Heat pump coupling system

Abstract

The invention provides a heat pump coupling system which comprises a heat pump module used for providing cooling and heating loads; the radiation refrigeration module is used for providing a cold load; the power supply module comprises a photovoltaic module, an energy storage module and a power grid module, is connected with the heat pump module through a switch assembly, and is used for supplying power to the heat pump module; and the control module is used for controlling the switch assembly according to the electric quantity provided by the photovoltaic module, the electric quantity of the energy storage module and the required electric quantity of the heat pump unit, and controlling the power supply mode of the heat pump module. Solar energy, stored energy and the power grid are used for supplying power to the heat pump unit, the radiation refrigeration technology assists in providing cooling loads, effective utilization of clean energy of solar energy and air energy is fully achieved, electricity consumption of the power grid is reduced, meanwhile, the cooling load consumption, the operation cost and the initial investment cost of the heat pump are reduced, and green electricity utilization, energy conservation and carbon reduction are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a heat pump coupling system. Background Art

[0002] At present, the electricity consumed by air conditioners in large public buildings accounts for about half of the total electricity consumed by buildings, so the development of energy-saving air conditioners for industrial and commercial use is a top priority. The heat source tower heat pump system is no different from a traditional chiller in summer conditions, and has the characteristics of high cooling efficiency; in winter conditions, the circulating medium in the system becomes an antifreeze solution, which relies on the low freezing point of the solution to extract heat from outdoor air in a low temperature environment, avoiding the problem of easy frost formation in air source heat pumps. It has the characteristics of high heating efficiency and has been increasingly promoted and applied.

[0003] In related technologies, the heat source tower heat pump system still uses grid electricity to drive compressors and other electrical components, and grid electricity is still mainly based on traditional thermal power generation, which is not conducive to energy conservation and carbon reduction. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a heat pump coupling system.

[0005] The main contents of the present invention are as follows:

[0006] 1. The present invention utilizes solar clean energy and equipment such as photovoltaic panels to realize photovoltaic power generation and is used to power a heat pump system.

[0007] 2. The present invention utilizes energy storage technology to store the power when the system has too much power, release it when the system has too little power, and use it to power the heat pump system.

[0008] 3. The present invention utilizes clean energy from air and realizes a certain cooling load supply through radiation cooling technology, thereby meeting a portion of the cooling load demand and sharing a portion of the cooling load supply of the heat pump system.

[0009] 4. The present invention utilizes the coupling and application of photovoltaic technology, energy storage technology and related control methods to achieve power supply mode switching of the heat pump system, effectively and flexibly utilizes photovoltaic power and stored power, ensures the effective and stable operation of the heat source tower heat pump system, and reduces the consumption of power grid electricity.

[0010] To achieve the above-mentioned purpose, an embodiment of the present invention proposes a heat pump coupling system including: a heat pump module, which is used to provide cooling and heating loads; a radiation refrigeration module, which is used to provide cooling loads; a power supply module, which includes: a photovoltaic module, an energy storage module and a power grid module, and the power supply module is connected to the heat pump module through a switch component, and the power supply module is used to supply power to the heat pump module; and a control module, which is used to control the power supply mode of the heat pump module.

[0011] The heat pump coupling system proposed in the present invention may also have the following additional technical features:

[0012] According to one embodiment of the present invention, the control module is specifically used for: when the power provided by the photovoltaic module is greater than the sum of the power demand of the heat pump unit and the set power difference, controlling the power of the heat pump module to be provided entirely by the photovoltaic module, and the excess power of the photovoltaic module is input into the energy storage module for storage; when the power provided by the photovoltaic module is less than the sum of the power demand of the heat pump unit and the set power difference, and when the sum of the power provided by the photovoltaic module and the power of the energy storage module is greater than the sum of the power demand of the heat pump unit and the set power difference, controlling the power consumption of the heat pump module to be provided entirely by the photovoltaic module and the energy storage module; and when the sum of the power provided by the photovoltaic module and the power storage module is less than the sum of the power demand of the heat pump unit and the set power difference, controlling the power consumption of the heat pump module to be provided by the photovoltaic module, the energy storage module and the power grid module, or all provided by the power grid module only.

