CN2758657Y

CN2758657Y - Cavity type solar energy receiver

Info

Publication number: CN2758657Y
Application number: CNU2004201092835U
Authority: CN
Inventors: 张耀明; 刘德有; 张文进; 孙利国; 张振远; 刘晓晖; 卞新高; 刘巍; 付春定
Original assignee: 张耀明; 张振远; 张文进
Priority date: 2004-11-30
Filing date: 2004-11-30
Publication date: 2006-02-15
Anticipated expiration: 2014-11-30

Abstract

The utility model relates to a cavity type solar energy receiver, which belongs to the technical field of solar energy heat utilization. The receiver comprises a housing, a transparent sealed window arranged on one end of the housing, a heat absorption and heat storage inner liner supported in the housing, and an outlet pipe and an inlet pipe for operation fluid, wherein the transparent window forms an inwards recessed shape; the heat absorption and heat storage inner liner comprises an inner and an outer cavity bodies; the inner cavity body approaches the window, and the surface of the inner cavity body near the window is coated with a solar energy selective absorption coating; the inner cavity body is filled with heat conduction material used for enlarging heat exchange area; the outer cavity body is tightly contacted with the inner cavity body and is filled with high-heat-capacity heat-storage material. The utility model has the functions of heat absorption and heat storage, can rapidly generate high-temperature and high-pressure steam or gas, and has the characteristics of full heat exchange, sensitive response, little heat loss, high heat efficiency, strong operability, etc.

Description

The cavity-type solar receiver

Technical field

The utility model relates to a kind of solar receiver, and the cavity-type solar receiver that particularly a kind of suitable solar energy tower type thermal generation experimental rig uses belongs to the solar energy utilization technique field.

Background technology

Solar energy is inexhaustible regenerative resource, and in today of energy situation sternness like this, development and use solar energy is one of important channel of realizing energy supply diversification and assurance energy supply security.

In many solar energy utilizes, the tower type thermal generation device has the technique device of huge competitiveness beyond doubt, the experimental study proof solar energy thermal-power-generating of developed country is to be adapted to the effective way that heavy industrialization is used, therefore greatly developing solar energy thermal-power-generating not only can provide good clean energy resource for us, also can open up a new industry group's development, and bring revolutionary solution might for fully the energy problem of China's anxiety.Its basic principle is to utilize numerous heliostats, to the sun receiver that places high top of tower, heating working medium produces superheated steam with solar heat radiation reflection, or directly heats the water generates superheated steam in the heat collector, the generating of driving steam turbine generating set, thus solar energy is converted to electric energy.

The high temperature solar receiver is the core component of tower type thermal generation system.External this technology that centers on has been carried out several studies, mainly concentrates on countries such as Spain, Israel, the U.S., and domestic is blank in this respect substantially.The applicant once applied for " solar energy high-temperature vacuum heat absorption and heat storage apparatus " patent before this, aspect high-temperature heat-gathering device, proposed to have the scheme of certain novelty, main thought be utilize the conveyor screw metal tube be positioned at conveyor screw outer or airtight metallic cavity constitute inner bag, form vacuum interlayer between described inner bag and the outer cover, the technical scheme of filling high heat capacity heat storage material in the inner bag, and form vacuum tube or two kinds of structures of vacuum cavate.Anatomize this technology, electron tubes type structure wherein is because periphery all is in pellucidity, and heat loss is more much bigger than the cavate technical scheme of an opening undoubtedly; And the against vacuum cavity structure, when water flowed in the conveyor screw pipe, discharge was relatively large, and heat-exchange time is longer, and it is slower to react, and has certain defective.

The utility model content

At above-mentioned condition, the purpose of this utility model is, proposes a kind of cavity-type solar receiver, and this device should have little, the advantage such as be quick on the draw of heat loss, and maintains the heat absorption and heat storage function simultaneously.

In order to achieve the above object, the technical solution of the utility model is: a kind of cavity-type solar receiver, comprise shell, be contained in shell one end sealing transparent window, be supported on heat absorption and heat storage inner bag, working fluid outlet and inlet tube in the shell.Described transparent window is inner concavity, and described heat absorption and heat storage inner bag contains inside and outside two cavitys.Described inner chamber body adjacent window, it faces window surface-coated solar selectively absorbing coating, is filled with the heat-transfer matcrial that increases heat exchange area in the described inner chamber body.Described outer chamber is close to inner chamber body, wherein filling high heat capacity heat storage material.

Further improvement of the utility model is, described inlet tube has the aperture for the direction of flow inner chamber body for being positioned at inner chamber body one end ring pipe on the described endless tube, and the other end of described inner chamber body is connected with the working fluid outlet.

Like this, because whole receiver has the architectural feature of indent, the heat that is absorbed all concentrates in the cavity, and heat leakage reduces; Simultaneously owing to be filled with a large amount of heat-transfer matcrials in the cavity of adjacent window, therefore sufficient heat exchange area can be arranged, assurance obtains heat exchange fully rapidly by the working fluid that the aperture on the import endless tube flows out, and forms steam or high-temperature gas rapidly, is flowed out by outlet.This shows that the utility model has the heat absorption and heat storage function concurrently, compared with prior art, heat loss is little, and efficient improves, and practicality is stronger.

Description of drawings

Below in conjunction with accompanying drawing and exemplary embodiments the utility model is described further.

