CN2205945Y

CN2205945Y - Solar focusing heat collector with composite paraboloid

Info

Publication number: CN2205945Y
Application number: CN94220461U
Authority: CN
Inventors: 蒋根弟
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-31
Filing date: 1994-08-31
Publication date: 1995-08-23
Anticipated expiration: 2004-08-31

Abstract

The utility model relates to a solar focusing heat collector with a composite paraboloid, comprising a casing body, a groove-shaped light condenser with a composite paraboloid which can be arranged in the casing body, a paraboloid heat absorption plate which is arranged on the outlet point of the light ray of the light condenser, a heating pipe which can be combined with the evagination surface of the heat absorption plate, and a fluid inlet pipe and a fluid outlet pipe which can be arranged on the side wall of the casing body and can be used for connecting the heating tube and an exterior pipeline. The utility model has the advantages of high light condensing efficiency, no need of a sunlight tracking device, etc. The components of the heat collector such as the casing body, the heat absorption plate, the heating pipe, etc. can adopt heat-insulating material or a spectral selectivity coating layer, which can effectively prevent heat escape and enhance heat collection effect.

Description

Solar focusing heat collector with composite paraboloid

The utility model relates to solar thermal collector, relates in particular to a kind of composite parabolic light-concentrating solar heat-collection device.

Existing solar thermal collector mainly adopts absorption and the light collecting two kinds of principles of imaging, and wherein absorption type solar heat collector utilizes direct projection or diffusion sunlight, low, the inefficiency of its heat-collecting temperature.The imaging concentrating solar collector is radiated the solar ray collecting of incident on the absorption plant, improved heat-collecting temperature thus, but it need add the sunshine tracking device and make it all the time towards the sun, and this has increased the production cost and the technical difficulty of solar thermal collector undoubtedly.Disclose as No. 89203120.4 Chinese utility application and a kind ofly will absorb a kind of solar thermal collector that combines with imaging optically focused principle, it is also good than simple absorption that it has removed sunshine tracking device and heat build-up effect from, but because heat absorption tube sheet wherein is installed in the front portion of speculum, the incident ray that projects on the mirror surface is brought barrier effect to a certain extent, thereby had influence on Heat-collecting effect.

The purpose of this utility model is to provide a kind of light gathering efficiency height, Heat-collecting effect is good and need not the composite parabolic light-concentrating solar heat-collection device of sunshine tracking device.

According to a kind of composite parabolic light-concentrating solar heat-collection device of the present utility model, it comprises housing, be arranged at least one the flute profile compound parabolic concentrator in the housing, be arranged on the parabolic absorber plate at described concentrator light outlet place, be arranged at least one heating tube of one with the outer convex surface of described absorber plate, and be arranged on the described housing sidewall, go out pipe in order to fluid inlet tube and the fluid that connects described heating tube and exterior line.

Composite parabolic light-concentrating solar heat-collection device of the present utility model, owing to adopt flute profile compound parabolic concentrator optically focused, its light gathering efficiency increases and need not to adopt the sunshine tracking device as servicing unit, so reduced production cost and technical difficulty.And, absorber plate is arranged on the light outlet place of concentrator, the incident ray that projects on the concentrator internal face there is not any barrier effect, parts such as the housing of heat collector, absorber plate, heating tube have all adopted insulation material or spectrum selective paint in addition, so prevent that effectively heat from escaping, further improved the Heat-collecting effect of heat collector.

Next in conjunction with the accompanying drawings and embodiments composite parabolic light-concentrating solar heat-collection device of the present utility model is described in further detail.

Fig. 1 is the design principle figure of a concentrator of composite parabolic light-concentrating solar heat-collection device of the present utility model;

Fig. 2 is the schematic diagram of the housing of composite parabolic light-concentrating solar heat-collection device of the present utility model;

Fig. 3 A and 3B are the structural representations of composite parabolic light-concentrating solar heat-collection device of the present utility model.

Referring to Fig. 1, the used concentrator 1 of the utility model adopts a kind of flute profile composite paraboloid structure, it comprises the two block length bar shaped

parabolic panels

11 and 12 that are oppositely arranged, this

parabolic panel

11 and 12 should be provided with to such an extent that make all enter the light 13 of concentrator 1 with maximum angle, can accumulate in the outlet edge 14 of concentrator 1 after at the most through internal face reflection once just.Like this, after the incident ray littler than this maximum angle passing through the primary event of internal face, can both all radiate by the exit.Dotted line 17 expression incident raies 13 project the internal face back reflection to the movement locus of the collected light in concentrator 1 exit (below be called the optically focused trajectory) with different angles among the figure.