[0013] According to one embodiment of the present invention, the power Qm of the heat pump module is a function of the distribution power Pm.

[0014] According to one embodiment of the present invention, the heat pump module includes: a main unit, a heat source tower, a solution purification device, a solution concentration control device and a solution regeneration device.

[0015] According to one embodiment of the present invention, the radiation cooling module includes: SiO2 (silicon dioxide) fiber membrane and / or poly (N-isopropylacrylamide) temperature-sensitive gel.

[0016] According to one embodiment of the present invention, the SiO2 fiber membrane is located in the upper layer, and the poly (N-isopropylacrylamide) thermosensitive gel is located in the lower layer.

[0017] According to one embodiment of the present invention, the photovoltaic module includes: a photovoltaic component; a first inverter unit, wherein a DC input terminal of the first inverter unit is connected to a DC output terminal of the photovoltaic component, and the first inverter unit is used to invert the DC power output by the photovoltaic component into AC power and keep the output power constant.

[0018] According to one embodiment of the present invention, the energy storage module includes: an energy storage component; a second inverter unit, wherein a DC input end of the second inverter unit is connected to an output end of the energy storage component, and the second inverter unit is used to invert the DC power output by the energy storage component into AC power and keep the output voltage constant.

[0019] According to one embodiment of the present invention, the cooling load ratio of the radiation cooling module and the heat pump module is configured as 1:4.

[0020] According to one embodiment of the present invention, the switch assembly includes: a first circuit breaker, which is arranged between the photovoltaic module and the AC bus; a second circuit breaker, which is arranged between the energy storage module and the AC bus; a third circuit breaker, which is arranged between the power grid module and the AC bus; and a fourth circuit breaker, which is arranged between the heat pump module and the AC bus.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention utilizes solar clean energy and photovoltaic equipment to realize photovoltaic power generation, which is used to power the heat pump system, reducing the consumption of power grid electricity and achieving energy conservation and emission reduction.

[0023] 2. The present invention utilizes energy storage technology to store power when the system has too much power, release it when the system has too little power, and use it to power the heat pump system, thereby reducing the power consumption of the power grid and achieving energy conservation and emission reduction.

[0024] 3. The present invention utilizes clean energy from air and realizes a certain cold load supply through radiation refrigeration technology, meets part of the cold load demand, reduces the cold load supply of the heat pump system, reduces the operating energy consumption of the heat source tower heat pump system, and realizes energy conservation and emission reduction.

[0025] 4. The present invention utilizes the coupling and application of photovoltaic technology, energy storage technology and related control methods to achieve power supply mode switching of the heat pump system, effectively utilizes photovoltaic power and stored power, ensures the effective and stable operation of the heat pump system, reduces the consumption of power grid power, and achieves energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a heat pump coupling system according to an embodiment of the present invention;

[0027] Figure 2 is a schematic structural diagram of a heat pump coupling system according to another embodiment of the present invention.

[0028] Reference numerals: heat pump module 1, radiation cooling module 2, power supply module 3, control module 4, photovoltaic module 31, energy storage module 32, grid module 33, first circuit breaker K1, second circuit breaker K2, third circuit breaker K3 and fourth circuit breaker K4. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Figure 1 is a schematic diagram of the structure of a heat pump coupling system according to an embodiment of the present invention. Figure 1 As shown, the heat pump coupling system includes: a heat pump module 1, a radiation cooling module 2, a power supply module 3 and a control module 4.

[0031] Among them, the heat pump module 1 is used to provide cooling and heating loads; the radiation refrigeration module 2 is used to provide cooling loads; the power supply module 3 includes: a photovoltaic module 31, an energy storage module 32 and a power grid module 33, the power supply module 3 is connected to the heat pump module through a switch component, and the power supply module 3 is used to supply power to the heat pump module 1; the control module 4 is used to control the switch component according to the power provided by the photovoltaic module, the power of the energy storage module and the required power of the heat pump unit, and control the power supply mode of the heat pump module 1.

