CN202149624U

CN202149624U - Solar heat collector

Info

Publication number: CN202149624U
Application number: CN201120247878U
Authority: CN
Inventors: 朱雷
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-14
Filing date: 2011-07-14
Publication date: 2012-02-22
Anticipated expiration: 2021-07-14

Abstract

The utility model relates to a solar heat collector, which comprises a heat exchange tube driven by a solar tracker and a condensing mirror. The heat exchange tube consists of an inner metal tube and an outer metal tube. The inner metal tube is wrapped in the outer metal tube. Both ends of the outer metal tube are sealed by an insulating end cap to form a vacuum darkroom cavity. Both ends of the inner metal tube extend outside the outer metal tube by the insulating end cap. The inner metal tube is a heat absorbing layer and contains flowing heat exchange media. The cross section of the condensing mirror is a curved surface and the heat exchange tube is placed on a condensing axial line on the curved surface of the condensing mirror. The outer metal layer facing the condensing mirror is provided with a light incident window which is provided with an integrally fixed support frame. Transparent glass is inlayed hermetically in the support frame and a reflecting film covers the metal inner wall of the outer metal tube.

Description

Solar thermal collector

Technical field

The utility model relates to a kind of solar thermal collector.

Background technology

Solar energy is a kind of high efficient energy sources, and can not cause environmental pollution, and along with development of science and technology, the application of solar energy is more and more wider.

In many Application of Solar Energy field, solar thermal collector has focusing solar thermal collector than early being used by people, and the endothermic solar heat collector is also arranged, and uses more extensive with the endothermic solar heat collector especially.

In the endothermic solar heat collector, having a kind of is to adopt efficient endothermic tube, is the glass blind pipe suit by two different diameters, and beginning end flame burns and melts sealing-in and vacuumize and process.This heating tube, its glass tube that adopts transportation, install and the process used in very easily damage, and when installing owing to have the gap between pipe, the unit are heat absorption efficiency is descended.Also having a kind of is traditional flat-plate collector, and it mainly is the heat that absorbs the sun through the thermal-arrest plate, directly transmits one group of water pipe, makes the liquid in the water pipe obtain heat.This solar heat permutoid, though structure is simple, a large amount of heat energy that absorb scatter and disappear through light penetrating panel again, so efficient is not high.

No matter be which kind of heat collector, its solar heat permutoid all is to be exposed in the natural environment, in the convection current of air, in the conduction, tends to lose a part of part heat, influences solar energy utilization rate.

How to improve solar energy utilization rate, be the long-term problem of paying close attention in this area always.Know that according to the applicant in solar thermal collector, heat-exchange tube is contained inside and outside bimetal pipe, the ectonexine metal tube is chamber, vacuum darkroom, does not appear in the newspapers at present.

Summary of the invention

The purpose of the utility model is: the processing cost that exists to present solar heat permutoid, or the thermal efficiency is not high, or volume is excessive, or a series of problems such as composite assembly difficulty in using provide a kind of new solar thermal collector.

The purpose of the utility model is achieved in that a kind of solar thermal collector, it is characterized in that, solar collector comprises heat-exchange tube and the condenser mirror that solar tracking device drives, wherein:

A) heat-exchange tube is made up of inner layer metal pipe and outer layer metal tube; The inner layer metal pipe is wrapped in the outer layer metal tube; The outer layer metal tube two ends form chamber, vacuum darkroom by heat insulation end cap seal; Outer layer metal tube is stretched out by heat insulation end cap in the two ends of inner layer metal pipe, and the inner layer metal pipe is outward a heat-sink shell, and mobile heat exchange medium is arranged in the inner layer metal pipe;

B) cross section of condenser mirror is a curved surface; Heat-exchange tube places on the focusing axis of condenser mirror mean camber; Outer layer metal tube towards condenser mirror is provided with the light entrance window; The light entrance window is furnished with the support frame that is solidified as a whole, and sealing is installed with transparent glass in the described support frame;

C) be covered with reflectance coating on the metal inner surface of outer layer metal tube.

In the utility model, heat-exchange tube ectomesoderm metal tube diameter is 10 ~ 1000mm.

In the utility model, comprise an inner layer metal pipe in the heat-exchange tube at least, outer layer metal tube is all stretched out at the two ends of each inner layer metal pipe, or outer layer metal tube is stretched out by a metal tube respectively after converging in the two ends of each inner layer metal pipe.

In the utility model, described vacuum darkroom is placed with getter in the chamber.

In the utility model, the vacuum in chamber, described vacuum darkroom is 1.33 * 10 ^-1~ 1.33 * 10 ^-5Pa.

The advantage of the utility model is: because heat-exchange tube is by inner layer metal pipe and outer layer metal tube; The inner layer metal pipe is wrapped in the outer layer metal tube; The outer layer metal tube two ends form chamber, vacuum darkroom by heat insulation end cap seal, and outer layer metal tube is stretched out by heat insulation end cap in the two ends of inner layer metal pipe, and the cross section of condenser mirror is a curved surface; Heat-exchange tube places on the focusing axis of condenser mirror mean camber; Outer layer metal tube towards condenser mirror is provided with the light entrance window, and the light entrance window is furnished with the framework that is solidified as a whole, and sealing is installed with transparent glass in the described framework; The energy that gets in the outer layer metal tube can only focus on the back from light entrance window entering chamber, vacuum darkroom by condenser mirror, carries out heat exchange through inner layer metal pipe and the heat exchange medium that flows; Owing to be covered with reflectance coating on the metal inner surface of outer layer metal tube; The infrared ray that obtains the inner layer metal pipe emission of heat projects behind the outer layer metal inside pipe wall again can bounce back inner layer metal pipe, reduces the loss to the outer layer metal tube radiation of heat that the inner layer metal pipe obtained; Owing to be placed with getter in the chamber, vacuum darkroom, can keep the vacuum in the chamber, reduce the heat conduction and the convection current that form between the ectonexine metal tube; Heat-exchange tube places on the focusing axis of condenser mirror mean camber, can guarantee that heat-exchange tube is put can obtain more solar energy; Be furnished with the support frame that is solidified as a whole on the light entrance window, possibility be provided for sealing is installed with transparent glass.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the structural representation of the embodiment of heat-exchange tube in the utility model;

Fig. 3 is that the A-A of Fig. 2 is to the sectional structure sketch map.

