CN220417448U - Doublestage heat pump heating system - Google Patents
Doublestage heat pump heating system Download PDFInfo
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- CN220417448U CN220417448U CN202321814668.0U CN202321814668U CN220417448U CN 220417448 U CN220417448 U CN 220417448U CN 202321814668 U CN202321814668 U CN 202321814668U CN 220417448 U CN220417448 U CN 220417448U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 224
- 239000007789 gas Substances 0.000 description 12
- 230000001932 seasonal effect Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The utility model discloses a two-stage heat pump heating system, belongs to the technical field of heating, and can solve the problems of poor heating performance and low stability of the existing heating mode. The system comprises: the air source heat pump module is used for preparing warm water with a first temperature; the water source heat pump module is connected with the air source heat pump module and is used for preparing second-temperature hot water by taking the first-temperature warm water as a heat source; the boiler module is connected with the water source heat pump module and is used for heating the second-temperature hot water into third-temperature hot water and providing the hot water for a heat user; wherein the second temperature is greater than the first temperature and less than the third temperature. The utility model is used for preparing heating hot water.
Description
Technical Field
The utility model relates to a two-stage heat pump heating system, and belongs to the technical field of heating.
Background
In recent years, under the guidance of policies such as clean heating in northern areas and national 'double carbon', heating improvement by coal to electricity, coal to gas, cogeneration and the like is rapidly promoted. In order to ensure the existing heat supply area of urban areas, the heat supply proportion of renewable energy sources and clean energy sources is gradually increased, and the heat pump technology is applied to the northern building heat supply field in a certain scale.
The air source heat pump extracts heat energy from air, and finally, the heat energy is conveyed to heating equipment, so that the working efficiency is high, the equipment arrangement is flexible, and the heat pump is widely utilized in the building heating fields of northern living, business office and the like. However, when the air source heat pump encounters a low-temperature environment, the air source heat pump cannot reach the heating water temperature required by the indoor heating equipment, the heating capacity is reduced, the energy utilization efficiency is low, and the system is unstable.
The water source heat pump is a water source such as groundwater and river on the shallow layer of the earth surface, realizes the transfer of low-level heat energy to high-level heat energy, has higher operation efficiency, low cost and low power consumption, and does not have the problems of defrosting in winter and the like of the air source heat pump, thus being rapidly developed. But is limited by water resource conditions, and can not be used in large scale in northern areas. Meanwhile, when the temperature of the water source side is too low, the heating efficiency of the water source heat pump is reduced, and the energy consumption of the system is increased.
In conclusion, the air source heat pump is limited by the low-temperature environment in northern areas, and has low efficiency; the water source heat pump is also applied less, limited by resource conditions. Meanwhile, the temperature provided by the heat pump and the municipal central heat supply is not matched, and the heat pump and the municipal central heat supply network cannot be directly connected.
Disclosure of Invention
The utility model provides a two-stage heat pump heating system which can solve the problems of poor heating performance and low stability of the existing heating mode.
The utility model provides a two-stage heat pump heating system, which comprises:
the air source heat pump module is used for preparing warm water with a first temperature;
the water source heat pump module is connected with the air source heat pump module and is used for preparing second-temperature hot water by taking the first-temperature hot water as a heat source;
the boiler module is connected with the water source heat pump module and is used for heating the second-temperature hot water into third-temperature hot water and providing the hot water for a heat user;
wherein the second temperature is greater than the first temperature and less than the third temperature.
Optionally, the air source heat pump module is further configured to receive return water from the water source heat pump module, and heat the return water to warm water with a first temperature.
Optionally, the air source heat pump module comprises at least one air source heat pump, and the air source heat pump has a first water outlet and a first water inlet; the water source heat pump module comprises at least one water source heat pump, and the water source heat pump is provided with a second water inlet and a second water outlet;
the first water outlet is communicated with the second water inlet through a first connecting water pipe, and the second water outlet is communicated with the first water inlet through a second connecting water pipe.
Optionally, the water source heat pump module is further used for receiving backwater of a heat user and heating the backwater to the second temperature hot water.
Optionally, the water source heat pump module comprises at least one water source heat pump, and the water source heat pump is provided with a third water inlet and a third water outlet; the boiler module is provided with a fourth water inlet and a fourth water outlet;
the third water outlet is communicated with the fourth water inlet through a third connecting water pipe, and the third water inlet is used for receiving backwater of a heat user; and the fourth water outlet is used for providing heating hot water for a hot user.
