CN220601597U - Heat pump heating system - Google Patents
Heat pump heating system Download PDFInfo
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- CN220601597U CN220601597U CN202322000941.2U CN202322000941U CN220601597U CN 220601597 U CN220601597 U CN 220601597U CN 202322000941 U CN202322000941 U CN 202322000941U CN 220601597 U CN220601597 U CN 220601597U
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 114
- 230000000694 effects Effects 0.000 abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 12
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 230000009467 reduction Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Abstract
The utility model discloses a heat pump heating system, which comprises a heat source plant and a heat user, wherein a primary pipe network is arranged between the heat source plant and the heat user and is connected with a water source heat pump unit, the water source heat pump unit is connected with the heat source plant through a plurality of air source heat pump units which are sequentially connected, and the temperature of backwater returned to the heat source plant is gradually increased through the plurality of air source heat pump units. According to the heat pump heating system provided by the utility model, the plurality of air source heat pump units are sequentially arranged along the water return pipeline of the primary heat supply pipe network, so that equipment can be distributed and arranged, heat is intensively supplied, the problem of insufficient space of urban cells is effectively solved, the cold island effect is eliminated, the return water is gradually warmed up through the arrangement of the air source heat pump units along the pipeline, the heat transfer temperature difference is reduced, the heat pump energy efficiency is improved, the heat energy can be directly extracted from the air after the return water temperature of the water source heat pump units is reduced, the heat purchasing quantity from a heat source plant is reduced, and the reliability of the heating system is greatly improved.
Description
Technical Field
The utility model belongs to the technical field of heating, and particularly relates to a heat pump heating system.
Background
The main heat source of the existing central heating system is a thermal power plant or a distributed coal-fired and gas-fired boiler, and the carbon emission intensity is high. Along with the proposal of the double carbon target, the reduction of carbon emission in the heating industry is imperative. The heat pump can extract heat energy from air, only consumes a small amount of electric energy, can obtain larger heat supply, is a key technology for supporting energy conservation and carbon reduction, and can lower and lower carbon emission when the electric heating pump is used for heating along with large-scale access of new energy power generation.
The existing air source heat pump is mainly characterized in that a heat pump outdoor unit is arranged in an area which is separately arranged near a community, when the heating area is large, a large outdoor occupied area is needed, and for the existing old community or the urban community, the outdoor unit is difficult to be additionally arranged in space; in addition, the concentrated arrangement of the heat pump outdoor units causes a cold island effect to deteriorate the heat pump performance. When the heat pumps are arranged in a concentrated mode, when the water supply temperature is 45 ℃, the condensation temperature of the air source heat pump is required to be higher than 45 ℃, and when the water inlet temperature is lower, the heat transfer temperature difference is increased, so that the heat supply economy is reduced.
Therefore, there is a need to design a heat pump heating system to solve the problems that the outdoor unit occupies a larger outdoor area, which causes a cold island effect, deteriorates the performance of the heat pump, increases the heat transfer temperature difference when the inlet water temperature is low, and reduces the heating economy.
Disclosure of Invention
In order to solve the technical problems that the outdoor unit needs to occupy a larger outdoor area and can cause a cold island effect, so that the performance of the heat pump is deteriorated, the heat transfer temperature difference is increased when the water inlet temperature is lower, and the heat supply economy is reduced, the heat pump heating system is provided to solve the problems.
In order to achieve the above object, the specific technical scheme of the heat pump heating system of the present utility model is as follows:
the heat pump heating system comprises a heat source plant and a heat user, wherein a primary pipe network is arranged between the heat source plant and the heat user, the primary pipe network is connected with a water source heat pump unit, the water source heat pump unit is connected with the heat source plant through a plurality of air source heat pump units which are sequentially connected, and the temperature of backwater returned to the heat source plant is gradually increased through the plurality of air source heat pump units.
