CN117419516A - PV/T solar heat pump combined drying system - Google Patents

Abstract

The invention discloses a PV/T solar heat pump combined drying system, which belongs to the field of solar heat pump combined drying. A PV/T solar heat pump combined drying system includes a heat pump heating system, a solar photovoltaic photothermal system and a drying box; The heat pump heating system also includes a compressor, copper tubes, heat exchangers, condensers and regenerators. The compressor, copper tubes, heat exchangers, condensers and regenerators form a closed loop; the photovoltaic photothermal The system also includes a flat plate collector, an inverter and a battery; one end of the copper pipe is connected to the flat plate collector, the other end of the copper pipe extends into the compressor, and a ventilation pipe is fixedly connected to the side wall of the drying box. , the ventilation pipe is connected to a heat exchanger, the upper side of the heat exchanger is equipped with a recuperator, and the inner wall of the drying box is equipped with a condenser; it can solve the problem of high energy consumption and drying efficiency in the existing drying technology. This reduces the problem of drying and thus reduces the power consumption during the drying process.

Description

A PV/T solar heat pump combined drying system

Technical field

The present invention relates to the technical field of solar heat pump combined drying, and more specifically, to a PV/T solar heat pump combined drying system.

Background technique

Solar energy is an emerging energy and renewable energy development research. It is the most eye-catching and most widely used clean energy. The development and utilization of global solar energy will be the mainstream in the future. The principle of solar drying technology is to use solar energy to evaporate the water on the surface of the object to achieve the purpose of drying. Solar equipment usually consists of solar collectors, fans, and drying chambers.

The heat pump absorbs heat from low-temperature heat sources, converting low-grade heat energy into high-grade heat energy. It can absorb heat from the natural environment or waste heat resources, thereby obtaining more output heat energy than the input.

PV/T technology is a technology that combines solar PV modules with thermal collectors. Not only is thermal gain obtained, but more importantly, the PV/T system reduces the temperature of the PV module, thereby improving the photoelectric conversion efficiency.

The existing drying system currently does not have a structure that can apply photovoltaic modules to the heat pump heating system, which is inconvenient to save energy. The existing drying technology has problems such as high energy consumption and low drying efficiency.

Contents of the invention

1. Technical problems to be solved

In view of the problems existing in the prior art, the purpose of the present invention is to provide a PV/T solar heat pump combined drying system, which can solve the problems of high energy consumption and low drying efficiency in the existing drying technology, thereby reducing the drying process. power consumption in.

2.Technical solutions

In order to solve the above problems, the present invention adopts the following technical solutions.

A PV/T solar heat pump combined drying system, including a heat pump heating system, a solar photovoltaic photothermal system and a drying box;

The heat pump heating system also includes a compressor, copper tubes, heat exchangers, condensers and regenerators, and the compressor, copper tubes, heat exchangers, condensers and regenerators form a closed loop;

The photovoltaic photothermal system also includes a flat plate collector, an inverter and a battery;

One end of the copper pipe is connected to the flat plate heat collector, and the other end of the copper pipe extends into the compressor. A ventilation pipe is fixedly connected to the side wall of the drying box, and the ventilation pipe is connected to a heat exchanger. A regenerator is installed on the upper side of the heater, and a condenser is installed on the inner wall of the drying box.

Further, the heat pump heating system also includes a liquid storage tank provided on one side of the compressor, and the end face of the copper pipe extends into the liquid storage tank and is equipped with an expansion valve.

Furthermore, the inner cavity of the drying box is also equipped with an axial flow fan and a circulating fan. The axial flow fan is fixedly installed on the end face of the ventilation pipe, and the axial flow fan faces upward. The circulating fan is fixedly installed on the inner wall of the drying box. Located on the upper side of the axial flow fan.

Further, an evaporator is provided on one side of the compressor, and the copper pipe is connected to the evaporator.

Furthermore, a solenoid valve is also installed on the side wall of the copper tube.

Further, a base plate is fixedly connected to the bottom of the flat plate collector, the battery is mounted on the upper side of the base plate, and the inverter is located on the upper side of the battery.

Further, a pipe is fixedly connected to the bottom of the heat exchanger, and the pipe extends into the drying box.

3. Beneficial effects

Compared with the existing technology, the advantages of the present invention are:

(1) This technical solution utilizes the efficient integration of solar energy and heat pump technology to develop a stable and efficient solar heat pump combined drying system, and uses PV/T collectors to improve solar energy utilization while reducing system power consumption.

(2) This technical solution recycles the waste heat in the exhaust gas by installing a heat exchanger, improves the energy utilization and stability of the system, and avoids the durability, economy, safety and other issues faced in the use of phase change thermal storage materials. .

