to heat buildings around a station, and the cooled hot water enters the end a and exits the end c of the second three-way valve and enters the condenser again;
in winter, the water-loop heat pump system is started, the refrigerating unit in the equipment room is used for refrigerating, waste heat of the equipment room enters the heating unit through the heat exchange medium to supply heat to the station public area and the management room, and the cooled heat exchange medium enters the equipment room again for refrigerating of the refrigerating unit.
3. The composite heat pump system suitable for the subway station in the severe cold area as claimed in claim 1, wherein: indoor heat exchangers located in a station public area, a management room and an equipment room are connected in parallel.
4. The composite heat pump system suitable for the subway station in the severe cold area as claimed in claim 1, wherein: the buried pipe is a vertical buried pipe, and the buried depth is 90-110 m.
5. The composite heat pump system suitable for the subway station in the severe cold area as claimed in claim 1, wherein: the tail end of a heating unit or a refrigerating unit of the water loop heat pump adopts a fan coil system, a radiation system or a full air system.
6. The composite heat pump system suitable for the subway station in the severe cold area as claimed in claim 1, wherein: the temperature of underground soil in severe cold areas is low, and in order to increase the heat exchange effect between the buried pipe and the soil, an antifreezing solution is added into the heat exchange medium of the buried pipe, so that the temperature difference between the heat exchange medium of the buried pipe and the soil is increased.
7. The composite heat pump system suitable for the subway station in the severe cold area as claimed in claim 1, wherein: the cold and heat balance of the water-loop heat pump system is realized by controlling the temperature of the station public area to be between 12 and 18 ℃.
8. The composite heat pump system suitable for the subway station in the severe cold area as claimed in claim 1, wherein: the backfill material of the buried pipe adopts cast concrete, backfill sand and stone bulk or backfill soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110314865.5A CN113237157A (en) | 2021-03-24 | 2021-03-24 | Composite heat pump system suitable for subway station in severe cold area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110314865.5A CN113237157A (en) | 2021-03-24 | 2021-03-24 | Composite heat pump system suitable for subway station in severe cold area |
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| CN113237157A true CN113237157A (en) | 2021-08-10 |
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| CN202110314865.5A Pending CN113237157A (en) | 2021-03-24 | 2021-03-24 | Composite heat pump system suitable for subway station in severe cold area |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413417A (en) * | 2021-12-22 | 2022-04-29 | 珠海格力电器股份有限公司 | Anti-freezing control method and device, storage medium and electronic equipment |
| CN115004990A (en) * | 2022-08-09 | 2022-09-06 | 山东鑫光节能科技有限公司 | Cherry planting temperature monitoring joint control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000074391A (en) * | 1998-06-18 | 2000-03-14 | Aisin Seiki Co Ltd | Heat supplying system for district |
| CN102997361A (en) * | 2012-12-28 | 2013-03-27 | 上海交通大学 | Subway station ground source heat pump air conditioning system |
| CN104913544A (en) * | 2015-05-31 | 2015-09-16 | 上海燃气工程设计研究有限公司 | Gas terminal station energy utilization method based on ground source heat pump system |
| CN208871777U (en) * | 2018-09-25 | 2019-05-17 | 中国铁路设计集团有限公司 | A kind of subway station recovery type heat ventilation and air conditioning system |
| CN211739334U (en) * | 2019-12-19 | 2020-10-23 | 依米康科技集团股份有限公司 | Heat recovery type VRV air conditioning system suitable for room for subway station |
-
2021
- 2021-03-24 CN CN202110314865.5A patent/CN113237157A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000074391A (en) * | 1998-06-18 | 2000-03-14 | Aisin Seiki Co Ltd | Heat supplying system for district |
| CN102997361A (en) * | 2012-12-28 | 2013-03-27 | 上海交通大学 | Subway station ground source heat pump air conditioning system |
| CN104913544A (en) * | 2015-05-31 | 2015-09-16 | 上海燃气工程设计研究有限公司 | Gas terminal station energy utilization method based on ground source heat pump system |
| CN208871777U (en) * | 2018-09-25 | 2019-05-17 | 中国铁路设计集团有限公司 | A kind of subway station recovery type heat ventilation and air conditioning system |
| CN211739334U (en) * | 2019-12-19 | 2020-10-23 | 依米康科技集团股份有限公司 | Heat recovery type VRV air conditioning system suitable for room for subway station |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413417A (en) * | 2021-12-22 | 2022-04-29 | 珠海格力电器股份有限公司 | Anti-freezing control method and device, storage medium and electronic equipment |
| CN114413417B (en) * | 2021-12-22 | 2023-02-17 | 珠海格力电器股份有限公司 | Anti-freezing control method and device, storage medium and electronic equipment |
| CN115004990A (en) * | 2022-08-09 | 2022-09-06 | 山东鑫光节能科技有限公司 | Cherry planting temperature monitoring joint control system |
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