CN217357601U

CN217357601U - Horizontal temperature control solar heat pipe

Info

Publication number: CN217357601U
Application number: CN202220423980.6U
Authority: CN
Inventors: 谢龙; 李雷涛; 赵洁莲; 李晓娟; 牛雷
Original assignee: Shandong Geentropy Thermal Energy Technology Co ltd
Current assignee: Shandong Geentropy Thermal Energy Technology Co ltd
Priority date: 2022-03-01
Filing date: 2022-03-01
Publication date: 2022-09-02
Anticipated expiration: 2032-03-01

Abstract

The utility model provides a horizontal accuse temperature solar heat pipe, including condenser head and heat pipe section, different yield strength's aluminum alloy is selected according to the different operating temperature of working medium to condenser head and heat pipe section, processing has the liquid passageway in the heat pipe section, vapour passageway and channel, wherein liquid passageway and vapour passageway are linked together through the channel, liquid working medium in the liquid passageway vaporizes and gets into vapour passageway behind the solar energy radiation, vapour state working medium rises to the condenser head back liquefaction, liquid working medium gets into liquid passageway again through the capillary force of channel, the inner wall processing of condenser head has the cusp fin, select appropriate working medium according to using the operating mode in heat pipe section and the condenser head, the working medium charge volume of confirming the heat pipe according to the relevant parameter under the heat pipe failure temperature of setting for realizes controlling the temperature. Wherein the utility model has the advantages that: the quality of the heat pipe is effectively reduced, the manufacturing cost is reduced, the dependence of the traditional heat pipe on gravity is overcome, and the temperature control precision of the heat pipe is improved.

Description

Horizontal temperature control solar heat pipe

Technical Field

The utility model relates to a solar photothermal utilization technical field, in particular to horizontal accuse temperature solar energy heat pipe.

Background

The utilization of renewable energy is a major measure for mankind to cope with the energy crisis. Solar energy is widely used as a renewable clean energy source in the field of water heaters. Solar heat collectors commonly used in the market mainly comprise flat plate heat collectors, full-glass vacuum tube heat collectors, U-shaped tube heat collectors and heat pipe heat collectors. Compared with other heat collectors, the solar heat pipe heat collector has the characteristics of high heat efficiency, strong frost resistance, rapid temperature rise, low heat loss and the like, so that the solar heat pipe heat collector is widely concerned.

The conventional gravity assisted heat pipe has a limitation in installation due to its dependence on gravity, for example, when combined with a building, most of the gravity assisted heat pipes can be installed on a roof only with an inclination angle. The existing gravity heat pipe used in the solar heat pipe collector is mostly made of copper, and the working medium of the heat pipe is water. When the solar radiation intensity is high in summer, the excessive heat in the heat collection system can cause high temperature problems such as pressure relief of a safety valve, high-temperature aging of equipment, heat transfer capacity loss caused by carbonization of an antifreeze and the like. The high processing cost and the complex temperature control mode of the solar heat pipe collector become main obstacles for popularizing the heat pipe collector in China.

Patent CN105865239A discloses an automatic temperature-sensing blocking type overheat-proof heat pipe, in which an automatic blocking device is disposed in a position close to an evaporation section in a condensation section, for dealing with the problem of system overheat of a solar water heater system under the condition of high temperature. Although the temperature can be effectively controlled, the internal structure of the heat pipe is complex and the processing is difficult. Patent CN209512310U discloses a horizontal heat pipe heat collector of inclination, has designed the structure of inclination for realizing the horizontal installation of heat collector, and the external fixed 2 metal clamping pieces that cup joint in the outside of solar heat pipe, metal clamping piece and vacuum tube inner wall fixed connection. Because an included angle exists between the vacuum tube and the heat tube, the diameter of the vacuum tube is large, and the whole area of the equipment is increased.

