CN217604208U - Containing CO 2 Heating system of compression heat pump - Google Patents
Containing CO 2 Heating system of compression heat pump Download PDFInfo
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- CN217604208U CN217604208U CN202123272708.7U CN202123272708U CN217604208U CN 217604208 U CN217604208 U CN 217604208U CN 202123272708 U CN202123272708 U CN 202123272708U CN 217604208 U CN217604208 U CN 217604208U
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Abstract
The utility model provides a CO-containing water heater 2 A heating system for a compression heat pump comprising: CO 2 2 Compression heat pump, absorption heat pump and a plurality of pipeline. Wherein, CO 2 The compression heat pump comprises a compressor, a multi-stage cooler, an expansion valve and an evaporator, wherein the multi-stage cooler comprises a first cooler, a second cooler and a third coolerA machine; the absorption heat pump comprises a generator, an absorber, a condenser and an evaporator. The utility model discloses a multistage formula cooler reaches the effect of cooling down step by step, has solved CO 2 The problem that gas is too high in cooler outlet temperature simultaneously, through multistage formula cooler cooperation absorption heat pump, has realized the make full use of to the heat of high-temperature gas release, not only can drive the absorption heat pump through this heat, can also be to the water secondary heating of heating return circuit for the heating water further rises at the temperature of exit end, guarantees the heat supply effect.
Description
Technical Field
The utility model relates to a heat supply technical field especially relates to a contain CO 2 Provided is a heating system of a compression heat pump.
Background
At present, heat supply in China mainly depends on fossil energy, such as coal-fired boilers, gas-fired boilers and combined heat and power generation of coal or gas, the energy consumption is huge, and the energy is one of main emission sources of carbon dioxide. To achieve the carbon neutralization goal, the use and consumption of fossil energy needs to be drastically cut down. The heat pump can fully utilize various renewable energy sources, is a typical, practical and low-carbon new energy technology, and becomes a first choice for replacing fossil fuel boilers.
CO 2 The compression heat pump utilizes the characteristics of transcritical circulation, low-temperature and low-pressure CO 2 Compressed by a compressor and then enters a supercritical region, sensible heat is generated between the compressed gas and an external medium in a cooler to release heat, and cooled high-pressure CO 2 Enters an expansion valve to be throttled to a low-temperature low-pressure two-phase state, then enters an evaporator to absorb heat, is evaporated and then enters a compressor again, and the most basic CO is 2 And (4) performing transcritical circulation. However, the key problem in the prior art that limits its alternative boilers for heat supply is that of CO 2 The compression heat pump has insufficient gas-water heat exchange in the heat supply process, on one hand, the water supply temperature is insufficient, and on the other hand, CO is caused 2 The temperature in the pipeline of the compression heat pump is too high, thereby affecting the working performance of the compressor.
Based on the above problems, the prior art still has the problem of containing CO 2 There is a need for an improved heating system for compression heat pumps.
SUMMERY OF THE UTILITY MODEL
In view of this, an embodiment of the present invention provides a device containing CO 2 A heating system for a compression heat pump, comprising:
CO 2 compression type heat pump, said CO 2 Compression type heat pump bagThe system comprises a compressor, a multi-section cooler, an expansion valve and an evaporator, wherein the compressor, the multi-section cooler, the expansion valve and the evaporator are sequentially connected through a first pipeline to form a first loop;
the absorption heat pump comprises a generator, an absorber, a condenser and an evaporator;
the first cooler and the generator are connected by a second pipeline and form a second loop;
the second cooler, the absorber and the condenser are sequentially connected through a heating pipeline to form a heating loop; and
the third cooler and the evaporator are connected by a third line and form a third circuit.
In some embodiments, the first circuit and the second circuit undergo a first heat exchange at the first cooler, the first heat exchange being for CO in the first circuit 2 Releasing heat for a first cooling, water in the second loop absorbing the CO 2 The heat released.
In some embodiments, the heating loop is an external circulation waterway loop, a water inlet end of the heating loop is connected with a heating water return pipe, and a water outlet end of the heating loop is connected with a heating water supply pipe.