[0032] Specifically, photovoltaic power generation can be realized by using the photovoltaic module 31 and used for powering the heat pump module 1. The energy storage module 32 can be used to store the power generated by the photovoltaic module 31 when it is too much, release it when necessary, and use it for powering the heat pump module 1 or accessing the Internet. At the same time, the radiation refrigeration module 2 can realize a certain cold load supply through radiation refrigeration technology, meet part of the cold load demand, and share part of the cold load supply of the heat pump system. Therefore, solar energy, energy storage, and power grid are used to power the heat pump unit, and radiation refrigeration technology assists in providing cold load, fully realizing the effective utilization of solar energy and air energy clean energy, improving the operating energy efficiency of the heat source tower heat pump unit, ensuring the stable operation of the heat source tower heat pump unit, reducing the power consumption of the power grid, and reducing the cold load consumption, operating costs, and initial investment costs of the heat pump, thereby realizing green electricity consumption and energy saving and carbon reduction.

[0033] In one embodiment of the present invention, Figure 2 As shown, the heat pump module 1 includes: a main unit, a heat source tower, a solution purification device, a solution concentration control device and a solution regeneration device. The power Qm of the heat pump module 1 is a function of the distribution power Pm, that is, Q m=f(Pm), which can be specifically:

[0034] Qm=k1*Pm1*dt1+k2*Pm2*dt2+k3*Pm3*dt3+k4*Pm4*dt4;

[0035] Among them, Qm is the total power consumption during the heat pump module collection period; Pm1 is the unit compressor distribution power or real-time power consumption; Pm2 is the unit fan distribution power or real-time power consumption, Pm3 is the unit water pump distribution power or real-time power consumption; Pm4 is the unit other electrical components distribution power or real-time power consumption; dt1, dt2, dt3, dt4 are the first to fourth collection periods respectively; k1, k2, k3, k4 are the first to fourth weighting coefficients.

[0036] In one embodiment of the present invention, Figure 2 As shown, the photovoltaic module 31 includes: a photovoltaic component and a first inverter unit, the DC input end of the first inverter unit is connected to the DC output end of the photovoltaic component, and the first inverter unit is used to invert the DC power output by the photovoltaic component into AC power and keep the output power constant.

[0037] Specifically, the first inverter unit may adopt a constant power control strategy to keep the output power constant.

[0038] According to one embodiment of the present invention, Figure 2 As shown, the energy storage module 32 includes: an energy storage component and a second inverter unit, wherein the DC input end of the second inverter unit is connected to the output end of the energy storage component, and the second inverter unit is used to invert the DC power output by the energy storage component into AC power and keep the output voltage constant.

[0039] Specifically, the second inverter unit may adopt a constant voltage and constant frequency control strategy to keep the output voltage constant.

[0040] In one embodiment of the present invention, Figure 2 As shown, the switch assembly includes: a first circuit breaker K1, a second circuit breaker K2, a third circuit breaker K3 and a fourth circuit breaker K4. The first circuit breaker K1 is arranged between the photovoltaic module 31 and the AC busbar AC; the second circuit breaker K2 is arranged between the energy storage module 31 and the AC busbar; the third circuit breaker K3 is arranged between the power grid module 33 and the AC busbar AC; the fourth circuit breaker K4 is arranged between the heat pump module 1 and the AC busbar AC.

[0041] In one embodiment of the present invention, the radiation cooling module 2 includes: SiO2 fiber membrane and / or poly-N-isopropylacrylamide thermosensitive gel. If the radiation cooling module 2 includes SiO2 fiber membrane and poly-N-isopropylacrylamide thermosensitive gel, the SiO2 fiber membrane can be located in the upper layer, and the poly-N-isopropylacrylamide thermosensitive gel can be located in the lower layer.

[0042] Specifically, the radiant refrigeration material module is composed of radiant refrigeration material, which is a passive refrigeration technology that uses thermal radiation to achieve cooling. Compared with the active refrigeration technology based on compressors, it has no energy consumption and no greenhouse gas emissions. It achieves the purpose of cooling by covering a confined area with a spectrally selective material with an enhancement effect, releasing heat in the form of thermal radiation into the low-temperature outer space.

