Solar heat pipe vacuum pipe and solar heat collector composed of same

Abstract

The utility model discloses a solar heat pipe vacuum tube and a solar heat collector composed of the solar heat pipe vacuum tube, a heat pipe comprises an evaporation section and a condensation section which are integrally formed, and the evaporation section and the condensation section are connected through a 90-degree bent angle arc; the heat collecting pipe is an all-glass vacuum pipe, and a heat insulation cover is arranged at the top opening end; the bottom end of the evaporation section penetrates through the heat insulation cover and enters the heat collection pipe. The heat transfer aluminum fins are arranged in the heat collection pipe, located on the outer side of the evaporation section and used for conducting heat transfer. The multiple parallel solar heat pipe vacuum pipes and the metal collecting pipe are fixedly connected through the heat transfer fixing assembly and conduct heat, the non-tracking light gathering plate is further arranged, the number of the heat pipe vacuum pipes in unit area is reduced, corresponding heat transfer parts are designed, heat resistance is reduced, cost is reduced, and field installation is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of solar energy utilization, in particular to a solar heat pipe vacuum tube and a solar heat collector composed of the same. Background Art

[0002] The evaporation section and condensation end of the existing solar heat pipe vacuum tube are copper tubes. The condensation end extends straight out of one end of the vacuum tube. The diameter of the condensation end must be larger than the evaporation tube and cross-connected with the copper header of the solar collector. The heat transfer contact surface is small, the structure is complex, and the cost is high. There is no condenser on the back of the heat pipe vacuum tube. The vacuum tubes must be densely arranged to reduce light leakage between the tubes. More heat pipe vacuum tubes are required per square meter of lighting area, which is costly. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a solar heat pipe vacuum tube and a solar collector composed of the same.

[0004] The utility model provides a solar heat pipe vacuum tube, comprising a heat pipe, a heat collecting tube and heat transfer aluminum fins; wherein:

[0005] The heat pipe comprises an evaporation section and a condensation section which are integrally formed, and the evaporation section and the condensation section are connected in an arc shape with a 90° bend angle;

[0006] The heat collecting tube is configured as a full glass vacuum tube, and a heat insulating cover is provided at the top open end thereof; the bottom end of the evaporation section passes through the heat insulating cover and enters the interior of the heat collecting tube;

[0007] The heat transfer aluminum fins are arranged inside the heat collecting tube and outside the evaporation section for heat transfer.

[0008] Preferably, the heat pipe is configured as an all-aluminum tube, and the working fluid filled in the heat pipe is n-pentane or acetone.

[0009] Preferably, the evaporation section and the condensation section are set to have the same diameter, and the length of the condensation section is set to 1 / 20 to 1 / 15 of the length of the evaporation section.

[0010] Preferably, the heat transfer aluminum fins are arranged as heat transfer cylinders, and the heat transfer cylinders are made of aluminum thin plates; the heat transfer cylinders are arranged in close contact with the inner wall of the inner glass tube of the heat collecting tube and the outer wall of the evaporating section, so as to perform heat transfer from the inner glass tube of the heat collecting tube to the evaporating section.

[0011] A solar collector composed of solar heat pipe vacuum tubes comprises a plurality of said solar heat pipe vacuum tubes, a metal header, a heat transfer fixing assembly and a non-tracking concentrator; wherein the plurality of said solar heat pipe vacuum tubes are arranged side by side, the metal header is arranged in parallel on the top surfaces of the plurality of said condensing sections and is arranged in contact with the top surfaces of the said condensing sections; the said condensing sections are connected and fixed to the metal header through the heat transfer fixing assembly and transfer heat; the said non-tracking concentrator is fixedly arranged on the back sides of the plurality of said solar heat pipe vacuum tubes.

[0012] Preferably, the heat transfer fixing assembly includes two aluminum double semicircular arc heat conducting plates, the two semicircular arcs of the double semicircular arc heat conducting plates respectively match the outer diameters of the condensing section and the metal collecting pipe, and the condensing section and the metal collecting pipe are clamped and fixed between the two double semicircular arc heat conducting plates by four bolts to achieve dry contact heat transfer.

[0013] Preferably, the metal header is made of galvanized steel pipe.