In some embodiments, the first loop is in second heat exchange with the heating loop at the second cooler, CO in the first loop 2 Releasing heat for secondary cooling, and absorbing CO by water in heating loop 2 The released heat undergoes a first temperature rise.
In some embodiments, the first loop is heat exchanged with the third loop a third time at the third cooler, the third time to exchange for CO in the first loop 2 Releasing heat for a third cooling, the water of the third loop absorbing the CO 2 The heat released.
In some embodiments, the CO 2 In the third coolerThe temperature at the outlet of (2) reaches 40 ℃ or below.
In some embodiments, the heating loop performs a fourth heat exchange with the absorber and the condenser of the absorption heat pump, the fourth heat exchange releases heat for the absorber and the condenser, and the water of the heating loop absorbs the heat to perform a second temperature rise.
In some embodiments, the water of the heating circuit reaches a temperature of 70 ℃ and above at the outlet end.
In some embodiments, the evaporator is a water-water heat exchanger whose low temperature heat source comprises groundwater, sewage, reclaimed water.
In some embodiments, the evaporator is an air-to-water heat exchanger and the low temperature heat source of the air-to-water heat exchanger is air.
Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has at least:
the utility model discloses mainly solve the not enough and too high problem of gas temperature in heat pump system of heat pump heating temperature, through at CO 2 The compression heat pump is provided with a multi-stage cooler, namely a first cooler, a second cooler, a third cooler and high-temperature CO 2 The module can fully release heat, achieves the effect of cooling step by step, and solves the problem of CO 2 The problem of excessive temperature at the outlet of the cooler. Meanwhile, the multi-section cooler is matched with the absorption heat pump, so that the heat released by the high-temperature gas is fully utilized, the absorption heat pump can be driven by the heat, the heating water can be heated again, the temperature of the heating water at the outlet end reaches 70 ℃ or above, and the heating effect is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 shows a CO-containing chamber according to an embodiment of the present invention 2 The schematic diagram of a heating system of a compression heat pump.
In the figure: 1. a compressor; 2. a first cooler; 3. a second cooler; 4. a third cooler; 5. an expansion valve; 6. an evaporator; 7. a first pipeline; 8. a generator; 9. an absorber; 10. a condenser; 11. an evaporator; 12. a second pipeline; 13. a heating pipeline; 14. a third pipeline.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.
It should be noted that, in the embodiments of the present invention, all expressions using "first", "second" and "third" are used to distinguish two entities with the same name but different names or different parameters, and it is to be noted that "first", "second" and "third" are only used for convenience of expression and should not be construed as limitations of the embodiments of the present invention, and the following embodiments do not describe any more.
In this embodiment, as shown in fig. 1, a schematic view of an embodiment of the heating system of the present invention is shown, in which CO 2 The compression heat pump includes compressor 1, first cooler 2, second cooler 3, third cooler 4, expansion valve 5, and evaporimeter 6, and wherein, compressor 1, first cooler 2, second cooler 3, third cooler 4, expansion valve 5, and evaporimeter 6 are connected in order by first pipeline 7 and are formed first return circuit, and wherein, the cooling portion that first cooler 2, second cooler 3, third cooler 4 formed is called the multistage formula cooler in the embodiment of the utility model.
In the present embodiment, the absorption heat pump includes four modules, which are a generator 8, an absorber 9, a condenser 10, and an evaporator 11. The generator and the evaporator continuously absorb heat supplied by an external heat source, the heat absorbed by the generator is transferred to the absorber through a working medium, for example, the working medium is a lithium bromide solution, the heat absorbed by the evaporator is transferred to the condenser, and the absorber and the condenser continuously generate heat effect to heat water flowing through the absorption heat pump.
In one embodiment of the invention, the first cooler 2 and the generator 8 of the heating system are connected by a second pipeline 12 and form a second loop, the second cooler 3, the absorber 9 and the condenser 10 are connected in sequence by a heating pipeline 12 and form a heating loop, and the third cooler 4 and the evaporator 11 are connected by a third pipeline 14 and form a third loop.