Description of the drawings

Figure 1 is a schematic structural diagram of the present invention;

Figure 2 is a perspective view of the present invention;

Figure 3 is a rear perspective view of the present invention;

Figure 4 is an enlarged view of position A in Figure 1 of the present invention;

Figure 5 is the wiring diagram of the PLC electronic control system of the invented axial flow fan.

Explanation of numbers in the figure:

1. Flat plate collector; 2. Inverter; 3. Battery; 4. Copper pipe; 5. Compressor; 6. Expansion valve; 7. Liquid storage tank; 8. Heat exchanger; 9. Pipeline; 10. Axial flow fan; 11. Drying box; 12. Circulation fan; 13. Condenser; 14. Regenerator; 15. Solenoid valve; 16. Ventilation pipe; 17. Evaporator; 18. Bottom plate.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on The embodiments of the present invention and all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Example 1:

Please refer to Figure 1-5, a PV/T solar heat pump combined drying system, including a heat pump heating system, a solar photovoltaic photothermal system and a drying box 11;

Utilizing the efficient integration of solar energy and heat pump technology, a stable and efficient solar heat pump combined drying system has been developed, and uses PV/T collectors to improve solar energy utilization while reducing system power consumption.

The heat pump heating system also includes a compressor 5, a copper tube 4, a heat exchanger 8, a condenser 13 and a regenerator 14. The heat pump heating system is composed of a compressor 5, a copper tube 4, a heat exchanger 8, a condenser 13 and a regenerator 14. closed loop;

Among them, the condenser 13 is used as a heat exchanger for cooling gas or steam and condensing it into a liquid; the condenser transfers heat around the high-temperature gas or steam to the cooling medium (such as water or air), thereby cooling the gas or steam and condensing it into a liquid. liquid; and the regenerator 14 mainly transfers waste heat from high-temperature fluid to low-temperature fluid through heat transfer to achieve effective utilization of energy; therefore, the condenser and the regenerator are two different types of heat exchange equipment. The condenser is mainly used to cool and condense gas or steam into a liquid, while the regenerator is mainly used to recover waste heat and achieve effective use of energy; by combining the two, the energy utilization and stability of the system can be improved and avoid Issues such as durability, economy, and safety that must be faced when using phase change thermal storage materials.

The photovoltaic photothermal system also includes a flat plate collector 1, an inverter 2 and a battery 3;

Specifically, the flat plate collector 1 uses a PV/T collector, which combines photovoltaic power generation and solar thermal utilization equipment. It uses solar radiation to generate photovoltaic power, and at the same time uses solar radiation to absorb heat from the collector surface to achieve and optimize the effects of photovoltaic power generation and thermal energy utilization;

The advantage of the PV/T flat plate collector 1 is that it has the functions of photovoltaic power generation and thermal energy utilization, improving energy utilization efficiency. It can generate electricity by generating electricity while providing needs such as hot water or heating through thermal energy utilization. Compared with using photovoltaic power generation or solar water heaters alone, PV/T flat plate collector 1 can effectively save space and reduce the initial investment and operating costs of the energy system.

One end of the copper pipe 4 is connected to the flat plate heat collector 1, and the other end of the copper pipe 4 extends into the compressor 5. A ventilation pipe 16 is fixedly connected to the side wall of the drying box 11, and the ventilation pipe 16 is connected to the heat exchanger 8. The heat exchanger The upper side of 8 is equipped with a regenerator 14, which is arranged in a conical shape, and the inner wall of the drying box 11 is equipped with a condenser 13.

Among them, the regenerator 14 is used as a heat exchange device for recovering waste heat in the system or process. Its main function is to transfer waste heat from high-temperature fluid to low-temperature fluid through heat transfer, thereby realizing effective utilization of energy during the recovery process; the regenerator 14 is usually composed of two independent pipelines, namely the heat source fluid and the Heat receiving fluid; the waste heat high-temperature fluid enters the regenerator 14 through the heat source pipeline. After heat exchange, the heat is transferred to the lower temperature fluid in the heat receiving pipeline. In this way, the waste heat energy is effectively recovered and utilized. .

The heat pump heating system also includes a liquid storage tank 7 arranged on one side of the compressor 5. The end surface of the copper pipe 4 extends into the liquid storage tank 7 and an expansion valve 6 is installed.

Specifically, the expansion valve 6 is another important component in the refrigeration cycle. It is usually located between the compressor and the evaporator; the function of the expansion valve 6 is to throttle the high-temperature and high-pressure refrigerant liquid from the compressor outlet to a low-temperature and low-pressure state to achieve expansion of the refrigerant.

The inner cavity of the drying box 11 is also provided with an axial flow fan 10 and a circulation fan 12. The axial flow fan 10 is fixedly installed on the end face of the ventilation pipe 16, and the axial flow fan 10 faces upward. The circulation fan 12 is fixedly installed on the inner wall of the drying box 11 and is located in the axial flow direction. The upper side of the fan 10.

