CN210463654U

CN210463654U - Energy-saving photovoltaic photo-thermal heat pump

Info

Publication number: CN210463654U
Application number: CN201921261740.5U
Authority: CN
Inventors: 林志坚; 刘茂玲; 彭程; 田娟; 邓玲芳
Original assignee: Shanghai Boyang New Energy Technology Co ltd
Current assignee: Shanghai Boyang New Energy Technology Co ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-05-05
Anticipated expiration: 2029-08-06

Abstract

The utility model discloses an energy-saving photovoltaic photo-thermal heat pump, which comprises a PVT plate, an evaporator, a water tank, a compressor, an expansion valve and a water pump; the PVT panel comprises a photovoltaic panel and a heat collector; a second temperature sensor is arranged between the photovoltaic panel and the heat collector; the evaporator is provided with a medium circulating pipeline; a condenser is arranged in the water tank; the water tank is respectively connected with a domestic hot water outlet pipe and a tap water inlet pipe; a first temperature sensor and a water level sensor are respectively arranged in the water tank; the water pump is respectively connected with the medium circulation pipeline and the constant pressure liquid supplementing pipe; an expansion valve is arranged on the upper connecting pipeline of the water tank and the evaporator; the lower connecting pipeline of the water tank and the evaporator is provided with a compressor and a four-way valve. The utility model discloses an aspect has improved photoelectric conversion efficiency, and the waste heat of retrieving simultaneously has heated the refrigerant in the heat pump evaporator, can improve the coefficient of performance of heat pump.

Description

Energy-saving photovoltaic photo-thermal heat pump

Technical Field

The utility model relates to a heat pump technology, concretely relates to energy-saving photovoltaic light and heat pump.

Background

The solar energy is inexhaustible, the solar energy resources in China are rich, the solar photovoltaic panel is used for converting the solar energy into the electric energy with higher grade, and the solar photovoltaic panel is pollution-free, safe and reliable. However, the efficiency of the monocrystalline silicon solar cell is 16% -20% in a standard state, that is, at least 80% of solar energy is converted into heat energy, and the higher the temperature of the photovoltaic cell is, the lower the photoelectric conversion efficiency is, and the too high temperature of the photovoltaic cell also affects the service life of the photovoltaic panel.

Photovoltaic light and heat pump has the problem of two aspects at present, first, when not having the sunshine radiation, can not absorb the heat from the air to lead to the heat pump can't heat. Secondly, when sunlight radiates but the heat pump does not work, the heat of the heat collector cannot be dissipated, so that the photoelectric efficiency is reduced.

Therefore, a heat pump capable of heating in various weather conditions is urgently needed, and when sunlight is sufficient, the heat collector can well dissipate heat, the safety of the heat collector is guaranteed, and the service life of the heat collector is prolonged.

Disclosure of Invention

The utility model provides an energy-saving photovoltaic photo-thermal heat pump, aiming at the problems, comprising a PVT plate, an evaporator, a water tank, a compressor, an expansion valve and a water pump; the PVT panel comprises a photovoltaic panel and a heat collector; the evaporator is provided with a medium circulating pipeline; a condenser is arranged in the water tank; the water tank is respectively connected with a domestic hot water outlet pipe and a tap water inlet pipe; the water pump is respectively connected with the medium circulation pipeline and the constant pressure liquid supplementing pipe; an expansion valve is arranged on the upper connecting pipeline of the water tank and the evaporator; the lower connecting pipeline of the water tank and the evaporator is provided with a compressor and a four-way valve.

Further, the heat collector is a tube-plate heat collector or an inflation type heat collector.

Further, the water pump is a variable frequency pump.

Furthermore, a second temperature sensor is arranged between the photovoltaic panel and the heat collector.

Furthermore, a first temperature sensor and a water level sensor are respectively arranged in the water tank.

The utility model has the advantages that:

the utility model discloses photovoltaic light and heat system of mainly used distributing type to photovoltaic power generation is given first place to, and waste heat utilization is for assisting, utilizes the circulating medium in time to absorb and transfer the photovoltaic waste heat, has improved photoelectric conversion efficiency on the one hand, and the waste heat of retrieving simultaneously has heated the refrigerant in the heat pump evaporimeter, can improve the coefficient of performance of heat pump.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Reference numerals:

the device comprises a PVT plate 1, a photovoltaic plate 11, a heat collector 12, an evaporator 2, an expansion valve 3, a water tank 4, a compressor 5, a four-way valve 6, a medium circulating pipeline 7, a water pump 8, a hot water outlet pipe 9, a tap water inlet pipe 10, a water level sensor 14, a first temperature sensor 121, a second temperature sensor 122 and constant-pressure liquid supplement 13.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1, as shown in fig. 1, an energy-saving photovoltaic photo-thermal heat pump includes a PVT plate 1, an evaporator 2, a water tank 4, a compressor 5, an expansion valve 3, and a water pump 8; the PVT panel 1 comprises a photovoltaic panel 11 and a heat collector 12; the evaporator 2 is provided with a medium circulating pipeline 7 through which a circulating medium in the heat collector 12 flows; a condenser is arranged in the water tank 4; the water tank 4 is respectively connected with a domestic hot water outlet pipe 9 and a tap water inlet pipe 10; the water pump 8 is respectively connected with the medium circulation pipeline 7 and the constant pressure liquid supplementing pipe 13; an expansion valve 3 is arranged on the upper connecting pipeline of the water tank 4 and the evaporator 2; the lower connecting pipeline of the water tank 4 and the evaporator 2 is provided with a compressor 5 and a four-way valve 6.