Next the structure and the installation of composite parabolic light-concentrating solar heat-collection device of the present utility model are described with reference to Fig. 2 and Fig. 3.Wherein, Fig. 3 A is the profile of expression heat collector along the A-A line of housing 9, and Fig. 3 B is the profile of expression heat collector along the B-B line of housing 9.Heat collector of the present utility model comprises flute profile compound parabolic concentrator 1, parabolic absorber plate 2, and heating tube 3, isocon 4, header 5(and isocon 4 symmetries, not shown), fluid inlet tube 6, fluid goes out pipe 7, transparent cover plate 8 and housing 9.Wherein, housing 9 comprises sidewall 91 to 94 and base plate, it for example uses the hard polyurethane foam die forming, or makes with the single-layer metal plate that insulation material (for example composite magnesium silicate) is coated on the surface, also can make with the double-level-metal plate of inner filling

insulation material.Sidewall

91 and 92 has through hole respectively on the position near

sidewall

93 and 94, fluid inlet tube 6 and fluid are set respectively on it pipe 7, and the top of housing 9 is provided with transparent cover plate 8.

Fig. 3 A and 3B show four concentrators 1 are installed in a heat collector, and certainly, its quantity can be decided as required.The

parabolic panel

11 and 12 of concentrator 1 is for example made by stainless steel mirror board or with glass system mirror, wherein, be close to the

parabolic panel

11 and 12 of housing 9 two

sides

91 and 92, for example be installed in the top of

sidewall

91 and 92 respectively by screw (not shown), and the

parabolic panel

11 and 12 of adjacent two concentrators 1 for example is fixed together by screw (not shown).In addition,

parabolic panel

11 and 12 two ends also for example are fixed on

sidewall

93 and 94 by hold assembly.

Parabolic absorber plate (for example using copper coin) 2 is arranged on the exit of each concentrator 1 and the position that aforementioned optically focused trajectory 17 coincides, and the parabolic panel 11 of its length and

concentrator

1 and 12 length are about equally.Heating tube (for example using copper pipe) 3 extended along the length direction of parabolic absorber plate 2, and it for example is arranged to one by the welding and the outer convex surface of absorber plate 2.Illustrate every absorber plate 2 two heating tubes 3 are set, certainly, its quantity can be decided as required.Isocon 4 and header 5 are horizontally installed on the two ends of heating tube 3 respectively, it for example adopts the cross section is that square, port is circular copper pipe,, and for example be fixed on through

hole

41 and 51 in the face of having the through

hole

41 and 51 with the quantity and the equal diameters of heating tube 3 on the sidewall of heating tube 3 at it by the port of welding with heating tube 3.During installation, the circular port of this isocon 4 and header 5 for example is connected to fluid inlet tube 6 by articulation (not shown) and fluid goes out on the pipe 7.

Can apply a kind of spectral selection material (for example on the metal covering of polishing, being coated with the very thin carbon of last layer) on the outer surface of above-mentioned parabolic absorber plate 2, heating tube 3 and isocon 4 and header 5 respectively.It makes absorber plate 2 on the one hand and also can absorb the heat that direct sunlight (promptly when incident ray is in minimum angles) is produced effectively except the heat that can absorb converging ray and produce, and can stop the heat of absorber plate 2 and isocon 4 and header 5 inside to escape on the other hand.Above-mentioned cover plate 8 can adopt low individual layer of a kind of iron-holder or double glazing, makes it preferably to pass through sunlight.

During use, the fluid inlet tube 6 of heat collector of the present utility model and fluid are gone out pipe 7 be connected on the exterior line, after absorber plate 2 receives focused ray or direct sunlight, heat is conducted to 3 pairs of fluids heating wherein of heating tube.Certainly, according to design of the present utility model, those skilled in the art also can make all conversion to this.For example, heating tube 3 also can be used instead and come and go a pipe that circles round, and saves isocon 4 and header 5, but suchlike conversion all belongs to scope of the present utility model.

Claims

1, a kind of composite parabolic light-concentrating solar heat-collection device, comprise housing, it is characterized in that also comprising at least one the flute profile compound parabolic concentrator that is arranged in the housing, be arranged on the parabolic absorber plate at described concentrator light outlet place, with the outer surface of described absorber plate at least one heating tube of all-in-one-piece is set, and is arranged on the described housing sidewall, goes out pipe in order to fluid inlet tube and the fluid that connects described heating tube and exterior line.

2, solar thermal collector as claimed in claim 1, it is characterized in that further comprising being arranged on isocon and the header that described heating tube and described fluid inlet tube and fluid go out between the pipe and connect with it, described isocon and header are horizontally installed on the two ends of described heating tube respectively.

3, solar thermal collector as claimed in claim 1 or 2, it is characterized in that, described flute profile compound parabolic concentrator comprises and is oppositely arranged to such an extent that make all enter the light of concentrator with maximum angle, can accumulate in the two block length bar shaped parabolic panels at the outlet edge place of concentrator after at the most through internal face reflection once just.

4, solar thermal collector as claimed in claim 1 or 2 is characterized in that further comprising the transparent cover plate of one deck at least that is arranged on described case top.

5, solar thermal collector as claimed in claim 4 is characterized in that described transparent cover plate is made up of the low glass of iron-holder.

6, solar thermal collector as claimed in claim 1 or 2 is characterized in that the outer surface of described absorber plate and described heating tube applies the thin carbon of one deck.

7, solar thermal collector as claimed in claim 3 is characterized in that described parabolic panel is made up of stainless steel mirror board or glass system mirror.