CN201672695U

CN201672695U - Focusing flat solar thermal collector

Info

Publication number: CN201672695U
Application number: CN2010202035144U
Authority: CN
Inventors: 姚卫国
Original assignee: ZHEJIANG MEIDIYA NEW ENERGY TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG MEIDIYA NEW ENERGY TECHNOLOGY Co Ltd
Priority date: 2010-05-22
Filing date: 2010-05-22
Publication date: 2010-12-15
Anticipated expiration: 2020-05-22

Abstract

The utility model discloses a focusing flat solar thermal collector, belonging to the field of a flat solar thermal collector and comprising a solar energy absorption block. A transparent cover plate composed of a plurality of Fresnel lenses is installed above the solar energy absorption block. The focusing flat solar thermal collector has the advantages of high thermal collection efficiency, fast thermal absorption, small heat loss, good thermal insulation property and small volume.

Description

Focusing flat plate solar heat collector

Technical field

The utility model discloses a kind of focusing flat plate solar heat collector, belongs to the flat-plate solar collector field.

Background technology

Flat-plate solar heat collector mainly contains several parts such as heat-absorbing plate core, transparent cover plate, insulating and shell and forms.Whether change direction by the solar radiation that enters aperture, solar thermal collector can be divided into focus solar collector, non-focus solar collector.

When flat-plate solar heat collector is worked, after transparent cover plate is passed in solar radiation, be incident upon on the absorber plate, absorbed by absorber plate and change into heat energy, pass to the heat-transfer working medium in the absorber plate then, the temperature of heat-transfer working medium is raise, as the useful energy output of heat collector; Meanwhile, the absorber plate after temperature raises inevitably will become the thermal loss of heat collector by modes such as conduction, convection current and radiation to heat radiation all around.

At present, flat-plate solar heat collector mostly is to adopt transparent toughened glass as euphotic cover plate, and all is non-light-focusing type.This non-focus solar collector is compared with the heat collector of light-focusing type, has following shortcoming:

1. solar energy utilization ratio is not high, and heat is not concentrated, and loses bigger.

2. erection space is bigger, and installs easy inadequately.

3. the non-ferrous metal materials are more, and cost is higher.

The utility model content

In order to solve the existing shortcoming of above-mentioned heat collector, the utility model provides a kind of collecting efficiency height, and heat absorption is fast, the focusing flat plate solar heat collector that erection space is little.

To achieve these goals, the technical scheme that the utility model adopted is:

A kind of focusing flat plate solar heat collector comprises heat-absorbing plate core, and the top of described heat-absorbing plate core is equipped with the transparent cover plate of being made up of some Fresnel Lenses.Adopt Fresnel Lenses to replace the transparent cover plate of normal transparent safety glass as heat collector, sunshine is through behind the Fresnel Lenses, and light is gathered together, and makes centralized heat energy near the copper pipe of heat-absorbing plate core, reduces area of dissipation, thereby improves the absorptivity of heat.

Described transparent cover plate is made up of the Fresnel Lenses that 60, size are 120mm * 120mm * 3.5mm.

Described heat-absorbing plate core comprises the thermal-arrest water pipe and welds together and scribble the aluminium sheet of heat absorbing coating with it.Being coated with the aluminium sheet structural design of heat absorbing coating, is the prior art of flat-plate solar collector, seldom gives unnecessary details at this.

The bottom of described heat-absorbing plate core and periphery are equipped with the phenol formaldehyde foam composite plate, and transparent cover plate places the upper surface of heat-absorbing plate core periphery phenol formaldehyde foam composite plate.The setting of phenol formaldehyde foam composite plate makes heat insulation effect of the present utility model better, has further improved heat exchanger effectiveness.

The outer wall of described phenol formaldehyde foam composite plate is equipped with housing.

Described housing comprises aluminum alloy frame and glazing bead, and wherein glazing bead is pressed on the upper surface of transparent cover plate.

