CN2235590Y

CN2235590Y - High efficiency solar energy heat collector

Info

Publication number: CN2235590Y
Application number: CN95244717U
Authority: CN
Inventors: 管贵宝
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-09-18
Filing date: 1995-09-18
Publication date: 1996-09-18
Anticipated expiration: 2005-09-18

Abstract

The utility model relates to a high efficiency solar energy heat collecting pipe. The utility model is mainly characterized in that the design comprises a reflecting body, a heat amount receiving pipe and a medium pipe, wherein, the reflecting body can be designed to a close type light condensing pipe having symmetric paraboloidal pipe walls. Two paraboloidal pipe walls can be made into integration through a curved surface on the bottom surface of the pipe, and the top surface of the pipe can be sealed and connected with a transparent panel which can achieve sunlight permeation. Vacuum environment can be arranged in a pipe cavity. As a result, the utility model has the advantages of less heat gradient, heat loss reduction caused by convection current and heat transfer, high photo-thermal conversion efficiency and low heat loss, and can be widely used for various solar energy application devices for solar energy refrigeration, air-conditioning, power generation, solar energy drying, distillation, water heaters, etc.

Description

High-efficiency solar thermal-collecting tube

The utility model relates to the utilization of solar energy, specifically is a kind of solar thermal collector.

Solar energy is a kind of nature objective reality, and is inexhaustible, and the best energy that does not have any environmental pollution, therefore, countries in the world all spare no effort to have designed various helioplants in the problem of utilizing of research and development solar energy for a long time.As everyone knows, realize that the critical component of photo-thermal conversion is a solar thermal collector, it is related to the problem that can the mankind develop solar energy economically, so the scientific and technical personnel of various countries are at the solar thermal collector of exploring and design various designs hardy.By available data as can be known, the solar thermal collector that can see at present has focus solar collector and vacuum tube type heat collector two big classes basically.Focus solar collector generally is designed to open type, and it is that symmetrically arranged by two, as to have a parabolic reflector reflector and a heat receiving tube constitutes, and receiving tube is arranged on the focus place of reflector.The shortcoming of this heat collector is that thermal gradient is big, the thermal losses height.Existing vacuum tube type heat collector only with a vacuum type receiving tube that has medium tube, does not have reflection unit, and sunshine directly is pooled on this receiving tube through the transparent panel of heat collector.This heat collector is difficult to obtain high thermal source, and can not make full use of the scattered light of the sun.

The purpose of this utility model is for a kind of high-efficiency solar thermal-collecting tube of existing optically focused heat absorption can the minimizing again heat convection losses is provided, make the direct projection light and the reflection ray that in most times of illumination, can fully receive sunshine, have higher photo-thermal conversion ratio and lower thermal losses, be suitable for multiple helioplant.

Realize the utility model of above-mentioned purpose, include a reflector and the heat receiving tube with a symmetrical parabola reflecting surface, receiving tube is arranged on the place, parabola focal position of reflector.But the reflector among the design is one to have the enclosed type condenser tube ferrule of the parabolic tube wall of symmetric double, and the pipe bottom surface fuses two parabolic tube walls with a curved surface, the transparent panel that pipe end face sealing-in one confession sunlight sees through; Be arranged to vacuum environment in the tube chamber.

For further reducing the thermal convection current and the heat conduction losses of heat collector, the receiving tube that is arranged on the place, parabola focal position of two reflectors among the design is a vacuum absorption pipe, and make vacuum in the condenser tube ferrule be provided with to such an extent that relatively be lower than vacuum and inhale the vacuum of herding in the pipe, being to be high vacuum in the absorption tube, is low vacuum in the condenser tube ferrule.

Therefore, because the condenser tube ferrule among the design seals, the arcwall that has the reflect focalization effect in the inwall of two symmetrical sidewalls and bottom surface are equal, and be vacuum environment in the pipe, therefore, thermal gradient of the present utility model is little, has also reduced because of the convection current thermal losses that conduction causes with heat, has the high and low advantage of thermal losses of photo-thermal conversion efficiency.The utility model can be devices such as solar refrigerating, solar airconditioning, solar energy thermal-power-generating and solar energy drying, solar distilling, solar water heater and brings breakthrough application prospect, and makes these application really have Practical significance and economic worth.