[0043] In a specific embodiment of the present invention, a double-layer structure spectrally adaptive radiation cooling material is used, in which the upper layer of the radiation cooling material is a SiO2 fiber membrane, and the lower layer of the radiation cooling material is a poly (N-isopropylacrylamide) PNIPAM thermosensitive gel, which is used to regulate the mid-infrared emissivity outside the 8-13μm band, to achieve a higher wide-spectrum emissivity in a high temperature environment and a higher selective incidence rate in a medium and low temperature environment, so as to achieve the effect of adaptive radiation cooling.

[0044] In a specific embodiment of the present invention, the cooling load ratio configuration of the radiation cooling module and the heat pump module may be 1:4.

[0045] In one embodiment of the present invention, the control module 4 is specifically used for: when the power Qg provided by the photovoltaic module is greater than the sum of the power demand Qm of the heat pump unit and the set power difference dQ, the power of the heat pump module 1 is controlled to be provided entirely by the photovoltaic module 31, and the excess power of the photovoltaic module 31 is input into the energy storage module 32 for storage; when the power Qg provided by the photovoltaic module is less than the sum of the power demand Qm of the heat pump unit and the set power difference dQ, and when the sum of the power Qg provided by the photovoltaic module and the power Qc of the energy storage module is greater than the sum of the power demand Qm of the heat pump unit and the set power difference dQ, the power of the heat pump module 1 is controlled to be provided entirely by the photovoltaic module 31 and the energy storage module 32; when the sum of the power Qg provided by the photovoltaic module and the power Qc of the energy storage module is less than the sum of the power demand Qm of the heat pump unit and the set power difference dQ, the power consumption of the heat pump module 1 is controlled to be provided by the photovoltaic module 31, the energy storage module 32 and the power grid module 33, or all of it is provided by only the power grid module 33.

[0046] Specifically, the power difference dQ is set in advance according to the power demand of the heat pump unit. dQ can generally be set to 1%-5% of the power demand Qm of the heat pump unit to provide a control margin. If Qg>(Qm+dQ), it means that the power provided by the photovoltaic module 31 is sufficient to meet the needs of the heat pump module. The first circuit breaker K1 and the fourth circuit breaker K4 are closed, and the second circuit breaker K2 and the third circuit breaker K3 are disconnected. The power of the heat pump module 1 is all provided by the photovoltaic module 31. If there is excess power, the second circuit breaker K2 can be controlled to close, and the excess power can be input into the energy storage module 32 for storage. If Qg<(Qm+dQ) and (Qg+Qc)>(Qm+dQ), that is, the power provided by the photovoltaic module 31 is insufficient to meet the needs of the heat pump module, but the photovoltaic module 31 and the energy storage module 2 can meet the needs of the heat pump unit, then the first circuit breaker K1, the second circuit breaker K2, and the fourth circuit breaker K4 are closed, and the third circuit breaker K3 is disconnected, and the power of the heat pump module is all provided by the photovoltaic module 31 and the energy storage module 32. If (Qg+Qc))<(Qm+dQ), it means that the photovoltaic module 31 and the energy storage module 2 cannot meet the needs of the heat pump module, and the first circuit breaker K1, the second circuit breaker K2, the third circuit breaker K3 and the fourth circuit breaker K4 can be controlled to be closed, and the photovoltaic module 31, the energy storage module 32 and the power grid module 33 can be combined to supply power to the heat pump module 1, or K3 and K4 can be controlled to be closed, the first circuit breaker K1 and the second circuit breaker K2 are disconnected, and only the power grid module 33 supplies power to the heat pump module 1.

