Heat pump coupling system

Abstract

The utility model 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 the energy-saving and environment-friendly effects are achieved. And green electricity utilization, energy conservation and carbon reduction are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technical field, concretely relates to a heat pump coupling system. BACKGROUND

[0002] At present, the electric energy consumed by large public building air conditioners accounts for about half of the total building electric energy, so developing energy-saving air conditioners for industrial and commercial use is the top priority. The heat source tower heat pump system is no different from the traditional water chiller in summer working conditions, with the characteristics of high cooling efficiency. In winter working conditions, the circulating working medium in the system becomes an anti-freezing solution, which relies on the low freezing point of the solution to take heat from outdoor air in low temperature environment, avoiding the problem of easy frosting of air source heat pumps, with the characteristics of high heating efficiency, and has been more and more popular and applied.

[0003] In related technologies, the heat source tower heat pump system still uses grid electric energy to drive the operation of electric elements such as compressors, and the grid electric energy is still mainly generated by traditional thermal power generation, which is not conducive to energy saving and carbon reduction. INVENTION CONTENTS

[0004] The utility model provides a heat pump coupling system to solve the above technical problems.

[0005] The main content of the utility model is as follows:

[0006] 1. The utility model utilizes solar clean energy and photovoltaic panel and other equipment, can realize photovoltaic power generation, and is used for power supply of the heat pump system.

[0007] 2. The utility model utilizes energy storage technology, stores the system electric quantity when it is too much, releases the system electric quantity when it is too little, and is used for power supply of the heat pump system.

[0008] 3. The utility model utilizes air energy clean energy, realizes certain cold load supply through radiation refrigeration technology, meets part of the cold load demand, and shares part of the cold load supply of the heat pump system.

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

[0010] To achieve the above object, the embodiment of the utility model provides a heat pump coupling system includes: heat pump module, the heat pump module is used for providing cold and hot load, radiation refrigeration module, the radiation refrigeration module is used for providing cold load, power supply module, the power supply module includes: photovoltaic module, energy storage module and power grid module, the power supply module is connected with the heat pump module through switch subassembly, the power supply module is used for the power supply of heat pump module, control module, the control module is used for controlling the power supply mode of heat pump module.

[0011] The heat pump coupling system proposed in the utility model can also have the following additional technical features:

[0012] According to one embodiment of the utility model, the control module is specifically used for: when the power provided by the photovoltaic module is greater than the sum of the required power of the heat pump unit and the set power difference, controlling the power of the heat pump module to be provided by the photovoltaic module entirely, 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 required power 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 required power of the heat pump unit and the set power difference, controlling the power of the heat pump module to be provided by the photovoltaic module and the energy storage module entirely; and 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 required power 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 provided by the power grid module only.

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

[0014] According to one embodiment of the utility model, the heat pump module includes: a host computer, 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 utility model, the radiation refrigeration module includes: SiO2 (silicon dioxide) fiber membrane and / or poly-N-isopropyl acrylamide temperature-sensitive gel.

[0016] According to one embodiment of the utility model, the SiO2 fiber membrane is located in the upper layer, and the poly-N-isopropyl acrylamide temperature-sensitive gel is located in the lower layer.

[0017] According to one embodiment of the utility model, the photovoltaic module includes: a photovoltaic assembly, a first inverter unit, the direct current input end of the first inverter unit is connected with the direct current output end of the photovoltaic assembly, and the first inverter unit is used for inverting the direct current output by the photovoltaic assembly into alternating current and keeping the constant output power.

[0018] According to one embodiment of the utility model, the energy storage module comprises: an energy storage assembly; a second inverter unit, the direct current input end of second inverter unit is connected with the output end of energy storage assembly, second inverter unit is used for inverting the direct current of energy storage assembly output into alternating current and keeping the constant of output voltage.

[0019] According to one embodiment of the utility model, the cold load ratio of the radiation refrigeration module and the heat pump module is 1:4.

[0020] According to one embodiment of the utility model, the switch assembly comprises: a first circuit breaker, the first circuit breaker is arranged between the photovoltaic module and the alternating current bus; a second circuit breaker, the second circuit breaker is arranged between the energy storage module and the alternating current bus; a third circuit breaker, the third circuit breaker is arranged between the grid module and the alternating current bus; a fourth circuit breaker, the fourth circuit breaker is arranged between the heat pump module and the alternating current bus.

[0021] The utility model discloses the beneficial effect:

[0022] 1. The utility model discloses a solar energy clean energy and photovoltaic equipment, realize photovoltaic power generation, be used for the power supply of heat pump system, reduced the consumption of grid electric energy, realized energy saving and emission reduction.

[0023] 2. The utility model discloses the energy storage technology, when the system electric quantity is too much, store it, when the system electric quantity is little, release it, and be used for the power supply of heat pump system, reduced the consumption of grid electric energy, realized energy saving and emission reduction.