Specifically, the circulation fan 12 sends the heat released by the condenser 13 into the drying box 11 , and the axial flow fan 10 sends the waste heat generated in the drying box 11 into the heat exchanger 8 .

An evaporator 17 is provided on one side of the compressor 5, and the copper pipe 4 is connected to the evaporator 17.

Specifically, the evaporator 17 is used to convert liquid into gas; it uses heating to convert molecules in the liquid into gaseous state, thereby achieving the purpose of evaporation and realizing heat transfer.

The side wall of the copper pipe 4 is also equipped with a solenoid valve 15. The solenoid valve 15 is a device that uses electromagnetic principles to control fluid flow; it is composed of an electromagnetic coil and a valve body. The generation and disappearance of the magnetic field of the electromagnetic coil is controlled by powering on and off, thereby controlling the opening and closing of the valve body. Solenoid valve 15 is commonly used in various automation systems, including industrial control, hydraulics, pneumatics and other fields.

A base plate 18 is fixedly connected to the bottom of the flat plate collector 1, the battery 3 is assembled on the upper side of the base plate 18, and the inverter 2 is located on the upper side of the battery 3.

Flat plate collector 1 is mainly composed of solar panels and heat absorbers. Solar panels convert sunlight into electrical energy to generate photovoltaic power; heat absorbers are usually placed on the back or sides of solar panels to absorb the heat radiated by the solar energy and convert it into thermal energy or hot water;

Among them, the heat absorber is an existing mature technology, so it will not be described in detail in this solution.

Two pipes 9 are fixedly connected to the bottom of the heat exchanger 8 , and the two pipes 9 extend into the drying box 11 .

Among them, the heat exchanger 8 is usually composed of two independent fluid channels, namely a heat source fluid and a heat receiving fluid. When the heat source fluid passes through the heat exchanger 8, it transfers heat to the heat receiving fluid, causing its temperature to increase or decrease, and the temperature of the heat source fluid decreases or increases accordingly.

The above are only preferred embodiments of the present invention; however, the protection scope of the present invention is not limited thereto. Any person familiar with the technical field who is familiar with the technical field shall make equivalent substitutions or changes based on the technical solutions and improvement concepts of the present invention within the technical scope disclosed in the present invention, and shall be covered by the protection scope of the present invention.

Claims (7)

1. The utility model provides a PV/T solar heat pump joint drying system which characterized in that: comprises a heat pump heating system, a solar photovoltaic photo-thermal system and a drying box (11);

the heat pump heating system further comprises a compressor (5), a copper pipe (4), a heat exchanger (8), a condenser (13) and a heat regenerator (14), wherein the compressor (5), the copper pipe (4), the heat exchanger (8), the condenser (13) and the heat regenerator (14) form a closed loop;

the photovoltaic photo-thermal system further comprises a flat plate collector (1), an inverter (2) and a storage battery (3);

the bottom of the flat plate heat collector (1) is fixedly connected with a bottom plate (18), the storage battery (3) is assembled on the upper side of the bottom plate (18), and the inverter (2) is positioned on the upper side of the storage battery (3);

copper pipe (4) one end is connected with flat plate collector (1), copper pipe (4) other end extends to in compressor (5), fixedly connected with ventilation pipe (16) on drying cabinet (11) lateral wall, ventilation pipe (16) are connected with heat exchanger (8), heat exchanger (8) upside is equipped with regenerator (14), drying cabinet (11) inner wall is equipped with condenser (13).

2. A PV/T solar heat pump combined drying system according to claim 1, wherein: the heat pump heating system further comprises a liquid storage tank (7) arranged on one side of the compressor (5), and the end face of the copper pipe (4) extends into the liquid storage tank (7) and is provided with an expansion valve (6).

3. A PV/T solar heat pump combined drying system according to claim 1, wherein: the inner cavity of the drying box (11) is also provided with an axial flow fan (10) and a circulating fan (12), the axial flow fan (10) is fixedly assembled on the end face of the ventilating pipe (16), the axial flow fan (10) faces upwards, and the circulating fan (12) is fixedly installed on the inner wall of the drying box (11) and is located on the upper side of the axial flow fan (10).

4. A PV/T solar heat pump combined drying system according to claim 1, wherein: an evaporator (17) is arranged on one side of the compressor (5), and the copper pipe (4) is connected with the evaporator (17).

5. A PV/T solar heat pump combined drying system according to claim 1, wherein: and an electromagnetic valve (15) is also arranged on the side wall of the copper pipe (4).

6. A PV/T solar heat pump combined drying system according to claim 1, wherein: the heat regenerator (14) is arranged in a conical shape.

7. A PV/T solar heat pump combined drying system according to claim 1, wherein: the bottom of the heat exchanger (8) is fixedly connected with a pipeline (9), and the pipeline (9) extends into the drying box (11).