Referring to fig. 1, in one embodiment of the present invention, the low temperature and low pressure CO is generated during the circulation and heat exchange of the first circuit 2 CO entering the compressor 1 and compressed in the compressor 1 2 Entering supercritical region, followed by CO 2 Enters the multi-stage cooler through a first line 7. CO of the first loop 2 First heat exchange with the water of the second circuit at the first cooler 2, the CO of the first circuit 2 The first cooling is completed by releasing heat, and after the water of the second loop absorbs the heat, sensible heat-like heat release is generated between the water and a medium in a generator 10 of the absorption heat pump, so that the absorption heat pump is started.
CO 2 CO of the first circuit enters the second cooler 3 through the first line 7 2 A second heat exchange takes place with the water of the heating circuit at the second cooler 3. The heating loop is an external circulation waterway, the water inlet end of the heating pipeline 13 is connected with a heating water return pipe, and the water outlet end of the heating pipeline 13 is connected with a heating water supply pipe. CO in the first loop 2 Releasing heat again at the second cooler 3 to complete secondary cooling, completing primary heating by absorbing heat at the second cooler 3 by heating return water entering from the water inlet end of the heating pipeline 13, completing secondary heating at the absorber 9 and the condenser 10 of the absorption heat pump by heating pipeline 12, entering the heated water into an external heating water supply pipe through the water outlet end of the heating pipeline 13, and discharging water from the water outlet end of the heating pipeline 13 after heating return water is heated twice, wherein the water outlet temperature reaches 70 ℃ and above, so that the water outlet temperature can meet the water temperature requirement of the heating pipeline.
In one embodiment of the invention, CO 2 Into the third cooler 4 via the first line 7, the CO in the first line 7 2 A third heat exchange takes place at the third cooler 4 with the third line 14, the CO in the first line 7 2 And the third temperature reduction is completed by releasing heat.
CO 2 The temperature of the outlet of the multi-section cooler is less than or equal to 40 ℃ after three times of temperature reduction, and the CO with low temperature and high pressure is obtained 2 Enters an expansion valve 5 through a pipeline for throttling to a low-temperature low-pressure two-phase state, then enters an evaporator 6 through a pipeline, and is low-temperature low-pressure CO 2 The heat of the low temperature heat source is absorbed and evaporated and enters the compressor 1 via a pipe, which is a cycle, and it is understood that the cycle may be repeated several times according to the cooling or heating requirement.
The embodiment of the utility model provides a through in CO 2 The compression heat pump is provided with a multi-stage cooler, namely a first cooler, a second cooler and a third cooler, and high-temperature CO 2 The module can fully release heat, thereby achieving the effect of cooling step by step and solving the problem of CO 2 The problem of excessive temperature at the outlet of the cooler. Meanwhile, the multi-section cooler is matched with the absorption heat pump, so that the heat released by the high-temperature gas is fully utilized, the absorption heat pump can be driven by the heat, the heating water can be heated again, the temperature of the heating water at the outlet end reaches 70 ℃ or above, and the heating effect is ensured.
In some embodiments of the present invention, the heating backwater of the heating pipeline can enter the absorber 9 and the condenser 10 of the absorption heat pump for heating, and then enter the second cooler 3 for heating and warming, and the heating sequence can be adjusted as required without being limited by the sequence described in the above embodiments.
In some embodiments of the invention, the CO 2 The main circulation pipeline is preferably a pressure-bearing pipeline, and the pressure-bearing performance of the main circulation pipeline is higher than that of a common conventional heat pump system.
In some embodiments of the present invention, the evaporator 6 may be a water-water heat exchange gas, for example, the low temperature heat source is groundwater, underground soil, sewage, reclaimed water, and various residual heats.
In some embodiments of the present invention, the evaporator 6 may be an air-water heat exchange gas, for example, the low temperature heat source is air, i.e. an air source heat pump.
In this application, the use of the term "meaning" is intended to include the term "meaning". The use of definite or indefinite articles is not intended to indicate cardinality. In particular, references to "the" object or "an" and "an" object are intended to mean one of many such objects possible. Furthermore, the conjunction "or" may be used to convey simultaneous features, rather than mutually exclusive schemes. In other words, the conjunction "or" should be understood to include "and/or". The term "comprising" is inclusive and has the same scope as "comprising". The above-described embodiments are possible examples of the embodiments of the present invention, and are given only for the purpose of clearly understanding the principles of the present invention by those skilled in the art.