Described thermal-arrest water pipe is a coiled thermal-arrest water pipe, and is bell-mouthed shape between each adjacent two copper pipe of this coiled thermal-arrest water pipe.So design helps heat transfer medium flowing in copper pipe, reduces fluid resistance and can reduce thermal loss, thereby improve heat exchanger effectiveness and rate of heat exchange.Specifically, in hydrodynamics, fluid resistance refers to the resistance that fluid flows through in the conduit to be run into.The thermodynamic principles that flow at pipeline according to fluid as can be known, the snake bend elbow is made bell-mouthed shape can reduce fluid resistance; Conservation of energy when Bernoulli equation discloses fluid and flows in gravitational field, according to Bernoulli equation as can be known, in gravitational field, under the constant situation of other conditions, fluid resistance is more little, and the mechanical energy of loss is just more little, and fluid is just big more at ducted flow velocity; Therefore, the snake bend elbow is made bell-mouthed shape, helps heat transfer medium flowing in copper pipe more, reduces fluid resistance and can reduce thermal loss, thereby improved heat exchanger effectiveness and rate of heat exchange.

The utility model focusing flat plate solar heat collector, the collecting efficiency height, heat absorption is fast, and thermal loss is little, good heat insulating, volume is little, and (size can be accomplished 1250mm * 800mm * 100mm).

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Description of drawings

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

Fig. 2 is that the A of Fig. 1 is to schematic top plan view;

Fig. 3 is the structural representation of Fresnel Lenses;

Fig. 4 is the schematic top plan view of Fig. 3;

Fig. 5 is a Fresnel Lenses transmission schematic diagram of the present utility model.

The specific embodiment

As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, the utility model focusing flat plate solar heat collector, comprise heat-absorbing plate core, the top of heat-absorbing plate core is equipped with by 60, size and is the transparent cover plate 2 that the Fresnel Lenses 21 of 120mm * 120mm * 3.5mm is formed, and forms an integral body jointly between each Fresnel Lenses 21.

Heat-absorbing plate core comprises thermal-arrest water pipe 4 and welds together and scribble the aluminium sheet 5 of heat absorbing coating with it.The bottom of heat-absorbing plate core and periphery are equipped with phenol formaldehyde foam composite plate 3, and transparent cover plate 2 places the upper surface of heat-absorbing plate core periphery phenol formaldehyde foam composite plate 3.The outer wall of phenol formaldehyde foam composite plate 3 is equipped with housing.Housing comprises aluminum alloy frame 1 and glazing bead 8, and wherein glazing bead 8 is pressed on the upper surface of transparent cover plate 2.

Thermal-arrest water pipe 4 is a coiled thermal-arrest water pipe, and is bell-mouthed shape between each adjacent two copper pipe 41 of this coiled thermal-arrest water pipe.

As shown in Figure 5, solar energy is through being collected on the aluminium sheet 5 that scribbles heat absorbing coating behind the Fresnel Lenses 21, hot spot be a line be distributed in thermal-arrest water pipe 4 around.

Cold medium enters from water inlet 6, and thermal medium comes out from delivery port 7.

The foregoing description only is used to the inventive concept of the present utility model of explaining, but not to the qualification of the utility model rights protection, allly utilizes this design that the utility model is carried out the change of unsubstantiality, all should fall into protection domain of the present utility model.

Claims

1. a focusing flat plate solar heat collector comprises heat-absorbing plate core, it is characterized in that: the top of described heat-absorbing plate core is equipped with the transparent cover plate of being made up of some Fresnel Lenses.

2. focusing flat plate solar heat collector as claimed in claim 1 is characterized in that: described transparent cover plate is made up of the Fresnel Lenses that 60, size are 120mm * 120mm * 3.5mm.

3. focusing flat plate solar heat collector as claimed in claim 1 or 2 is characterized in that: described heat-absorbing plate core comprises the thermal-arrest water pipe and welds together and scribble the aluminium sheet of heat absorbing coating with it.

4. focusing flat plate solar heat collector as claimed in claim 3 is characterized in that: the bottom of described heat-absorbing plate core and periphery are equipped with the phenol formaldehyde foam composite plate, and transparent cover plate places the upper surface of heat-absorbing plate core periphery phenol formaldehyde foam composite plate.

5. focusing flat plate solar heat collector as claimed in claim 4 is characterized in that: the outer wall of described phenol formaldehyde foam composite plate is equipped with housing.

6. focusing flat plate solar heat collector as claimed in claim 5 is characterized in that: described housing comprises aluminum alloy frame and glazing bead, and wherein glazing bead is pressed on the upper surface of transparent cover plate.

7. focusing flat plate solar heat collector as claimed in claim 3 is characterized in that: described thermal-arrest water pipe is a coiled thermal-arrest water pipe, and is bell-mouthed shape between each adjacent two copper pipe of this coiled thermal-arrest water pipe.