Below in conjunction with the accompanying drawing illustrated embodiment the utility model is described specifically.

Description of drawings:

Fig. 1 is the forward view of the embodiment one of the utility model;

Fig. 2 is the sectional view of Fig. 1.

Fig. 3 is the sectional view of the embodiment two of the utility model.

See by Fig. 1, embodiment shown in Figure 2, present embodiment be a kind of have two in the solar energy heat collection pipe of pipes, it mainly is made of pipe 5 in condenser tube ferrule 1, vacuum absorption pipe 4 and two media.In the present embodiment, condenser tube ferrule 1 usefulness glass material is made, and is evacuated in the inner chamber; Absorption tube 4 usefulness thin-walled quartz glass tubes are made, and be pumped into than the higher vacuum of vacuum in condenser tube ferrule 1 inner chamber inside; Pipe 5 is that outer surface is made the thin-walled copper tube that blackout is handled in the medium.Front view by present embodiment shown in Figure 1 is seen, condenser tube ferrule 1 is a straight tube with certain-length, two ends seal with sealing-in plate 3, vacuum absorption pipe 4 is installed in the focal position of condenser tube ferrule 1, the two ends that are arranged on pipe 5 in the medium in the vacuum absorption pipe 4 communicate with the external world, can be connected with the tube connector in the external world.Sectional view by present embodiment shown in Figure 2 sees that the two side 6 of condenser tube ferrule 1 is symmetrically arranged two parabolic tube walls, has two focus points, and two focus points all are positioned at same absorption tube 4, respectively is provided with in the medium on two focal positions and manages 5.In the present embodiment, the pipe bottom surface 7 of condenser tube ferrule 1 is an ellipsoid, and this ellipse facial canal bottom surface 7 fuses two parabolic tube walls 6.For increasing reflectivity and absorptivity, can on the inner surface of two side 6 and pipe bottom surface 7, be coated with the reflecting layer, on the inwall of absorption tube 4, be coated with selectively absorbing layers.

When the two side 6 of condenser tube ferrule 1 and pipe opaque metal material of bottom surface 7 usefulness or organic material manufacturing, the end face 2 of condenser tube ferrule 1 must be made with transparent material.

Embodiment illustrated in fig. 3 is a kind of solar energy heat collection pipe of single internal tube, be with the difference of the foregoing description, symmetrically arranged two parabolic tube walls of condenser tube ferrule 1 have focus altogether, on the burnt position of this copolymerization, be provided with in the medium and manage 5, and, in the present embodiment, the pipe bottom surface 7 of condenser tube ferrule 1 also is a parabola, and this parabolic facial canal bottom surface 7 fuses two parabolic tube walls 6.

Claims

1, a kind of reflector with a symmetrical parabola reflecting surface and high-efficiency solar thermal-collecting tube of a heat receiving tube of including, receiving tube is arranged on the place, parabola focal position of two reflectors, it is characterized in that, said reflector is one to have the enclosed type condenser tube ferrule (1) of symmetrical parabolic tube wall, pipe bottom surface (7) fuses two parabolic tube walls (6) with a curved surface, the transparent panel that the sealing-in one of pipe end face (2) sees through for sunlight; Be arranged to vacuum environment in the tube chamber.

2, according to the described thermal-collecting tube of claim 1, it is characterized in that said receiving tube (4) is a vacuum absorption pipe, and the vacuum in the condenser tube ferrule (1) relatively is lower than the vacuum in the vacuum absorption pipe (4).

3, according to claim 1 or 2 described thermal-collecting tubes, it is characterized in that the symmetrical parabolic tube wall (6) of condenser tube ferrule (1) has two focuses, pipe bottom surface (7) fuses two parabolic tube walls (6) with an ellipsoid.

4, according to claim 1 or 2 described thermal-collecting tubes, it is characterized in that the symmetrical parabolic tube wall (6) of condenser tube ferrule (1) has a confocal point, pipe bottom surface (7) fuses two parabolic tube walls (6) with a parabola.