Among the figure, 1, outer layer metal tube, 2, the inner layer metal pipe, 3, heat insulation end cap, 4, the light entrance window, 5, support frame, 6, reflectance coating, 7, heat-sink shell, 8, chamber, vacuum darkroom, 9, condenser mirror.

The specific embodiment

Accompanying drawing without limitation 3 the utility model embodiment disclosed concrete structure, below in conjunction with accompanying drawing the utility model is done further to describe.

Visible by Fig. 1; Solar collector comprises heat-exchange tube and the condenser mirror 9 that solar tracking device drives, and wherein, heat-exchange tube is made up of inner layer metal pipe 2 and outer layer metal tube 1; The cross section of condenser mirror 9 is a curved surface, and heat-exchange tube places on the focusing axis of condenser mirror 9 mean cambers.

Visible by Fig. 2 Fig. 3, the inner layer metal pipe 2 of heat-exchange tube is wrapped in the outer layer metal tube 1, and outer layer metal tube 1 two ends form chamber, vacuum darkroom 8 by heat insulation end cap 3 sealings, are covered with reflectance coating 6 on the metal inner surface of outer layer metal tube 1; Outer layer metal tube 1 is stretched out by heat insulation end cap 3 in the two ends of inner layer metal pipe 2, is heat-sink shell 7 outside the inner layer metal pipe 2, and mobile heat exchange medium is arranged in the inner layer metal pipe 2.Outer layer metal tube 1 towards condenser mirror 9 is provided with light entrance window 4, and light entrance window 4 is furnished with the support frame 5 that is solidified as a whole, and sealing is installed with transparent glass in the described support frame 5.

During practical implementation, the diameter of heat-exchange tube ectomesoderm metal tube 1 can be 10 ~ 1000mm.At least comprise an inner layer metal pipe 2 in the heat-exchange tube, outer layer metal tube 1 is all stretched out at the two ends of each inner layer metal pipe 2, or outer layer metal tube 1 is stretched out by a metal tube respectively after converging in the two ends of each inner layer metal pipe 2.

During practical implementation, can also be placed with getter in the chamber, vacuum darkroom 8.The vacuum in chamber, vacuum darkroom 8 can be 1.33 * 10 ^-1~ 1.33 * 10 ^-5Pa.

The course of work of the utility model is: after the utility model is assembled into integral body; Solar tracking device by mature technology drives; Follow sun operation and change operating angle; The curved surface that guarantees condenser mirror 9 is over against the sun, thereby assurance sunray reflect focalization point is getting into chambeies, vacuum darkroom 8 by the light entrance window below the heat-exchange tube 4, and is passed to heat exchange medium after 2 absorptions of inner layer metal pipe.The heat in radiation entering chamber, vacuum darkroom 8 can make the heat-sink shell 7 temperature rising (more than temperature rise to 450 degree) of inner layer metal pipe 2; With inner layer metal pipe 2 in heat exchange medium exchange in; Also can be to a large amount of infrared rays of external radiation; Infrared ray projects the heat-sink shell 7 that is reflected back toward inner layer metal pipe 2 behind the reflectance coating 6 of outer layer metal tube 1 inwall again, is absorbed by heat-sink shell 7 again, has only a small amount of infrared ray possibly pass through the glass of light entrance window 4; After even a small amount of infrared ray passes through the glass of light entrance window 4; Again can be by condenser mirror 9 chamber, reflected back vacuum darkroom 8 again, and being the heat collector infrared heat radiation of glass, will directly scatter and disappear by existing outer tube, the infrared heat radiation loss possibly reach more than the 10%--15% during high temperature.Because the utility model has solved the loss that traditional heat collector causes because of heat radiation preferably, and can avoid conduction, convection current in the chamber, vacuum darkroom 8, the solar thermal utilization rate of the utility model is very high.

Claims

1. a solar thermal collector is characterized in that, solar collector comprises heat-exchange tube and the condenser mirror that solar tracking device drives, wherein:

2. solar thermal collector according to claim 1 is characterized in that, heat-exchange tube ectomesoderm metal tube diameter is 10 ~ 1000mm.

3. solar thermal collector according to claim 2; It is characterized in that; At least comprise an inner layer metal pipe in the heat-exchange tube, outer layer metal tube is all stretched out at the two ends of each inner layer metal pipe, or outer layer metal tube is stretched out by a metal tube respectively after converging in the two ends of each inner layer metal pipe.

4. according to the described solar thermal collector of one of claim 1 ~ 3, it is characterized in that described vacuum darkroom is placed with getter in the chamber.

5. solar thermal collector according to claim 4 is characterized in that, the vacuum in chamber, described vacuum darkroom is 1.33 * 10 ^-1~ 1.33 * 10 ^-5Pa.