CN111879034A - Multi-evaporation-section heat pipe coupling buried pipe system - Google Patents

Abstract

The invention provides a multi-evaporation-section heat pipe coupling buried pipe system which comprises a horizontal buried pipe and a multi-evaporation-section gravity type heat pipe. The multi-evaporation-section gravity type heat pipe is buried in the lower portion of the horizontal buried pipe, the multiple evaporation sections of the multi-evaporation-section gravity type heat pipe are distributed in soil in all directions in a radiation mode, the heat transfer rate from the soil to the horizontal buried pipe is enhanced by utilizing the efficient heat conduction capacity of the heat pipe, and the heat exchange quantity between the soil and the horizontal buried pipe is effectively improved. The invention reduces the laying area of the buried pipe and has the characteristics of low cost, high efficiency and the like.

Description

A multi-evaporation section heat pipe coupling buried pipe system

technical field

The invention relates to a high-efficiency horizontal buried pipe system, which can be specifically applied to a ground source heat pump system.

Background technique

As a renewable energy source, soil source has the advantages of stable heat and large heat capacity. The ground source heat pump system can effectively utilize the heat in the soil and continuously provide heat for the building, which is an important development direction of the current building heating.

The current buried pipe system is mainly divided into vertical buried pipe system and horizontal buried pipe system. The vertical buried pipe has the disadvantages of difficult construction and high cost due to the need to drill the well in the vertical direction. Horizontal pipes are mainly laid in shallow soil. Although the construction difficulty and cost are reduced, they have the disadvantages of large floor space and rapid heat loss.

In order to enhance the heat exchange capacity of the horizontal buried pipe and the utilization rate of the deep soil, the Chinese patent "A Horizontal Buried Pipe System" (CN 201310018460.2) uses heat pipes to enhance the heat transfer capacity between the deep soil and the horizontal buried pipes, but this The design only considers the heat transfer in the vertical direction, which has certain limitations.

SUMMARY OF THE INVENTION

Aiming at the problems and deficiencies existing in the existing horizontal buried pipe system, the present invention provides a multi-evaporation section heat pipe coupled ground buried pipe system. The invention combines the multi-evaporation section gravity heat pipe with the horizontal buried pipe, utilizes multiple heat pipe evaporation sections to absorb the heat of the soil in different directions, realizes the heat absorption and transfer of a single heat pipe in multiple directions and a large volume of soil, and solves the problem of horizontal ground. The problem of slow heat transfer between the borehole system and the long distance soil.

In order to realize the above-mentioned purpose of the invention, the technical scheme of the present invention is as follows:

A multi-evaporation section heat pipe coupled ground buried pipe system includes a horizontal buried pipe 5 arranged in the soil 6, a multi-evaporation section gravity heat pipe 1 buried under the horizontal ground buried pipe 5, and the interior of the multi-evaporation section gravity heat pipe 1 Filled with refrigerant, the multi-evaporation section gravity heat pipe 1 includes a plurality of evaporation sections 3 at the bottom, and a common heat pipe condensation section 2 connected to the top of the plurality of evaporation sections. The horizontal buried pipe 5 and the multi-evaporation section gravity heat pipe 1 operate jointly to transfer the heat of the soil 6 to the heat pump system.

As a preferred way, the multi-evaporation section gravity heat pipe 1 is provided with a refrigerant liquid separation head 4, the top of the plurality of heat pipe evaporation sections 3 and the porous joint on the bottom surface of the refrigerant liquid separation head 4 are welded to form a refrigerant channel, and the heat pipe condensation section 2 and the refrigerant separation The header port above the liquid head 4 is welded and forms a condensation channel.

As a preferred manner, the plurality of heat pipe evaporation sections 3 are evenly distributed along the circumferential direction.

As a preferred way, the top of the horizontally buried pipe 5 is 1 m away from the upper surface of the soil 6 .

The working principle of the invention is as follows: the evaporation section of the heat pipe is evenly distributed in the surrounding soil in the form of radiation, and can absorb heat from the soil in different directions. When the system is working, the liquid refrigerant inside the evaporation section of the heat pipe absorbs the heat of the surrounding high-temperature soil and then changes into a gaseous state, and enters the condensation section of the heat pipe after passing through the refrigerant liquid separation head along the pipeline. The gaseous refrigerant in the condensation section releases heat into the surrounding low-temperature soil. At this time, the heat exchange fluid in the horizontal buried pipe continuously absorbs the heat in the heated soil and transfers it to the heat pump system. In this way, the heat is transferred through high temperature soil, heat pipe evaporator, heat pipe condenser, low temperature soil, horizontal buried pipe, heat pump and other components, and the buried pipe completes the absorption of surrounding and multi-directional long-distance soil heat.

Further, the multi-evaporation section gravity heat pipe can flexibly adjust the number of evaporation sections, installation angle, and extension length according to actual needs.

The refrigerant liquid separator is used to connect the evaporation section and the condensation section of the heat pipe respectively, so as to realize the heat absorption of the soil heat in different directions and different depths by the heat pipe, and use the multi-evaporation section heat pipe to couple with the buried pipe to delay and weaken the heat exchange capacity between the horizontal buried pipe and the soil. attenuation.