Optionally, the air source heat pump module further comprises a first circulating water pump; the first circulating water pump is arranged on the first connecting water pipe.
Optionally, the number of the first circulating water pumps is 3, and 3 first circulating water pumps are arranged on the first connecting water pipe in parallel.
Optionally, the water source heat pump module further comprises a second circulating water pump, and the second circulating water pump is arranged on a connecting pipeline between the third water inlet and the heat user water return port.
Optionally, the number of the second circulating water pumps is 3, and 3 second circulating water pumps are arranged on the connecting pipeline in parallel.
The utility model has the beneficial effects that:
(1) According to the two-stage heat pump heating system provided by the utility model, hot water produced by the air source heat pump is used as a low-temperature heat source of the water source heat pump, when the water inlet and outlet temperature of the air source heat pump is 22/30 ℃, the efficiency of the air source heat pump is higher, and the efficiency of the air source heat pump can be improved by more than 40% under a rated working condition. Compared with the conventional water source heat pump, the low-temperature heat source adopts hot water at 22/30 ℃ as a high-quality heat source, at the temperature, the water source heat pump improves the heat supply backwater by 15 ℃ (45 ℃ -60 ℃), and the running efficiency and the stability are higher.
(2) According to the two-stage heat pump heating system provided by the utility model, the air source heat pump and water source heat pump coupling system is adopted to reduce the investment cost of heating, so that the two-stage heat pump heating system has higher economic and energy-saving values; in terms of occupied space, the water source heat pump can be arranged in a machine room, and the air source heat pump can be placed on the roof of the machine room no matter the water source heat pump is arranged in an underground machine room or on the ground, so that the ground can be fully utilized.
(3) According to the two-stage heat pump heating system provided by the utility model, the air source heat pump, the water source heat pump and the gas boiler are coupled to form the composite heating system, and the system has a higher seasonal heating performance coefficient in a low-temperature environment, so that a higher heating requirement of a heat user is met. Meanwhile, the system can be suitable for urban central heating in northern areas, improves the utilization rate of renewable energy sources and reduces fossil energy consumption.
Drawings
FIG. 1 is a schematic diagram of a two-stage heat pump heating system according to an embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a two-stage heat pump heating system according to an embodiment of the present utility model.
List of parts and reference numerals:
1. an air source heat pump; 2. a water source heat pump; 3. a boiler module; 4. a hot user; 5. a first circulating water pump; 6. and a second circulating water pump.
Detailed Description
The present utility model is described in detail below with reference to examples, but the present utility model is not limited to these examples.
Conventional heat pump heating technologies typically have the following problems: (1) The single-stage air source heat pump cannot provide large temperature difference requirements, and when the inlet and outlet water temperature is 45/50 ℃, the seasonal efficiency in a low-temperature environment is lower; (2) The two-stage air source heat pump cannot provide high-temperature water, and the efficiency of the second-stage air source heat pump is rapidly reduced; (3) The ground source heat pump system has risks of well digging and recharging, has high investment, and can gradually lower the temperature of an underground rock-soil body due to long-term heat extraction from the underground, thereby influencing the efficiency of a heat pump unit; (4) The heat supply quantity of a single air source heat pump is small, and the occupied area is large; (5) The heating efficiency of the air source heat pump and the water source heat pump is higher than that of the gas boiler, but when the gas boiler is used on a large scale, outdoor air forms a 'cold island' locally, and the operation efficiency of the gas boiler can be influenced.
In order to solve the above problems, an embodiment of the present utility model provides a two-stage heat pump heating system, as shown in fig. 1 and 2, including:
the air source heat pump module is used for preparing warm water with a first temperature.
The water source heat pump module is connected with the air source heat pump module and is used for preparing second-temperature hot water by taking the first-temperature warm water as a heat source.
The boiler module 3 is connected with the water source heat pump module and is used for heating the second-temperature hot water into third-temperature hot water and providing the hot water for a heat user 4.
Wherein the second temperature is greater than the first temperature and less than the third temperature.
In the embodiment of the utility model, the air source heat pump module is also used for receiving the backwater of the water source heat pump module and heating the backwater to the first temperature warm water.
The water source heat pump module is also used for receiving backwater of the heat user 4 and heating the backwater to the second temperature hot water.