Further, the plurality of air source heat pump units comprise a first air source heat pump unit, a second air source heat pump unit and a third air source heat pump unit, the first air source heat pump unit, the second air source heat pump unit and the third air source heat pump unit are sequentially connected between the water source heat pump unit and the heat source plant, and the return water temperature flowing back to the heat source plant is gradually increased through the first air source heat pump unit, the second air source heat pump unit and the third air source heat pump unit.
Further, the system also comprises a secondary pipe network, wherein the secondary pipe network is arranged between the primary pipe network and the heat user, one end of the secondary pipe network is connected with the heat user, and the other end of the secondary pipe network is connected with a plurality of air source heat pump units through a water source heat pump unit.
Further, the water source heat pump unit comprises an evaporator, and water in the secondary pipe network is cooled by the evaporator and then sequentially flows back to the first air source heat pump unit, the second air source heat pump unit and the third air source heat pump unit for gradual heating.
Further, the water source heat pump unit also comprises a condenser, and the water in the secondary pipe network is connected with a heat user after being heated by the condenser.
Further, the water heater also comprises a mixing water tank, wherein the mixing water tank is arranged between the secondary pipe network and a heat user, and water heated by the condenser enters the mixing water tank.
Further, the primary pipe network comprises a first heat exchanger, a first valve and a first water pump, the first heat exchanger is connected with the heat source plant, and the first valve and the first water pump are sequentially arranged between the first heat exchanger and the secondary pipe network.
Further, the secondary pipe network includes second heat exchanger, second valve and second water pump, and the second heat exchanger is connected with first water pump, has set gradually second valve and second water pump between second heat exchanger and the heat user, and the mixed water tank sets up between second valve and second water pump.
Further, the water in the second heat exchanger is cooled by the evaporator and then sequentially heated step by the first air source heat pump unit, the second air source heat pump unit and the third air source heat pump unit, and then flows back into the first heat exchanger.
Further, a third valve is included, the third valve being disposed between the heat source plant and the first heat exchanger.
The heat pump heating system of the utility model has the following advantages:
through arranging a plurality of air source heat pump units along a heat supply primary pipe network water return pipeline in sequence, equipment can be distributed and arranged, heat is intensively supplied, the problem of urban district space deficiency is effectively solved, the cold island effect is eliminated, the water return step is heated up through heat pump along the pipeline arrangement, the heat transfer temperature difference is reduced, the heat pump energy efficiency is improved, and the heating economy is improved. The heat energy can be directly extracted from the air after the water source heat pump unit reduces the return water temperature, the heat supply capacity can be improved on the premise of not increasing the pipeline investment, a plurality of air source heat pump units are sequentially arranged on the return water pipeline, the heat purchase amount from a heat source plant can be reduced, the heat supply carbon emission is reduced, under extremely cold weather, the return water is still connected with the heat source plant, when the air source heat pump can be influenced by extremely cold weather, the water supply temperature still reaches the target temperature through the adjustment of the heat source plant, and the reliability of a heat supply system is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a heat pump heating system according to the present utility model;
FIG. 2 is a diagram of a heating temperature rise curve of heat pump heating backwater in the prior art;
fig. 3 is a heating temperature rise curve of the heat pump heating backwater.
The figure indicates:
1. a heat source plant; 2. a third valve; 3. a first heat exchanger; 4. a first valve; 5. a first water pump; 6. a second heat exchanger; 7. a second valve; 8. a mixing water tank; 9. a second water pump; 10. a hot user; 11. a third air source heat pump unit; 12. the second air source heat pump unit; 13. a first air source heat pump unit; 14. a water source heat pump unit; 141. a condenser; 142. an evaporator; 143. and a fourth valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
Those skilled in the art will appreciate that while some embodiments herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The heat pump heating system of the present utility model is described below with reference to fig. 1 to 3.