[0014] Preferably, the width of the double semicircular arc heat conducting plate is not less than the straight section length of the condensing section, and the thickness is set to 2 to 3 mm.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model provides a solar heat pipe vacuum tube, in which the condensing section and the evaporating section are arranged as full aluminum heat pipes with the same diameter, replacing full copper heat pipes with different diameters in the condensing section and the evaporating section, thereby reducing the cost;

[0017] The solar collector composed of solar heat pipe vacuum tubes is equipped with a non-tracking concentrator, which reduces the number of heat pipe vacuum tubes required per square meter of heat collection area. The existing heat pipe vacuum tube solar collector condensing section and header cross connection heat transfer is improved to a 90-degree bend of the condensing section and a parallel contact connection with the metal header. The header can be a galvanized steel pipe, which replaces the high-cost copper header in the prior art. The corresponding heat transfer components are designed to reduce thermal resistance, reduce costs, and are easy to install on site.

[0018] It should be understood that the contents described in the summary of the utility model are not intended to limit the key or important features of the embodiments of the utility model, nor are they intended to limit the scope of the utility model.

[0019] Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 It is a schematic diagram of the structure of a solar heat pipe vacuum tube from the front view;

[0022] Figure 2 A cross-sectional view of a solar heat pipe vacuum tube viewed from above;

[0023] Figure 3 It is a schematic diagram of the structure of a solar thermal collector from the front view;

[0024] Figure 4 It is a cross-sectional view after the condensing section is assembled with the metal header and the heat transfer fixing components;

[0025] Figure 5 A schematic diagram of the assembly of a solar thermal vacuum tube and a non-tracking concentrator panel;

[0026] Numbers in the figure: 1, solar collector; 11, heat pipe vacuum tube; 111, heat pipe; 112, collector tube; 113, heat transfer aluminum fins; 114, evaporation section; 115, condensation section; 116, insulation cover; 12, metal collector; 13, heat transfer fixing assembly; 131, double semicircular arc heat conduction plate; 132, bolt; 14, non-tracking concentrator. DETAILED DESCRIPTION

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings.

[0028] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] Please refer to Figures 1 to 5 The embodiment of the utility model provides a solar heat pipe vacuum tube 11, comprising a heat pipe 111, a heat collecting tube 112 and a heat transfer aluminum fin 113; wherein,

[0030] The heat pipe 111 includes an evaporation section 114 and a condensation section 115 which are integrally formed. The evaporation section 114 and the condensation section 115 are connected in an arc shape by a 90° bend. The heat pipe 111 is an all-aluminum pipe, and the working fluid filled in the heat pipe 111 is n-pentane or acetone.

[0031] In a preferred embodiment, the evaporation section 114 and the condensation section 115 are set to have the same diameter, and the length of the condensation section 115 is set to 1 / 20 to 1 / 15 of the length of the evaporation section 114 .

[0032] The heat collecting tube 112 is configured as a full glass vacuum tube, and a heat insulating cover 116 is provided at the top open end thereof; the bottom end of the evaporation section 114 passes through the heat insulating cover 116 and enters the interior of the heat collecting tube 112;

[0033] The heat transfer aluminum fins 113 are arranged inside the heat collecting tube 112 and outside the evaporation section 114 , and are used for heat transfer between the inner glass tube of the heat collecting tube 112 and the evaporation section 114 .

[0034] In a preferred embodiment, the heat transfer aluminum fins 113 are arranged in the form of a heat transfer cylinder, and the heat transfer cylinder is made of an aluminum sheet; the heat transfer cylinder is arranged in close contact with the inner wall of the inner glass tube of the heat collecting tube 112 and the outer wall of the evaporation section 114, which is a dry contact heat transfer, and is used to perform the heat transfer from the inner glass tube of the heat collecting tube 112 to the evaporation section 114.

[0035] A solar collector 1 composed of solar heat pipe vacuum tubes includes multiple solar heat pipe vacuum tubes 11, metal headers 12, heat transfer fixing components 13 and non-tracking concentrators 14; wherein the multiple solar heat pipe vacuum tubes 11 are arranged side by side, the metal headers 12 are arranged in parallel on the top surfaces of multiple condensing sections 115, and are arranged in contact with the top surfaces of the condensing sections 115, which is a dry contact heat transfer; the condensing sections 115 are connected and fixed to the metal headers 12 through the heat transfer fixing components 13 and transfer heat; the non-tracking concentrators 14 are fixed on the back sides of the multiple solar heat pipe vacuum tubes 11 by means of brackets or the like.

[0036] In a preferred embodiment, the heat transfer fixing assembly 13 includes two aluminum double semicircular arc heat conductive plates 131, and the two semicircular arcs of the double semicircular arc heat conductive plates 131 respectively match the outer diameters of the condensing section 115 and the metal manifold 12. The two double semicircular arc heat conductive plates 131 are clamped and fixed with four bolts 132 to achieve dry contact heat transfer.