Compared with the prior art, the beneficial effects of the present invention are as follows:

1. Compared with the existing buried pipe system, the multi-evaporation section heat pipe coupling buried pipe system provided by the present invention can utilize multiple heat pipe evaporation sections to achieve multi-directional and long-distance rapid transfer of soil heat and buried pipes .

2. The design of the evaporation section of the heat pipe can be flexibly adjusted according to the needs to meet the special needs of different environments.

Description of drawings

FIG. 1 is a schematic structural diagram of a multi-evaporation section heat pipe coupling underground pipe system provided by an embodiment of the present invention;

In the figure, 1 is the multi-evaporation section gravity heat pipe, 2 is the condensation section of the heat pipe, 3 is the evaporation section, 4 is the refrigerant liquid separator, 5 is the horizontal buried pipe, and 6 is the soil.

Detailed ways

In order to make the solutions and principles of the present invention clearer to those skilled in the art, the following detailed description is given in conjunction with the accompanying drawings and specific embodiments. The content of the present invention is not limited to any specific embodiment, nor does it represent the best embodiment, and general substitutions known to those skilled in the art are also included within the protection scope of the present invention.

As shown in FIG. 1 , this embodiment provides a multi-evaporation section heat pipe coupled underground pipe system, including a horizontal buried pipe 5 set in the soil 6 and a multi-evaporation section gravity heat pipe buried under the horizontal buried pipe 5 1. The multi-evaporation section gravity heat pipe 1 is filled with refrigerant. The multi-evaporation section gravity heat pipe 1 includes a plurality of evaporation sections 3 at the bottom, and the top of the plurality of evaporation sections is connected to a common heat pipe condensation section 2. The horizontal buried pipe 5 and the multi-evaporation section gravity heat pipe 1 operate jointly to transfer the heat of the soil 6 to the heat pump system.

The multi-evaporation section gravity heat pipe 1 is provided with a refrigerant liquid separation head 4, the top of the plurality of heat pipe evaporation sections 3 is welded with the porous joint on the bottom surface of the refrigerant liquid separation head 4 to form a refrigerant channel, and the heat pipe condensation section 2 is above the refrigerant liquid separation head 4. The header ports are welded and form condensation channels.

The plurality of heat pipe evaporation sections 3 are evenly distributed along the circumferential direction.

The top of the horizontal buried pipe 5 is 1 m away from the upper surface of the soil 6 .

The evaporation section of the heat pipe is evenly distributed in the surrounding soil in the form of radiation, which can absorb the heat from the soil in different directions. When the system is working, the liquid refrigerant inside the evaporation section of the heat pipe absorbs the heat of the surrounding high-temperature soil and then changes into a gaseous state, and enters the condensation section of the heat pipe after passing through the liquid separation head along the pipeline. The gaseous refrigerant in the condensation section releases heat into the surrounding low-temperature soil. At this time, the heat exchange fluid in the horizontal buried pipe continuously absorbs the heat in the heated soil and transfers it to the heat pump system. In this way, the heat is transferred through the high temperature soil, heat pipe evaporator, heat pipe condenser, low temperature soil, horizontal buried pipe and heat pump, and the buried pipe completes the absorption of surrounding and multi-directional long-distance soil heat.

The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative rather than restrictive. Under the inspiration of the present invention, many modifications can be made without departing from the spirit of the present invention and the protection scope of the claims, which all belong to the protection of the present invention.

Claims (4)

1. The utility model provides a many evaporation zone heat pipe coupling ground pipe laying system which characterized in that: the multi-evaporation-section gravity type heat pipe comprises a horizontal buried pipe (5) arranged in soil (6) and a multi-evaporation-section gravity type heat pipe (1) buried below the horizontal buried pipe (5), wherein a refrigerant is filled in the multi-evaporation-section gravity type heat pipe (1), and the multi-evaporation-section gravity type heat pipe (1) comprises a plurality of evaporation sections (3) at the bottom and a plurality of evaporation sections, and the tops of the evaporation sections are connected with a common heat pipe condensation section (2).

2. The multiple evaporator end heat pipe coupled buried pipe system of claim 1, wherein: the multi-evaporation-section gravity type heat pipe (1) is provided with a refrigerant liquid separation head (4), the tops of a plurality of heat pipe evaporation sections (3) are welded with a porous joint on the bottom surface of the refrigerant liquid separation head (4) to form a refrigerant channel, and the heat pipe condensation section (2) is welded with a header port on the refrigerant liquid separation head (4) to form a condensation channel.

3. The multiple evaporator end heat pipe coupled buried pipe system of claim 1, wherein: the plurality of heat pipe evaporation sections (3) are uniformly distributed along the circumferential direction.

4. The multiple evaporator end heat pipe coupled buried pipe system of claim 1, wherein: the top end of the horizontal buried pipe (5) is 1m away from the upper surface of the soil (6).

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