The existing central heating system pays attention to the fact that the heat source is a thermal power plant or a distributed coal-fired and gas-fired boiler, and the carbon emission intensity is high. Along with the proposal of the double carbon target, the reduction of carbon emission in the heating industry is imperative. The heat pump can extract heat energy from air, only consumes a small amount of electric energy, can obtain larger heat supply, is a key technology for supporting energy conservation and carbon reduction, and can lower and lower carbon emission when the electric heating pump is used for heating along with large-scale access of new energy power generation. The existing air source heat pump is mainly characterized in that a heat pump outdoor unit is arranged in an area which is separately arranged near a community, when the heating area is large, a large outdoor occupied area is needed, and for the existing old community or the urban community, the outdoor unit is difficult to be additionally arranged in space; in addition, the concentrated arrangement of the heat pump outdoor units causes a cold island effect to deteriorate the heat pump performance. When the heat pumps are arranged in a concentrated mode, when the water supply temperature is 45 ℃, the condensation temperature of the air source heat pump is required to be higher than 45 ℃, and when the water inlet temperature is lower, the heat transfer temperature difference is increased, so that the heat supply economy is reduced.
Therefore, the utility model provides the heat pump heating system, which can realize the scattered arrangement of equipment and the centralized supply of heat, effectively solve the problem of insufficient space of urban cells and eliminate the cold island effect, and gradually raise the temperature of backwater by arranging the air source heat pump units along pipelines, so as to reduce the heat transfer temperature difference, improve the energy efficiency of the air source heat pump units and improve the heating economy.
As shown in fig. 1, the heat pump heating system in the utility model comprises a heat source plant 1 and a heat user 10, a primary pipe network is arranged between the heat source plant 1 and the heat user 10, the primary pipe network is connected with a water source heat pump unit 14, the water source heat pump unit 14 is connected with the heat source plant 1 through a plurality of air source heat pump units in turn, and the return water temperature returned to the heat source plant 1 is increased step by step through the plurality of air source heat pump units. Specifically, the plurality of air source heat pump units in this embodiment include a first air source heat pump unit 13, a second air source heat pump unit 12, and a third air source heat pump unit 11, and the first air source heat pump unit 13, the second air source heat pump unit 12, and the third air source heat pump unit 11 are sequentially connected between the water source heat pump unit 14 and the heat source plant 1, and the return water temperature that flows back to the heat source plant 1 is gradually increased by the first air source heat pump unit 13, the second air source heat pump unit 12, and the third air source heat pump unit 11. In other embodiments, 4, 5 or other numbers of air source heat pump units can be set according to actual conditions, so that the temperature of the backwater is better increased step by step.
By arranging a primary pipe network between the heat source plant 1 and the heat consumer 10, the primary pipe network is connected with a water source heat pump unit 14, the water source heat pump unit 14 is connected with the heat source plant 1 by sequentially connecting a first air source heat pump unit 13, a second air source heat pump unit 12 and a third air source heat pump unit 11, and the return water temperature is gradually increased by the first air source heat pump unit 13, the second air source heat pump unit 12 and the third air source heat pump unit 11. By arranging the first air source heat pump unit 13, the second air source heat pump unit 12 and the third air source heat pump unit 11 along the water return pipeline of the primary heat supply pipe network, the heat energy can be directly extracted from the air after the water source heat pump unit 14 reduces the water return temperature, and the heat supply capacity can be improved on the premise of not increasing the pipeline investment. And the first air source heat pump unit 13, the second air source heat pump unit 12 and the third air source heat pump unit 11 are arranged on the water return pipeline, so that the heat purchasing amount from the heat source plant 1 can be reduced, the heat supply carbon emission is reduced, and in extremely cold weather, as the water return is still connected with the heat source plant 1, when the air source heat pump unit can be influenced by extremely cold weather, the water supply temperature can still reach the target temperature through the adjustment of the heat source plant 1, and the reliability of the heat supply system is greatly improved.
Further, as shown in fig. 1, the heat pump heating system of the present utility model further includes a secondary pipe network, the secondary pipe network is disposed between the primary pipe network and the heat consumer 10, one end of the secondary pipe network is connected to the heat consumer 10, and the other end of the secondary pipe network is connected to a plurality of air source heat pump units through a water source heat pump unit 14. The water source heat pump unit 14 comprises an evaporator 142, and water in a primary pipe network is sequentially connected with the first air source heat pump unit 13, the second air source heat pump unit 12 and the third air source heat pump unit 11 after being cooled by the evaporator 142.