[0024] 3. The utility model discloses the air energy clean energy, through radiation refrigeration technology, realize certain cold load supply, satisfy a part of cold load demand, reduce the cold load supply of heat pump system, reduce the operation energy consumption of heat source tower heat pump system, realized energy saving and emission reduction.

[0025] 4. The utility model discloses the coupling and application of photovoltaic technology, energy storage technology and relevant control method, realize the power supply mode switching of heat pump system, effectively utilize photovoltaic electric energy and stored electric energy, guarantee the effective stable operation of heat pump system, reduced the consumption of grid electric energy, realized energy saving and emission reduction. DRAWINGS

[0026] Figure 1 It is the structure schematic diagram of heat pump coupling system according to one embodiment of the utility model;

[0027] Figure 2 It is the structure schematic diagram of heat pump coupling system according to another embodiment of the utility model.

[0028] Figure reference numerals: Heat pump module 1, radiant cooling module 2, power supply module 3, control module 4, photovoltaic module 31, energy storage module 32, power grid module 33, first circuit breaker K1, second circuit breaker K2, third circuit breaker K3, and fourth circuit breaker K4. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

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

[0031] The heat pump module 1 is used to provide heating and cooling loads; the radiant cooling 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 switching assembly and is used to supply power to the heat pump module 1; the control module 4 is used to control the switching assembly according to the power provided by the photovoltaic module, the power of the energy storage module, and the power demand of the heat pump unit, and to control the power supply mode of the heat pump module 1.

[0032] Specifically, photovoltaic module 31 generates electricity to power heat pump module 1, while energy storage module 32 stores excess electricity generated by photovoltaic module 31 and releases it when necessary for power supply to heat pump module 1 or grid connection. Simultaneously, radiant cooling module 2 provides a certain amount of cooling load through radiant cooling technology, meeting some cooling load demand and sharing some of the cooling load supply of the heat pump system. Thus, by utilizing solar energy, energy storage, and the grid to power the heat pump unit, and radiant cooling technology to assist in providing cooling load, the effective utilization of clean energy sources such as solar and air source heat pumps is fully realized. This improves the operating efficiency of the heat pump unit, ensures stable operation of the heat pump unit, reduces grid power consumption, and simultaneously reduces the cooling load, operating costs, and initial investment cost of the heat pump, achieving green electricity use and energy conservation and carbon reduction.

[0033] In one embodiment of this utility model, such as Figure 2 As shown, 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 electrical charge Qm of heat pump module 1 is a function of the power distribution Pm, i.e., Qmm =f(Pm), and specifically can be:

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

[0035] Wherein, Qm is the total power in the heat pump module acquisition cycle; Pm1 is the unit compressor power distribution or real-time power consumption; Pm2 is the unit fan power distribution or real-time power consumption, Pm3 is the unit water pump power distribution or real-time power consumption; Pm4 is the unit other electrical devices power distribution or real-time power consumption; dt1, dt2, dt3, dt4 are the first to the fourth acquisition cycle; k1, k2, k3, k4 are the first to the fourth weighting coefficient.

[0036] In an embodiment of the present application, as shown in Figure 2 The photovoltaic module 31 includes a photovoltaic assembly and a first inverter unit, the DC input end of the first inverter unit is connected with the DC output end of the photovoltaic assembly, and the first inverter unit is used for inverting the DC power output by the photovoltaic assembly into AC power and keeping the constant output power.

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

[0038] According to an embodiment of the present application, as shown in Figure 2 The energy storage module 32 includes an energy storage assembly and a second inverter unit, the DC input end of the second inverter unit is connected with the output end of the energy storage assembly, and the second inverter unit is used for inverting the DC power output by the energy storage assembly into AC power and keeping the constant output voltage.

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

[0040] In an embodiment of the present application, as shown in Figure 2 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 bus AC; the second circuit breaker K2 is arranged between the energy storage module 31 and the AC bus; the third circuit breaker K3 is arranged between the grid module 33 and the AC bus AC; and the fourth circuit breaker K4 is arranged between the heat pump module 1 and the AC bus AC.

[0041] In one embodiment of the present application, the radiation refrigeration module 2 comprises: a SiO2 fiber film and / or a poly-N-isopropyl acrylamide temperature-sensitive gel. If the radiation refrigeration module 2 comprises the SiO2 fiber film and the poly-N-isopropyl acrylamide temperature-sensitive gel, the SiO2 fiber film can be located in the upper layer, and the poly-N-isopropyl acrylamide temperature-sensitive gel can be located in the lower layer.