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

The specific embodiment

The cavity-type solar receiver architecture signal of present embodiment mainly is made up of bowl-shaped shell 1, heat-insulating material layer 13, the transparent bowl-type window 10 that is contained in the sealing of shell one end, the heat absorption and heat storage inner bag that is supported in the shell 1 as shown in Figure 1.The heat absorption and heat storage inner bag contains inside and outside two

cavitys

12,2, inner chamber body 12 adjacent window 10 wherein, the surface-coated solar selectively absorbing coating of its adjacent window (for example Pyromark 2500 etc.) wherein is filled with the spherical Heat Conduction Material that increases heat exchange area (other shapes such as bulk, needle-like, column also can).Outer chamber 2 is close to inner chamber body 12, and its outer surface is towards shell 1 inner surface, filling high heat capacity heat storage materials 9 in this cavity 2 (as made alumina balls etc.).

The front end of inner chamber body 12 is connected with the import endless tube 4 of working fluid, and endless tube 4 one sides have some apertures for the fluid outflow, and the centre position of inner chamber body 12 rear ends is connected with working fluid outlet 5.Whole window 10 is installed in the perforate of shell 1 by its front end outer potted component, is evacuated 3 between transparent window 10 and the close inner chamber body 12 of this window.The inner surface of shell 1 and face between the outer chamber 2 of inner surface of outer cover and also be evacuated 3 '.Be separately installed with the

check valve

6 and 7 of control flow in the pipeline of working fluid outlet 4 and inlet tube 5.

In order further to increase surperficial endotherm area, inner chamber body 12 outer surfaces of close window are through being processed to form small concavo-convex body uniformly.In order to prevent radiation loss, the inner surface of shell 1 is equipped with the minute surface 11 of infrared reflecting.Certainly transparent window 1 also can be made into cylindric or the spherical crown shape.Working fluid commonly used is a water.

During work, all heliostat reflexes to sun heat radiation on the sun receiver that places high top of tower simultaneously, the optically focused ratio is up to more than 500, the solar radiation energy at first shines window glass 10, and be transmitted to the inner surface of inner chamber body 12, because the solar selective absorbing coating of this surface-coated has the absorptivity height, the characteristic that radiance is low, therefore can effectively absorb heat, and spheroidal material 2 ' is wherein given in conduction, the current that flow out from annular entrance pipe 4 apertures are through the sufficient ball material of heat exchange area 2 ' surface, vaporization is rapidly flowed out by outlet 5 again, is supplied to facilities such as steam-electric power.

When the heat that absorbs is unnecessary, is close to inner chamber body 12 outer outer chamber 2 interior high heat capacity materials 9 and can further accumulates heat.And, because the inner surface of shell 1 is equipped with the minute surface 11 of infrared reflecting, can be so that thermal radiation loss descends.

Conclusion is got up, and the cavity-type solar receiver of present embodiment has following characteristics:

(1) the overall structure symmetry is good.

(2) whole receiver has the architectural feature of indent, and all heats of absorption all concentrate in the cavity, and heat leakage reduces.

(3) 10 whole of transparent windows are fixed by the outer of front end, and inner cavity is divided and kept free, so because the expansion issues that internal high temperature is brought etc. can not cause defective.

(4) heat exchange area is big, guarantees can obtain sufficient heat exchange via the working fluid that the some apertures on the import endless tube flow out, and produces steam or high-temperature gas rapidly.

In a word, cavity-type solar receiver of the present utility model integrates heat absorption, heat accumulation function, has strong operability, the efficient advantages of higher, be particularly suitable for the generating of Salar light-gathering heat and wait the high temperature use device, will play positive facilitation for the heat utilization that promotes solar energy.

Claims

1, a kind of cavity-type solar receiver, comprise shell, be contained in shell one end sealing transparent window, be supported on heat absorption and heat storage inner bag, working fluid outlet and inlet tube in the shell, it is characterized in that: described transparent window is inner concavity, and described heat absorption and heat storage inner bag contains inside and outside two cavitys; Described inner chamber body adjacent window, it faces window surface-coated solar selectively absorbing coating, is filled with the heat-transfer matcrial that increases heat exchange area in the described inner chamber body; Described outer chamber is close to inner chamber body, wherein filling high heat capacity heat storage material.

2, cavity-type solar receiver as claimed in claim 1 is characterized in that: described inlet tube has the aperture for the direction of flow inner chamber body for being positioned at inner chamber body one end ring pipe on the described endless tube, the other end of described inner chamber body is connected with the working fluid outlet.

3, cavity-type solar receiver as claimed in claim 1 or 2 is characterized in that: the front end outer of described transparent window is installed in the perforate of shell by potted component.

4, cavity-type solar receiver as claimed in claim 3 is characterized in that: described transparent window is cylinder indent, circular cone indent or spherical crown inner concavity.

5, cavity-type solar receiver as claimed in claim 4 is characterized in that: the heat-insulating material layer is installed in the described shell.

6, cavity-type solar receiver as claimed in claim 5 is characterized in that: be evacuated between described transparent window and the close inner chamber body of window; Described inner surface of outer cover and facing between the outer chamber of inner surface of outer cover is evacuated.

7, cavity-type solar receiver as claimed in claim 6 is characterized in that: the check valve that is separately installed with the control flow in the pipeline of described working fluid outlet and inlet tube.

8, cavity-type solar receiver as claimed in claim 7 is characterized in that: described inner chamber body inner surface is through being shaped on small concavo-convex body uniformly.

9, cavity-type solar receiver as claimed in claim 8 is characterized in that: the inner surface of the shell of stating is equipped with the minute surface of infrared reflecting.