CN108444015A - A kind of cold supply system that heat pipe is coupled with ground heat exchanger and solar panel - Google Patents

Abstract

The invention discloses a cooling system coupled with a heat pipe, a buried pipe heat exchanger and a solar panel, which is characterized in that it includes a heat pipe (1), a water exchange tank (2), a solar panel (3), and an insulating material ( 4), sloping roof (5), power line (6), water pump (7), circulating water pipe (8), buried pipe heat exchanger (9), independent grid-connected inverter (10), power grid ( 11). The invention uses the heat pipe to take away the indoor heat, and provides power through the water pump, so that the circulating water and the heat exchanger in the circulating pipeline transfer heat to the water body or soil with lower temperature and less temperature fluctuation, so as to achieve the purpose of cooling. This system saves the compressor, cooling water, refrigerant and other components and materials in the traditional cooling system, directly saving the energy consumption of the compressor; the electric energy of the water pump is mainly provided by solar photovoltaic power generation; The principle of phase change exothermic heat and medium condensation, the required temperature difference is small, and the heat transfer capacity is extremely strong, which makes the refrigeration efficiency of this system higher.

Description

A cooling system coupled with heat pipes, buried pipe heat exchangers and solar panels

technical field

The invention relates to a heat pipe cooling energy-saving system, in particular to a cooling system coupled with a heat pipe, a buried pipe heat exchanger and a solar panel. In summer, the heat of the room is transferred to the soil or water body to provide cooling for the room, and the power of the water pump is mainly provided by solar panels.

Background technique

With the acceleration of urbanization in our country, more and more buildings need cooling systems to cool down the room in summer. At present, the most commonly used cooling system is cooling tower + chiller, which consists of chilled water circulation system, cooling water circulation system and refrigerant circulation system, including compressors, circulating water pumps, cooling towers, evaporators, condensers, expansion Valves and other components. Because the system has strong adaptability under various climatic conditions, it is widely used. However, the compressor of this system consumes a lot of energy and needs three-phase high-voltage electricity as power. At the same time, using chilled water to absorb air heat requires a large temperature difference between chilled water and air, resulting in high operating costs. In addition, the system exhausts heat directly into the atmosphere, exacerbating the urban heat island effect. The system also requires a large amount of refrigerant, and its environmental performance is poor.

In addition to the cooling tower + chiller cooling system, there are also air-cooled cooling system and ground source heat pump cooling system. The cooling system of the air-cooled unit eliminates the need for condensed water and cooling towers, and the system is relatively simple, but its cooling efficiency is severely restricted by the outdoor air temperature. This system still needs a compressor and a refrigerant, and its energy saving and environmental protection are relatively poor.

The ground source heat pump cooling system exchanges heat between condensed water and soil or water, eliminating the need for a cooling tower system and avoiding the discharge of heat to the atmosphere, reducing the urban heat island effect. The temperature fluctuation range is much smaller than the atmospheric temperature fluctuation range, so that the cooling efficiency of the system is guaranteed, but the condensate water pipeline of the system is long, and the condensate water pump consumes a lot of energy. More critically, the system also needs compressors and refrigerants, and its energy saving and environmental protection are still not outstanding.

The heat pipe is a closed tube whose exterior is in contact with two media of different temperatures. A section inside the heat pipe is filled with a liquid medium. When the temperature of the material outside the heat pipe is higher than the boiling point of the medium, the medium absorbs a large amount of heat and evaporates, turning into a gaseous medium, which moves to the other section of the heat pipe and releases heat to the temperature outside the heat pipe. Another substance slightly lower, the gaseous medium becomes liquid, and then flows back to the original position to continue absorbing heat and evaporating. The heat pipe is based on the principle of phase change heat absorption by medium evaporation and phase change heat release by medium condensation. The required temperature difference is small and the heat transfer capacity is extremely strong. It is widely used in the fields of electronic component cooling and solar heaters, and is rarely used in cooling. field applications.