The application of the current solar heat pipe has several problems to be solved: 1) when the illumination intensity is high, the service life of the heat collector is greatly reduced due to the overhigh temperature of the solar heat pipe; 2) the traditional copper-water heat pipe has high production cost; 3) the installation mode with a certain inclination angle is usually adopted, and a certain installation space is required.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses a can overheated automatic shutdown, heat transfer efficiency is high, low in production cost, installation space require low, simple structure's horizontal accuse temperature solar heat pipe, the technical scheme of the utility model is implemented like this:

a horizontal temperature control solar heat pipe comprises a condensation head and a heat pipe section, wherein the heat pipe section comprises a steam channel, a liquid channel and a channel, the steam channel is communicated with the liquid channel through the channel, the condensation head is connected with the heat pipe section, a toothed fin is processed on the inner wall of the condensation head, and the materials of the condensation head and the heat pipe section are selected from aluminum alloys; further comprising a working fluid selected from any one of the working fluids including but not limited to heptafluoropropane, ethyl fluoride, trifluoromethyl methyl ether or methyl chloride, wherein the channel provides capillary force for the working fluid so as to overcome the dependence on gravity.

Preferably, the condenser head and the heat pipe section are made of aluminum alloys with different yield strengths.

Preferably, the material of the condensation head comprises 6063 aluminum alloy.

Preferably, the material of the heat pipe section comprises 5 series aluminum alloy, 7 series aluminum alloy or aluminum-rhenium alloy.

Preferably, the condenser head comprises a head sealing section, a condenser section and a connecting section, the condenser section connecting the head sealing section and the connecting section.

Preferably, the connecting section is connected with the heat pipe section.

By implementing the technical scheme of the utility model, the technical problems that the installation space of the solar heat pipe is large, the cost of the copper-water heat pipe is high, and the illumination intensity is high, so that the service life of the device is shortened in the prior art can be solved; implement the technical scheme of the utility model, through dividing into condenser head and hot pipe section two parts with solar heat pipe, different aluminum alloys are selected according to the operating mode to condenser head and hot pipe section, processing vapour passageway, liquid passageway and channel in the hot pipe section, and condenser head inner wall processing cusp fin, solar heat pipe are annotated and are had working medium, can select suitable working medium according to solar heat pipe's use operating mode, calculate solar heat pipe's working medium charge, and realizable technological effect includes:

1. the aluminum is adopted to replace copper, so that the weight of the solar heat pipe can be greatly reduced, and the cost is effectively reduced;

2. the working medium with high phase change latent heat is adopted, so that the heat transfer efficiency is greatly improved;

3. capillary force generated by processing a channel in the heat pipe can overcome the dependence of the traditional gravity heat pipe on gravity, and horizontal installation is realized;

4. the temperature control effect is realized through accurate charging amount, and the structure is simple;

5. the work is automatically stopped due to overheating, the service life of the heat pipe is long, and the effective life is longer than 15 years.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only one embodiment of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

FIG. 1 is a schematic view of a horizontal temperature-controlled solar heat pipe;

FIG. 2 is a schematic view of a condenser head;

FIG. 3 is a front cross-sectional view of a condenser head;

FIG. 4 is a right side cross-sectional view of the condenser head;

FIG. 5 is a right side cross-sectional view of a heat pipe section.

In the above drawings, the reference numerals denote:

1 condensation head

1-1 seal segment

1-2 condensation section

1-3 connection segment

1-4 tooth-shaped fin

2 Heat pipe section

2-1 steam channel

2-2 liquid channel

2-3 channel

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Examples

In a preferred embodiment, as shown in fig. 1, a horizontal temperature control solar heat pipe includes a condensation head 1 and a heat pipe section 2, the condensation head 1 is connected to the heat pipe section 2, the condensation head 1 and the heat pipe section 2 select aluminum alloys with different yield strengths according to different working temperatures of internal working mediums, the temperature of the working medium in the condensation head 1 is low, and an aluminum alloy with low yield strength, such as 6063 aluminum alloy, can be selected. The temperature of the working medium in the heat pipe section 2 is high, and an aluminum alloy material with high yield strength can be selected, for example, 5 series aluminum alloy such as 5083 and 5A 02; 7-series aluminum alloys such as 7075, 7A04 or aluminum rhenium alloys.