The heat collector 12 is a tube-plate collector or an inflation collector.

The water pump 8 is a variable frequency pump.

A second temperature sensor 122 is arranged between the photovoltaic panel 11 and the heat collector 12.

A first temperature sensor 121 and a water level sensor 14 are respectively disposed in the water tank 4.

The utility model discloses by the water level of heat pump host computer unified control compressor, water tank and the motorised valve on the life hot water outlet pipe 9 of temperature and water tank and the pipeline of running water inlet tube 10, when the water level was less than the settlement water level in the water tank, open the motorised valve on the running water inlet pipe and carry out the moisturizing, when reaching the settlement water level, closed. When the water temperature is lower than the set value, the compressor is started, and water is heated by the heat pump until the set temperature is reached.

A temperature sensor is arranged between the photovoltaic panel back plate and the heat collector, the temperature of the photovoltaic panel back plate is monitored in real time, the rotating speed of the water pump is controlled, the circulating flow is changed, the temperature of the photovoltaic panel back plate is maintained at a set temperature, and the photoelectric conversion efficiency is highest. And PT is connected to the frequency converter by adopting PID control.

A temperature sensor is arranged in the water tank, so that the water temperature in the water tank can be monitored in real time, and the opening and closing of the valve can be controlled.

A water level sensor is arranged in the water tank, the water level in the water tank is monitored in real time, and the opening and closing of the valve are controlled.

The utility model discloses a working process:

the medium in the heat collector absorbs heat in the heat collector and then exchanges heat with the refrigerant in the evaporator, on one hand, the refrigerant is heated through heat conduction among the fins, on the other hand, air around the evaporator is preheated through heat convection, so that the evaporation temperature of the refrigerant in the evaporator is increased, the efficiency of the heat pump is improved, and the energy consumption of the heat pump is reduced.

When sunlight irradiates and the heat pump does not work, the medium expanded by heat in the heat collector exchanges heat with the evaporator, and the heat is dissipated through the fins of the evaporator, so that the photovoltaic panel is not overheated. When no sunlight is radiated, the heat pump can absorb heat from the air to normally heat.

When the environment temperature is low and the solar radiation is good, the evaporator can be prevented from frosting; when ambient temperature is very low have or not when solar radiation, the evaporimeter frosts easily, the utility model discloses can also carry out reverse defrosting to the evaporimeter and handle. Specifically, the low-temperature refrigerant is compressed by the compressor and then becomes a high-temperature refrigerant, the high-temperature refrigerant enters the evaporator 2 to be heated and defrosted, and then the refrigerant returns to the compressor through the expansion valve and the condenser in the water tank in sequence, and the cycle is repeated, so that the defrosting treatment of the evaporator is completed.

The electric energy generated by the photovoltaic module can be stored in the storage battery through the combiner box and the controller, and the direct current is converted into alternating current through the inverter to be used by the compressor; or directly using a dc compressor without passing through an inverter.

The utility model discloses the photovoltaic light and heat system of mainly used family or distributing type to photovoltaic power generation is given first place to, and waste heat utilization is for assisting, utilizes the circulating medium in time to absorb and transfer the photovoltaic waste heat, has improved photoelectric conversion efficiency on the one hand, and the waste heat of retrieving simultaneously has heated the refrigerant in the heat pump evaporimeter, can improve the coefficient of performance of heat pump.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. An energy-saving photovoltaic photo-thermal heat pump is characterized by comprising a PVT plate (1), an evaporator (2), a water tank (4), a compressor (5), an expansion valve (3) and a water pump (8); the PVT panel (1) comprises a photovoltaic panel (11) and a heat collector (12); the evaporator (2) is provided with a medium circulating pipeline (7); a condenser is arranged in the water tank (4); the water tank (4) is respectively connected with a domestic hot water outlet pipe (9) and a tap water inlet pipe (10); the water pump (8) is respectively connected with the medium circulation pipeline (7) and the constant pressure liquid supplementing pipe (13); an expansion valve (3) is arranged on an upper connecting pipeline of the water tank (4) and the evaporator (2); the lower connecting pipeline of the water tank (4) and the evaporator (2) is provided with a compressor (5) and a four-way valve (6).

2. The energy-saving photovoltaic photothermal heat pump according to claim 1, wherein the collector (12) is a tube-sheet collector or an inflation collector.

3. The energy-saving photovoltaic photo-thermal heat pump according to claim 1, wherein the water pump (8) is a variable frequency pump.

4. The energy-saving photovoltaic photothermal heat pump according to claim 1, wherein a second temperature sensor (122) is provided between the photovoltaic panel (11) and the heat collector (12).

5. The energy-saving photovoltaic photo-thermal heat pump according to claim 1, characterized in that a first temperature sensor (121) and a water level sensor (14) are respectively arranged in the water tank (4).