[0042] Specifically, the radiation refrigeration material module is composed of a radiation refrigeration material, which is a passive refrigeration technology that realizes cooling by using thermal radiation. Compared with active refrigeration technology based on a compressor, the radiation refrigeration material has no energy consumption and no greenhouse gas emission, and it releases heat in the form of thermal radiation to the outer space of the universe at low temperature by covering a spectrum-selective material with an enhancement effect in a closed area, so as to achieve the purpose of cooling.

[0043] In one specific embodiment of the present application, a double-layer structure spectrum adaptive radiation refrigeration material is adopted, which is composed of a SiO2 fiber film as the upper-layer radiation refrigeration material and a poly-N-isopropyl acrylamide PNIPAM temperature-sensitive gel as the lower-layer radiation refrigeration material. The SiO2 fiber film and the poly-N-isopropyl acrylamide PNIPAM temperature-sensitive gel are used to control the mid-infrared emissivity outside the 8-13 mu band, realize higher wide-spectrum emissivity in a high-temperature environment and higher selective emissivity in a medium-low temperature environment, and achieve the effect of adaptive radiation refrigeration.

[0044] In one specific embodiment of the present application, the cold load proportion of the radiation refrigeration module and the heat pump module can be 1:4.

[0045] In one embodiment of the present application, the control module 4 is specifically used for: when the power Qg provided by the photovoltaic module is greater than the sum of the required power Qm of the heat pump unit and the set power difference dQ, controlling the power of the heat pump module 1 to be provided by the photovoltaic module 31 entirely, 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 required power 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 required power Qm of the heat pump unit and the set power difference dQ, controlling the power of the heat pump module 1 to be provided by the photovoltaic module 31 and the energy storage module 32 entirely; 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 required power Qm of the heat pump unit and the set power difference dQ, controlling the power consumption of the heat pump module 1 to be provided by the photovoltaic module 31, the energy storage module 32 and the power grid module 33, or provided by only the power grid module 33.

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

[0047] In summary, the heat pump coupling system according to the embodiments of the present application utilizes solar clean energy and photovoltaic devices to realize photovoltaic power generation for power supply of the heat pump system, reduces the consumption of grid power, and realizes energy saving and emission reduction. The energy storage technology is utilized to store excess power and release the stored power when the system power is insufficient, and the stored power is used for power supply of the heat pump system, thereby reducing the consumption of grid power and realizing energy saving and emission reduction. The air energy clean energy is utilized to realize certain cold load supply through the radiation refrigeration technology, thereby meeting part of the cold load demand, reducing the cold load supply of the heat pump system, reducing the operation energy consumption of the heat source tower heat pump system, and realizing energy saving and emission reduction. The present application utilizes the coupling and application of photovoltaic technology, energy storage technology and related control methods to realize power supply mode switching of the heat pump system, effectively utilizes photovoltaic power and stored power, ensures effective and stable operation of the heat pump system, reduces the consumption of grid power, and realizes energy saving and emission reduction.

[0048] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0049] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0050] In addition, each functional unit in each embodiment of the utility model can be integrated in a processing module, or each unit can be physically present alone, or two or more units can be integrated in a module. The integrated module can be realized in the form of hardware or in the form of software function module. The integrated module, if realized in the form of software function module and sold or used as an independent product, can also be stored in a computer readable storage medium.

[0051] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model. It should be noted that for ordinary skilled in the art, without departing from the technical principles of the utility model, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection scope of the utility model.

Claims

1. A heat pump coupling system, characterized in that, include: A heat pump module, which provides heating and cooling loads; A radiant cooling module, which is used to provide a cooling load; The power supply module includes a photovoltaic module, an energy storage module, and a power grid module. The power supply module is connected to the heat pump module via a switching assembly and is used to supply power to the heat pump module. A control module is provided for controlling the power supply mode of the heat pump module.

2. The heat pump coupling system according to claim 1, characterized in that, 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.

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

4. The heat pump coupling system according to claim 3, 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.

5. The heat pump coupling system according to claim 1, characterized in that, The photovoltaic module includes: Photovoltaic modules; The first inverter unit has its DC input terminal connected to the DC output terminal of the photovoltaic module. The first inverter unit is used to invert the DC power output by the photovoltaic module into AC power and maintain a constant output power.

6. The heat pump coupling system according to claim 1, characterized in that, The energy storage module includes: Energy storage components; The second inverter unit has its DC input terminal connected to the output terminal of the energy storage component. The second inverter unit is used to invert the DC power output by the energy storage component into AC power and maintain a constant output voltage.

7. The heat pump coupling system according to claim 1, characterized in that, The switching assembly includes: The first circuit breaker is installed between the photovoltaic module and the AC bus. The second circuit breaker is disposed between the energy storage module and the AC bus. The third circuit breaker is installed between the power grid module and the AC bus. A fourth circuit breaker is disposed between the heat pump module and the AC bus.

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