The specific values of the first temperature, the second temperature and the third temperature are not limited in the embodiment of the utility model, and can be set by a person skilled in the art according to actual situations.
For example, referring to fig. 1, the air source heat pump module is used as a low-temperature heat source of the water source heat pump module, the water inlet and outlet temperatures of the air source heat pump module can be 22/30 ℃, heat exchange is performed with the return water of the heat supply network entering the water source heat pump module, the water inlet and outlet temperatures of the water source heat pump module are 45/60 ℃, and after secondary lifting, the water enters the boiler module 3 to be heated to 90 ℃ and the hot water is supplied to the heat supply network.
The air source heat pump module comprises at least one air source heat pump 1, wherein the air source heat pump 1 is provided with a first water outlet and a first water inlet; the water source heat pump module comprises at least one water source heat pump 2, and the water source heat pump 2 is provided with a second water inlet and a second water outlet; the first water outlet is communicated with the second water inlet through a first connecting water pipe, and the second water outlet is communicated with the first water inlet through a second connecting water pipe.
The specific number of the air source heat pump 1 and the water source heat pump 2 is not limited in the embodiment of the utility model, and can be set by a person skilled in the art according to actual situations.
Further, the air source heat pump module further comprises a first circulating water pump 5; the first circulating water pump 5 is provided on the first connecting water pipe.
The specific number of the first circulating water pumps 5 is not limited in the embodiment of the present utility model, and those skilled in the art can set the number according to actual situations. In practical application, the number of the first circulating water pumps 5 may be 3, and the 3 first circulating water pumps 5 are arranged on the first connecting water pipe in parallel. In normal operation, 2 first circulating water pumps 5 are generally used, and the other one is used as a standby water pump.
The water source heat pump module comprises at least one water source heat pump 2, and the water source heat pump 2 is provided with a third water inlet and a third water outlet; the boiler module 3 has a fourth water inlet and a fourth water outlet; the third water outlet is communicated with the fourth water inlet through a third connecting water pipe, and the third water inlet is used for receiving backwater of the heat user 4; the fourth water outlet is used for providing heating hot water to the heat consumer 4. Wherein the boiler module 3 may comprise a gas boiler.
Further, the water source heat pump module further comprises a second circulating water pump 6, and the second circulating water pump 6 is arranged on a connecting pipeline between the third water inlet and the water return port of the heat user 4.
The specific number of the second circulating water pumps 6 is not limited in the embodiment of the present utility model, and those skilled in the art can set the number according to actual situations. In practical application, the number of the second circulating water pumps 6 can be 3, and the 3 second circulating water pumps 6 are arranged on the connecting pipeline in parallel. In normal operation, 2 second circulating water pumps 6 are generally used, and the other one is used as a standby water pump.
Referring to fig. 1, in winter, an air source heat pump 1 absorbs heat in outdoor air, heats backwater at 22 ℃ at the side of a water source heat pump 2 to prepare hot water at 30 ℃, provides low-level energy for the water source heat pump 2, realizes transfer of low-level heat energy to high-level heat energy by inputting a small amount of high-level electric energy through the water source heat pump 2, heats backwater at 45 ℃ of a heat supply pipe network to 60 ℃ and then sends the backwater to a gas boiler, finally, the gas boiler provides hot water at 90 ℃ for heating to a heat user 4, and backwater at the user side returns to the water source heat pump 2 for secondary lifting, so that the coupling system greatly improves heating reliability in low-temperature environment in winter and has higher seasonal heat supply performance coefficient.
The specific working principle of the system is shown with reference to fig. 2, when heating in winter, the air source heat pump 1 is started, the first circulating water pump 5 at the side of the air source heat pump 1 operates, heat in the outdoor air is absorbed by the outdoor air side heat exchanger (evaporator) and is transmitted to the water side heat exchanger (condenser), return water at 22 ℃ is heated to prepare hot water at 30 ℃, and low-level energy is provided for the water source heat pump 2.
Meanwhile, the water source heat pump 2 is operated, the second circulating water pump 6 at the side of the water source heat pump 2 is turned on, the transfer of low-level heat energy to high-level heat energy is realized through the input of a small amount of high-level electric energy based on the heat pump principle, the return water at 45 ℃ of the heat user 4 is heated to 60 ℃ and then is sent to the gas boiler, and the gas boiler heats hot water to 90 ℃ and supplies the hot water to the heat user 4.