[0047] In summary, according to the heat pump coupling system of the embodiment of the present invention, solar energy clean energy and photovoltaic equipment are used to realize photovoltaic power generation, which is used for powering the heat pump system, reducing the consumption of power grid electricity and achieving energy conservation and emission reduction; energy storage technology is used to store the power when the system power is too much, and release it when the system power is low, and use it to power the heat pump system, reducing the consumption of power grid electricity and achieving energy conservation and emission reduction; air energy clean energy is used to realize a certain cold load supply through radiation refrigeration technology, meet part of the cold load demand, reduce the cold load supply of the heat pump system, reduce the operating energy consumption of the heat source tower heat pump system, and achieve energy conservation and emission reduction; the present invention utilizes the coupling and application of photovoltaic technology, energy storage technology and related control methods to realize the switching of power supply modes of the heat pump system, effectively utilizes photovoltaic power and stored power, ensures the effective and stable operation of the heat pump system, reduces the consumption of power grid electricity and achieves energy conservation and emission reduction.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] It should be understood that each part of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system.

[0051] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0052] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0053] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A heat pump coupling system, characterized in that: include: A heat pump module, the heat pump module is used to provide cooling and heating loads; A radiation cooling module, wherein the radiation cooling module is used to provide a cooling load; A power supply module, the power supply module comprising: a photovoltaic module, an energy storage module and a power grid module, the power supply module is connected to the heat pump module through a switch assembly, and the power supply module is used to supply power to the heat pump module; A control module, wherein the control module is used to control a power supply mode of the heat pump module.

2. The heat pump coupling system according to claim 1, characterized in that: The control module is specifically used for: When the power provided by the photovoltaic module is greater than the sum of the power demand of the heat pump unit and the set power difference, the power of the heat pump module is controlled to be provided entirely by the photovoltaic module, and the excess power of the photovoltaic module is input into the energy storage module for storage; When the power provided by the photovoltaic module is less than the sum of the power demand of the heat pump unit and the set power difference, and when the sum of the power provided by the photovoltaic module and the power of the energy storage module is greater than the sum of the power demand of the heat pump unit and the set power difference, the power of the heat pump module is controlled to be provided entirely by the photovoltaic module and the energy storage module; When the sum of the power provided by the photovoltaic module and the power of the energy storage module is less than the sum of the power demand of the heat pump unit and the set power difference, the power consumption of the heat pump module is controlled to be provided by the photovoltaic module, the energy storage module and the grid module, or all provided by the grid module.

3. The heat pump coupling system according to claim 1, characterized in that: The power consumption of the heat pump module is a function of the distribution power.

4. The heat pump coupling system according to claim 1, characterized in that: The heat pump module comprises: a main unit, a heat source tower, a solution purification device, a solution concentration control device and a solution regeneration device.

5. The heat pump coupling system according to claim 1, characterized in that: The radiation cooling module comprises: SiO2 fiber membrane and / or poly (N-isopropylacrylamide) thermosensitive gel.

6. The heat pump coupling system according to claim 5, characterized in that: The SiO2 fiber membrane is located in the upper layer, and the poly (N-isopropylacrylamide) thermosensitive gel is located in the lower layer.

7. The heat pump coupling system according to claim 1, characterized in that: The photovoltaic module comprises: Photovoltaic panels; A first inverter unit, wherein a DC input terminal of the first inverter unit is connected to a DC output terminal of the photovoltaic module, and the first inverter unit is used to invert the DC power output by the photovoltaic module into AC power and keep the output power constant.

8. The heat pump coupling system according to claim 1, characterized in that: The energy storage module comprises: Energy storage components; A second inverter unit, wherein a DC input terminal of the second inverter unit is connected to an output terminal of the energy storage component, and the second inverter unit is used for inverting the DC power output by the energy storage component into AC power and maintaining a constant output voltage.

9. The heat pump coupling system according to claim 1, characterized in that: The cooling load ratio of the radiation cooling module and the heat pump module is configured to be 1:

4.

10. The heat pump coupling system according to claim 1, characterized in that: The switch assembly comprises: A first circuit breaker, wherein the first circuit breaker is arranged between the photovoltaic module and the AC bus; A second circuit breaker, wherein the second circuit breaker is arranged between the energy storage module and the AC bus; A third circuit breaker, the third circuit breaker is arranged between the power grid module and the AC bus; A fourth circuit breaker is arranged between the heat pump module and the AC bus.

Images