Contents of the invention

The present invention proposes a cooling system in which the heat pipe is coupled with the buried pipe heat exchanger and the solar panel, that is, the heat pipe is used to take away the heat in the room, and the power is provided by the water pump to make the circulating water in the circulation pipeline and the heat exchanger Transfer heat to water body or soil with low temperature and small temperature fluctuation, so as to achieve the purpose of cooling. This system saves the compressor, cooling water, refrigerant and other components and materials in the traditional cooling system, directly saving the energy consumption of the compressor; the electric energy of the water pump is mainly provided by solar photovoltaic power generation; The phase change of heat and medium condensation releases heat, the required temperature difference is small, and the heat transfer capacity is extremely strong, which makes the refrigeration efficiency of this system higher.

The system composition of the present invention includes heat pipe (1), heat exchange tank (2), solar panel (3), heat insulation material (4), sloping roof (5), power line (6), water pump (7), circulating water pipe (8), buried tube heat exchanger (9), independent grid-connected inverter (10), power grid (11).

In the present invention, heat pipes are arranged under the sloping roof, and a water exchange tank is arranged on the roof ridge. The lower end of the heat pipe is in direct contact with the indoor air, and the upper end of the heat pipe is inserted into the water exchange tank to directly contact the circulating water in the water exchange tank. The lower end of the heat pipe absorbs the heat of the air in the room. , the liquid medium at the lower end of the heat pipe absorbs heat and evaporates, turns into a gaseous state, rises to the upper end of the heat pipe, and releases heat to the circulating water in the heat exchange tank, the gaseous medium at the upper end of the heat pipe becomes liquid, and flows back to the lower end of the heat pipe, and continues It absorbs the heat in the room, absorbs heat and evaporates again, and so on. After the water in the water tank absorbs the heat from the upper end of the heat pipe, it flows to the buried pipe heat exchanger through the circulating water pipe, and the buried pipe heat exchanger releases the heat to the water body or soil, and then the circulating water flows back to the heat exchange tank through the circulating water pipe. Continue to absorb the heat from the upper end of the heat pipe. The flow of circulating water is driven by water pumps. The power of the water pumps is mainly provided by the solar panels on the sloping roof, and the insufficient part is supplemented by the grid.

The part of the heat pipe of the present invention in contact with the air in the room is corrugated or pin-fin shaped, which can increase the contact area with the air, enhance convective heat transfer, and coat the black paint with high thermal conductivity on its surface to enhance radiation heat transfer .

The beneficial effects of the present invention are: the compressor, chilled water pipeline and cooling tower in the conventional cooling system are directly omitted, the cooling system is simplified, and there is no energy consumption of the compressor; at the same time, the electric energy of the circulating water pump is mainly provided by the solar energy on the sloping roof. Provided by battery panels, it reduces the initial investment and operating costs of the system; secondly, the heat in the room is discharged to the soil or water, which reduces the urban heat island effect, and the system does not require refrigerants, which is more environmentally friendly.

Description of drawings

This specification includes the following three drawings.

Fig. 1 is a roof assembly diagram of a cooling system in which heat pipes, buried pipe heat exchangers and solar panels are coupled according to the present invention.

Fig. 2 is a schematic diagram of the system of the present invention.

Fig. 3 is a cross section of the heat exchange tank and a schematic diagram of the upper end of the heat pipe of the present invention.

Part names and corresponding marks shown in the figure: heat pipe (1), heat exchange tank (2), solar panel (3), pitched roof (5), heat insulation material (4), power line (6), water pump (7), circulating water pipe (8), buried pipe heat exchanger (9), independent grid-connected inverter (10), power grid (11).

Detailed ways

The present invention will be further described below in conjunction with accompanying drawings and examples.

As shown in Figure 1 and Figure 2, the heat pipe (1) is hoisted under the sloping roof (5), the lower surface of the lower part of the heat pipe (1) is in contact with the indoor air, and the upper part of the heat pipe (1) is inserted into the heat exchange tank (2). The hot water tank (2) and the buried pipe heat exchanger (9) are connected by a circulating water pipe (8), the water pump (7) is installed on the circulating water pipe (8), and the solar panel (3) is installed above the sloping roof (5). Between the heat pipe (1) and the sloping roof (5), between the solar panel (3) and the sloping roof (5), on the outside of the heat exchange tank (2) and on the outside of the circulating water pipe (8) are closely pasted with heat insulating material (4) , the solar panel (3) is connected with the inverter (10), the water pump (7) and the power grid (11) through the power line (6).