[0037] In a preferred embodiment, the metal manifold 12 is made of galvanized steel pipes, and the flowing medium in the pipes transmits the solar heat energy collected by each heat pipe vacuum tube 11.

[0038] In a preferred embodiment, the width of the double semicircular arc heat conducting plate 131 is not less than the straight length of the condensing section 115, and the thickness is set to 2 to 3 mm.

[0039] A solar collector 1 is composed of a plurality of the above-mentioned heat pipe vacuum tubes 11 arranged side by side. A non-tracking concentrator 14 is arranged on the back of the heat pipe vacuum tube 11 to increase the tube spacing of the heat pipe vacuum tube 11 so as to reduce the number of heat pipe vacuum tubes 11 required for each square meter of lighting area. The condensing section 115 of each heat pipe vacuum tube 11 is in dry contact with the same metal header 12 for heat transfer. The condensing section 115 of the heat pipe 111 is in parallel contact with the metal header 12. A heat transfer fixing component 13 is arranged between the two. The heat transfer fixing component 13 is two aluminum double semicircular arc heat conducting plates 131. The outer diameters of the double semicircular arc heat conducting plates 131 and the condensing section 115 tubes and the outer diameter of the metal header 12 are consistent. The half (i.e., two double semicircular arc heat conducting plates 131) wrap the condensing section 115 tubes and the metal header 12, and then are clamped with four bolts 132 to achieve good dry contact heat transfer.

[0040] In the description of this specification, the terms "connection", "installation", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In the description of this specification, the description of the terms "one embodiment", "some embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0042] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A solar heat pipe vacuum tube, characterized in that: It includes heat pipes, heat collecting tubes and heat transfer aluminum fins; among which, The heat pipe comprises an evaporation section and a condensation section which are integrally formed, and the evaporation section and the condensation section are connected in an arc shape with a 90° bend angle; The heat collecting tube is configured as a full glass vacuum tube, and a heat insulating cover is provided at the top open end thereof; the bottom end of the evaporation section passes through the heat insulating cover and enters the interior of the heat collecting tube; The heat transfer aluminum fins are arranged inside the heat collecting tube and outside the evaporation section for heat transfer.

2. The solar heat pipe vacuum tube according to claim 1, characterized in that: The heat pipe is configured as an all-aluminum pipe, and the working fluid filled in the heat pipe is n-pentane or acetone.

3. The solar thermal tube vacuum tube according to claim 1, characterized in that: The evaporation section and the condensation section are set to have the same diameter, and the length of the condensation section is set to 1 / 20 to 1 / 15 of the length of the evaporation section.

4. The solar thermal tube vacuum tube according to claim 1, characterized in that: The heat transfer aluminum fins are arranged as heat transfer cylinders, which are made of aluminum thin plates; the heat transfer cylinders are arranged in close contact with the inner wall of the inner glass tube of the heat collecting tube and the outer wall of the evaporation section, and are used to transfer heat from the inner glass tube of the heat collecting tube to the evaporation section.

5. A solar collector composed of solar heat pipe vacuum tubes, characterized in that: It comprises a plurality of said solar heat pipe vacuum tubes, a metal manifold, a heat transfer fixing component and a non-tracking concentrator; said solar heat pipe vacuum tube is a solar heat pipe vacuum tube as described in any one of claims 1 to 4; wherein, said plurality of said solar heat pipe vacuum tubes are arranged side by side, said metal manifold is arranged in parallel on the top surfaces of a plurality of condensing sections and is arranged in contact with the top surfaces of the condensing sections; said condensing sections are connected and fixed to said metal manifold through said heat transfer fixing component and transfer heat; said non-tracking concentrator is fixedly arranged on the back sides of said plurality of said solar heat pipe vacuum tubes.

6. The solar collector composed of solar heat pipe vacuum tubes according to claim 5, characterized in that: The heat transfer fixing assembly includes two aluminum double semicircular arc heat conducting plates, the two semicircular arcs of the double semicircular arc heat conducting plates respectively match the outer diameters of the condensing section and the metal collecting pipe, and the condensing section and the metal collecting pipe are clamped and fixed between the two double semicircular arc heat conducting plates by four bolts to achieve dry contact heat transfer.

7. The solar collector composed of solar heat pipe vacuum tubes according to claim 5, characterized in that: The metal header is made of galvanized steel pipe.

8. The solar collector composed of solar heat pipe vacuum tubes according to claim 6, characterized in that: The width of the double semicircular arc heat conducting plate is not less than the straight length of the condensing section, and the thickness is set to 2-3 mm.

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