Those skilled in the art will understand that: the above discussion of any embodiment is merely exemplary, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; the technical features of the above embodiments or of the different embodiments can also be combined with each other under the general idea of the invention and produce many other variations of the different aspects of the embodiments of the invention as described above, which are not provided in the detailed description for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be within the scope of the claims.
Claims (10)
1. Containing CO 2 A heating system for a compression heat pump, comprising:
CO 2 compression type heat pump, said CO 2 The compression heat pump comprises a compressor, a multi-stage cooler, an expansion valve and an evaporator, wherein the compressor, the multi-stage cooler, the expansion valve and the evaporator are sequentially connected through a first pipelineA first circuit, the multi-stage chiller comprising a first chiller, a second chiller, and a third chiller;
the absorption heat pump comprises a generator, an absorber, a condenser and an evaporator;
the first cooler and the generator are connected by a second pipeline and form a second loop;
the second cooler, the absorber and the condenser are sequentially connected through a heating pipeline to form a heating loop; and
the third cooler and the evaporator are connected by a third line and form a third circuit.
2. A composition according to claim 1 comprising CO 2 Heating system of a compression heat pump, characterized in that the first circuit and the second circuit perform a first heat exchange at the first cooler, the first heat exchange being CO in the first circuit 2 Releasing heat for a first cooling, water in the second loop absorbing the CO 2 The heat released.
3. A composition according to claim 1 comprising CO 2 The heating system of the compression heat pump is characterized in that the heating loop is an external circulation water circuit, the water inlet end of the heating loop is connected with a heating water return pipe, and the water outlet end of the heating loop is connected with a heating water supply pipe.
4. A composition according to claim 1 comprising CO 2 The heating system of the compression heat pump is characterized in that the first loop and the heating loop carry out second heat exchange at the second cooler, and CO in the first loop 2 Releasing heat for secondary cooling, and absorbing CO by water in heating loop 2 The released heat undergoes a first temperature rise.
5. A composition according to claim 1 comprising CO 2 A heating system of a compression heat pump is characterized in that,the first loop and the third loop exchange heat at the third cooler for a third time, the third heat exchange being for CO in the first loop 2 Releasing heat for a third cooling, the water of the third loop absorbing the CO 2 The heat released.
6. A composition according to claim 1 comprising CO 2 The heating system of the compression heat pump is characterized in that CO 2 The temperature at the outlet of the third cooler reached 40 ℃ and below.
7. A composition according to claim 1 comprising CO 2 The heating system of the compression heat pump is characterized in that the heating loop and the absorber and the condenser of the absorption heat pump carry out fourth heat exchange, the fourth heat exchange is realized by the heat released by the absorber and the condenser, and the water of the heating loop absorbs the heat to carry out second temperature rise.
8. A composition according to claim 7 comprising CO 2 The heating system of the compression heat pump is characterized in that the temperature of water in the heating loop at the water outlet end reaches 70 ℃ or above.
9. A composition according to claim 1 comprising CO 2 The heating system of the compression heat pump is characterized in that the evaporator is a water-water heat exchanger, and a low-temperature heat source of the water-water heat exchanger comprises underground water, sewage and reclaimed water.
10. A composition according to claim 1 comprising CO 2 The heating system of the compression heat pump is characterized in that the evaporator is an air-water heat exchanger, and a low-temperature heat source of the air-water heat exchanger is air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123272708.7U CN217604208U (en) | 2021-12-23 | 2021-12-23 | Containing CO 2 Heating system of compression heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123272708.7U CN217604208U (en) | 2021-12-23 | 2021-12-23 | Containing CO 2 Heating system of compression heat pump |
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| Publication Number | Publication Date |
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| CN217604208U true CN217604208U (en) | 2022-10-18 |
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| CN202123272708.7U Active CN217604208U (en) | 2021-12-23 | 2021-12-23 | Containing CO 2 Heating system of compression heat pump |
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