As shown in Figure 2, straight arrows indicate the flow direction of circulating water.

As shown in Figure 3, the boiling point of the medium stored in the lower end of the tube (1) is 23-25°C. When the indoor air temperature is higher than the boiling point of the medium, the heat is transferred to the lower end of the heat pipe (1) through the wall of the heat pipe (1). The liquid medium absorbs heat and evaporates into a gas medium, which rises to the upper end of the heat pipe (1), and the heat at the upper end of the heat pipe (1) is transferred to the circulating water in the heat exchange tank through the wall of the heat pipe (1), and the heat pipe (1) ) The gaseous medium at the upper end of the interior releases heat and liquefies, and then flows back to the lower end, thus absorbing heat in a cycle. The part of the heat pipe (1) in contact with the air in the room is corrugated or pin-finned to increase the contact area with the air and enhance convective heat transfer. The surface is coated with high thermal conductivity black paint to enhance radiation heat transfer.

As shown in Figure 1 and Figure 2, when there is sufficient sunshine during the day, the solar panel (3) outputs sufficient direct current, which is converted into alternating current by the independent grid-connected inverter (10) to supply power for the water pump (7), The excess power is sent to the grid (11). When the output power of the solar panel (3) is insufficient, the power grid (11) supplies power for the water pump (7).

As shown in Figure 1 and Figure 2, the buried pipe heat exchanger (9) is buried in the soil or water body in the form of vertical buried pipe or horizontal buried pipe, and the buried pipe heat exchanger (9) transfers heat Released into the water body or soil, this part of the heat will be dispersed to the surrounding soil or water body, and then the soil or water body will return to normal temperature.

Finally, it needs to be specially explained: the above-mentioned embodiment is only to illustrate the principle of the cooling system coupled with the heat pipe, the buried pipe heat exchanger and the solar panel in a clear and easy-to-understand manner, rather than limiting the present invention to the shown And the specific architectural model or scope of application mentioned above, so all obvious corresponding modifications, extensions or equivalent systems that may be used belong to the patent scope of the application for the present invention.

Claims (4)

1. A cooling system coupled with heat pipes, buried pipe heat exchangers and solar panels, characterized in that it includes heat pipes (1), heat exchange tanks (2), solar panels (3), and heat insulating materials (4 ), sloping roof (5), power line (6), water pump (7), circulating water pipe (8), buried pipe heat exchanger (9), independent grid-connected inverter (10), power grid (11 ), the heat pipe (1) is installed under the sloping roof (5), the solar panel (3) is installed above the sloping roof (5), between the heat pipe (1) and the sloping roof (5), the solar panel (3) and Between the sloping roof (5), on the outside of the heat exchange tank (2), and on the outside of the circulating water pipe (8), the heat insulating material (4) is closely pasted, the heat exchange tank (2) is installed on the ridge of the roof, and the upper end of the heat pipe (1) is inserted into the heat exchange tank (2), the heat exchange tank (2) is connected to the buried pipe heat exchanger (9) through the circulating water pipe (8), the water pump (7) is installed on the circulating water pipe (8), and the solar panel (3) is passed through the power line (6) Connect with the independent grid-connected inverter (10), the water pump (7) and the power grid (11). 2. A cooling system coupled with heat pipes, buried pipe heat exchangers and solar panels according to claim 1, characterized in that: the buried pipe heat exchanger (9) is installed in water or soil, buried Pipe types include horizontal buried pipe and vertical buried pipe. 3. A cooling system coupled with heat pipes, buried pipe heat exchangers and solar panels according to claim 1, characterized in that: the lower surface of the lower end of the heat pipe (1) is in direct contact with the indoor air, and the heat pipe (1) ) The upper end is inserted into the heat exchange tank (2) by being directly embedded or screwed in, and is in direct contact with the circulating water for heat exchange. 4. A cooling system coupled with heat pipes, buried pipe heat exchangers and solar panels according to claim 3, characterized in that: the part of the heat pipe (1) in contact with the air in the room is in the shape of corrugations or pin ribs, so that Increase the contact area with air or circulating water, enhance convective heat transfer, and coat the surface with black paint with high thermal conductivity to enhance radiation heat transfer.