The condenser head 1 includes a head sealing section 1-1, a condenser section 1-2, and a connection section 1-3, as shown in fig. 2 and 3, the condenser section 1-2 connects the head sealing section 1-1 and the connection section 1-3, wherein the connection section 1-3 is connected to the heat pipe section 2. The inner wall of the condensation head 1 is provided with toothed fins 1-4, as shown in fig. 4, the toothed fins 1-4 can increase the condensation heat exchange area of the working medium, and improve the condensation heat exchange effect. The heat pipe section 2 comprises a vapor passage 2-1, a liquid passage 2-2 and a channel 2-3, and as shown in fig. 5, the vapor passage 2-1 and the liquid passage 2-2 are communicated through the channel 2-3.

The solar heat pipe is filled with working media, the working media with large phase change latent heat, small kinematic viscosity, high heat conductivity coefficient, large liquid phase density and supercritical temperature of 100-200 ℃ are selected, and the working media can be selected from any one of heptafluoropropane, ethyl fluoride, trifluoromethyl methyl ether or methyl chloride. In order to ensure the temperature control precision of the solar heat pipe, the charge amount of the working medium needs to be calculated, wherein the charge amount of the working medium is obtained by related parameters at a set failure temperature, and the specific calculation method comprises the following steps: setting the failure temperature of the solar heat pipe to be 85 ℃, instantly reducing the liquid working medium at the temperature, stopping heat transfer when the heat pipe reaches the dry-up limit, and calculating the filling amount of the solar heat pipe according to the working medium in the heat pipe in a gas state.

The liquid working medium is evaporated to form a gaseous working medium after absorbing solar radiation heat in the liquid channel 2-2 of the heat pipe section 2, the gaseous working medium enters the condensing head 1 along the steam channel 2-1 of the heat pipe section 2, the gaseous working medium in the condensing head 1 is liquefied after being cooled outside to form the liquid working medium, and the liquid working medium reenters the liquid channel 2-2 under the action of capillary force of the channel 2-3 to form a closed two-phase flow loop. The channels 2-3 provide capillary force for the working medium, so that dependence on gravity is overcome, and horizontal installation of the solar heat pipe can be realized. The heat transfer efficiency is greatly improved by utilizing the phase change latent heat of gas-liquid two-phase conversion of the working medium, and the capillary force provided by the channels 2-3 overcomes the problem that the existing solar heat pipe needs to operate depending on gravity.

It should be understood that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and that any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A horizontal temperature control solar heat pipe is characterized in that: the heat pipe comprises a condensation head and a heat pipe section, wherein the heat pipe section comprises a steam channel, a liquid channel and a channel, the steam channel is communicated with the liquid channel through the channel, the condensation head is connected with the heat pipe section, a tooth-shaped fin is machined on the inner wall of the condensation head, and the condensation head and the heat pipe section are both made of aluminum alloy; the capillary channel also comprises a working medium, wherein the working medium is selected from any one of heptafluoropropane, ethyl fluoride, trifluoromethyl methyl ether or methyl chloride, and the channel provides capillary force for the working medium.

2. The horizontal temperature-control solar heat pipe according to claim 1, wherein: the condensing head and the heat pipe section are made of aluminum alloys with different yield strengths.

3. The horizontal temperature-control solar heat pipe according to claim 2, wherein: the material of the condensation head comprises 6063 aluminum alloy.

4. The horizontal temperature-control solar heat pipe according to claim 3, wherein: the heat pipe section is made of 5 series aluminum alloy, 7 series aluminum alloy or aluminum-rhenium alloy.

5. The horizontal temperature-control solar heat pipe according to claim 4, wherein: the condensation head comprises a head sealing section, a condensation section and a connecting section, and the condensation section is connected with the head sealing section and the connecting section.

6. The horizontal temperature-control solar heat pipe according to claim 5, wherein: the connection section is connected with the heat pipe section.