The temperature of the backwater entering the first air source heat pump unit 13 is lower after the backwater is cooled by the evaporator 142, the energy efficiency of the first air source heat pump unit 13 is high at low temperature, the evaporator 142 is beneficial to improving the energy efficiency of the first air source heat pump unit 13 after the temperature of the backwater is reduced, the temperature of the backwater can be increased after the backwater passes through the first air source heat pump unit 13, and the backwater enters the second air source heat pump unit 12, and the backwater is beneficial to improving the energy efficiency of the second air source heat pump unit 12 because the temperature of the backwater is not very high, the backwater temperature can be increased again after the backwater passes through the second air source heat pump unit 12, and the backwater enters the third air source heat pump unit 11 because the temperature of the backwater is very high, so the energy efficiency of the third air source heat pump unit 11 can be improved. The temperature of the backwater entering the first air source heat pump unit 13 is higher than that of the backwater entering the second air source heat pump unit 12, and the temperature of the backwater entering the second air source heat pump unit 12 is higher than that of the backwater entering the third air source heat pump unit 11. The return water temperature cooled by the evaporator 142 is gradually increased by the first air source heat pump unit 13, the second air source heat pump unit 12 and the third air source heat pump unit 11 so as to reach the required return water temperature.
Further, as shown in fig. 1, the primary pipe network includes a first heat exchanger 3, a first valve 4 and a first water pump 5, the first heat exchanger 3 is connected with the heat source plant 1, and the first valve 4 and the first water pump 5 are sequentially arranged between the first heat exchanger 3 and the secondary pipe network. The secondary pipe network comprises a second heat exchanger 6, a second valve 7 and a second water pump 9, wherein the second heat exchanger 6 is connected with the first water pump 5, and the second valve 7 and the second water pump 9 are sequentially arranged between the second heat exchanger 6 and a heat user 10. In this embodiment, the water in the second heat exchanger 6 is cooled by the evaporator 142, and then sequentially passes through the first air source heat pump unit 13, the second air source heat pump unit 12 and the third air source heat pump unit 11, and then flows back into the first heat exchanger 3.
Further, as shown in fig. 1, the water source heat pump unit 14 further includes a condenser 141, and the water portion in the secondary pipe network is connected to the heat consumer 10 after being heated by the condenser 141. The heat pump heating system of the present utility model further includes a mixing tank 8, the mixing tank 8 being disposed between the secondary pipe network and the heat consumer 10, and water heated by the condenser 141 being introduced into the mixing tank 8. In this embodiment, the mixing tank 8 is arranged between the second valve 7 and the second water pump 9. The mixing water tank 8 has two functions, namely, the water discharged by the water source heat pump 14 and the water supply heated by the second heat exchanger 6 can be mixed, and the influence of the fluctuation of the water discharge temperature of the water source heat pump 14 on the water supply temperature of a user can be effectively reduced; in addition, the mixed water tank 8 can also be used as an energy storage/water storage container, so that the flexibility of the whole heating system can be greatly improved.
Further, as shown in fig. 1, the heat pump heating system of the present utility model further includes a third valve 2, and the third valve 2 is disposed between the heat source plant 1 and the first heat exchanger 3 for controlling the flow rate of water. The heat pump heating system of the present utility model further includes a fourth valve 143, and the fourth valve 143 is disposed between the evaporator 142 and the condenser 141 for controlling the flow rate of water.
By arranging the first air source heat pump unit 13, the second air source heat pump unit 12 and the third air source heat pump unit 11 along the water return pipeline of the primary heat supply pipe network, the water sequentially enters different heat pump units along the water return pipeline of the primary pipe network, and the water temperature can be gradually increased. The return water temperature close to the second heat exchanger 6 is lower, the condensation temperatures of the first air source heat pump unit 13, the second air source heat pump unit 12 and the third air source heat pump unit 11 run at lower temperature, the unit energy efficiency is higher, the condensation temperature of the along-path heat pump unit can be slowly improved along with the rise of the return water temperature, the heat exchange temperature difference can be effectively reduced, and the energy efficiency is maximized.