Taking a scale of 90MW heating heat load as an example, wherein the air source heat pump 1 and the water source heat pump 2 bear 20MW heat load, and the gas boiler bears 70MW heat load. 15 air source heat pumps 1, 1.1MW of single heat supply, 6 water source heat pumps 2, 3.6MW of single heat supply, 1 gas boiler and 70MW of single heat supply are selected and matched in the system. Then 518.2 ten thousand Nm of natural gas consumption is reduced in one heating season 3 The CO2 emission is reduced by 8650 tons, and the efficiency is improved by 22.2 percent.
According to the utility model, the air source heat pump 1, the water source heat pump 2 and the gas-fired boiler are coupled, under a low-temperature environment, the air source heat pump 1 is firstly utilized to provide a low-level heat source for the water source heat pump 2, and then the water source heat pump 2 is used for carrying out secondary lifting and then is sent to the gas-fired boiler, so that the heating requirement of a heat user 4 is met, and the seasonal heat supply performance coefficient and economic benefit of the system are improved. The system can be suitable for urban central heating in northern areas, improves the utilization rate of renewable energy sources, and reduces fossil energy consumption.
The foregoing description is only a few examples of the present application and is not intended to limit the present application in any way, and although the present application is disclosed in the preferred examples, it is not intended to limit the present application, and any person skilled in the art may make some changes or modifications to the disclosed technology without departing from the scope of the technical solution of the present application, and the technical solution is equivalent to the equivalent embodiments.
Claims (9)
1. A two-stage heat pump heating system, the system comprising:
the air source heat pump module is used for preparing warm water with a first temperature;
the water source heat pump module is connected with the air source heat pump module and is used for preparing second-temperature hot water by taking the first-temperature hot water as a heat source;
the boiler module is connected with the water source heat pump module and is used for heating the second-temperature hot water into third-temperature hot water and providing the hot water for a heat user;
wherein the second temperature is greater than the first temperature and less than the third temperature.
2. The system of claim 1, wherein the air source heat pump module is further configured to receive return water from the water source heat pump module and to warm the return water to the first temperature warm water.
3. The system of claim 2, wherein the air source heat pump module comprises at least one air source heat pump having a first water outlet and a first water inlet; the water source heat pump module comprises at least one water source heat pump, and the water source heat pump is provided with a second water inlet and a second water outlet;
the first water outlet is communicated with the second water inlet through a first connecting water pipe, and the second water outlet is communicated with the first water inlet through a second connecting water pipe.
4. A system according to any one of claims 1 to 3, wherein the water source heat pump module is further adapted to receive return water from a heat consumer and to heat the return water to a second temperature hot water.
5. The system of claim 4, wherein the water source heat pump module comprises at least one water source heat pump having a third water inlet and a third water outlet; the boiler module is provided with a fourth water inlet and a fourth water outlet;
the third water outlet is communicated with the fourth water inlet through a third connecting water pipe, and the third water inlet is used for receiving backwater of a heat user; and the fourth water outlet is used for providing heating hot water for a hot user.
6. The system of claim 3, wherein the air source heat pump module further comprises a first circulating water pump; the first circulating water pump is arranged on the first connecting water pipe.
7. The system of claim 6, wherein the first circulating water pumps are 3, and 3 first circulating water pumps are arranged in parallel on the first connecting water pipe.
8. The system of claim 5, wherein the water source heat pump module further comprises a second circulating water pump disposed on a connecting conduit between the third water inlet and a heat user return.
9. The system of claim 8, wherein the number of second circulating water pumps is 3, and 3 second circulating water pumps are arranged in parallel on the connecting pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321814668.0U CN220417448U (en) | 2023-07-11 | 2023-07-11 | Doublestage heat pump heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321814668.0U CN220417448U (en) | 2023-07-11 | 2023-07-11 | Doublestage heat pump heating system |
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| Publication Number | Publication Date |
|---|---|
| CN220417448U true CN220417448U (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321814668.0U Active CN220417448U (en) | 2023-07-11 | 2023-07-11 | Doublestage heat pump heating system |
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| Country | Link |
|---|---|
| CN (1) | CN220417448U (en) |
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2023
- 2023-07-11 CN CN202321814668.0U patent/CN220417448U/en active Active
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