For a conventional heat pump heating unit, as shown in fig. 2, the return water is heated to a specified temperature, the temperature rise DT, and the condenser 141 temperature Tc are always high. In the temperature rise curve in this embodiment, as can be seen from fig. 3, the first air source heat pump unit 13, the second air source heat pump unit 12 and the third air source heat pump unit 11 are arranged along the way, and in the area with lower return water temperature, the condensation temperature can be reduced to Tc1, so that the energy efficiency of the air source heat pump units is improved, as the return water temperature is increased, the return water temperature can be ensured to reach the designated temperature as long as the condensation temperature of the last air source heat pump unit reaches Tc, and the overall condensation temperature of the air source heat pump units is reduced, so that the overall energy efficiency can be improved.
It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. The heat pump heating system is characterized by comprising a heat source plant and a heat user, wherein a primary pipe network is arranged between the heat source plant and the heat user and is connected with a water source heat pump unit, the water source heat pump unit is connected with the heat source plant through a plurality of air source heat pump units which are sequentially connected, and the return water temperature flowing back to the heat source plant is increased step by step through the plurality of air source heat pump units.
2. The heat pump heating system of claim 1, wherein the plurality of air source heat pump units includes a first air source heat pump unit, a second air source heat pump unit, and a third air source heat pump unit, the first air source heat pump unit, the second air source heat pump unit, and the third air source heat pump unit being sequentially connected between the water source heat pump unit and the heat source plant, the return water temperature returned to the heat source plant being increased step by the first air source heat pump unit, the second air source heat pump unit, and the third air source heat pump unit.
3. The heat pump heating system of claim 1, further comprising a secondary pipe network, the secondary pipe network being disposed between the primary pipe network and the heat consumer, one end of the secondary pipe network being connected to the heat consumer, the other end of the secondary pipe network being connected to the plurality of air source heat pump units via a water source heat pump unit.
4. A heat pump heating system according to claim 3, wherein the water source heat pump unit comprises an evaporator, and water in the secondary pipe network is cooled by the evaporator and then sequentially flows back to the first air source heat pump unit, the second air source heat pump unit and the third air source heat pump unit for gradual temperature rise.
5. A heat pump heating system according to claim 3, wherein the water source heat pump unit further comprises a condenser, and the water in the secondary pipe network is heated by the condenser and then connected to a heat consumer.
6. A heat pump heating system according to claim 3, further comprising a mixing tank disposed between the secondary pipe network and the heat consumer, the condenser heated water entering the mixing tank.
7. The heat pump heating system of claim 2, wherein the primary pipe network comprises a first heat exchanger, a first valve and a first water pump, the first heat exchanger is connected with the heat source plant, and the first valve and the first water pump are sequentially arranged between the first heat exchanger and the secondary pipe network.
8. The heat pump heating system of claim 7, wherein the secondary pipe network comprises a second heat exchanger, a second valve and a second water pump, the second heat exchanger is connected with the first water pump, the second valve and the second water pump are sequentially arranged between the second heat exchanger and a heat user, and the mixing water tank is arranged between the second valve and the second water pump.
9. The heat pump heating system of claim 8, wherein the water in the second heat exchanger is cooled by the evaporator and then sequentially heated by the first air source heat pump unit, the second air source heat pump unit and the third air source heat pump unit step by step and then flows back into the first heat exchanger.
10. The heat pump heating system of claim 7, further comprising a third valve disposed between the heat source plant and the first heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322000941.2U CN220601597U (en) | 2023-07-28 | 2023-07-28 | Heat pump heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322000941.2U CN220601597U (en) | 2023-07-28 | 2023-07-28 | Heat pump heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220601597U true CN220601597U (en) | 2024-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322000941.2U Active CN220601597U (en) | 2023-07-28 | 2023-07-28 | Heat pump heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220601597U (en) |
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2023
- 2023-07-28 CN CN202322000941.2U patent/CN220601597U/en active Active
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