CN101285623A - A solar flat collector with high porosity metal foam - Google Patents

Abstract

The invention relates to a solar plate heat collector containing foamed metal with high porosity, which relates to the technical field of solar energy, in particular to the technical field of solar heat collector devices capable of storing energy. The present invention comprises a transparent material layer, a phase-change material layer, a heat-absorbing plate, an insulating material layer, a serpentine tube, and a heat-conducting metal. The heat-absorbing plate is arranged under the transparent material layer, and the phase-change material layer is arranged under the heat-absorbing plate. The transparent material layer, the phase-change material layer, and the outer periphery of the heat-absorbing plate are provided with an insulating material layer, and the serpentine tube and the foamed metal with high porosity are integrated structures, which are respectively arranged in the phase-change material layer. The invention achieves the goals of good energy storage effect, high energy storage efficiency and effective improvement of phase change energy storage speed.

Description

A solar flat collector with high porosity metal foam

technical field

The invention relates to the technical field of solar energy, in particular to the technical field of a solar thermal collector device capable of storing energy.

Background technique

The heat storage technology of phase change materials has been widely promoted and applied in the air conditioner, solar energy industry and building energy saving, mainly because of its excellent heat storage performance. Combining phase change materials with flat plate collectors does not require additional storage tanks. It can not only meet the requirements of building integration, but also realize the continuous supply of energy and the constant temperature of the water supply.

However, the inherent characteristics of the existing organic phase change materials are low thermal conductivity and slow heat transfer, resulting in poor energy storage effect and low energy storage efficiency. Especially the discontinuity and discontinuity of solar radiation and the low thermal conductivity of phase change materials, the speed of phase change energy storage is very low.

Contents of the invention

The object of the present invention is to provide a solar plate heat collector containing foamed metal with high porosity, which has good energy storage effect, high energy storage efficiency and can effectively improve the phase change energy storage speed.

In order to achieve the above object, the present invention adopts the following technical solutions:

The present invention comprises a transparent material layer, a phase-change material layer, a heat-absorbing plate, an insulating material layer, a serpentine tube, and a heat-conducting metal. The heat-absorbing plate is arranged under the transparent material layer, and the phase-change material layer is arranged under the heat-absorbing plate. The transparent material layer, the phase-change material layer, and the outer periphery of the heat-absorbing plate are provided with an insulating material layer, and the serpentine tube and the foamed metal with high porosity are integrated structures, which are respectively arranged in the phase-change material layer.

Preferably, the transparent material layer is a flat glass layer.

More preferably: the above-mentioned flat glass layer is a single layer or double layer of flat glass layers.

Preferably, the above-mentioned heat absorbing plate is coated with a selective absorbing coating.

Preferably, the phase change material layer is paraffin wax with high melting point and large phase change latent heat.

The present invention adopts above-mentioned technical scheme, has following advantage compared with prior art:

1. With the introduction of the concept of building integration, the advantages of flat plate collectors in combining with buildings are obviously superior to those of vacuum tubes and heat pipes, and they can bear loads. At the same time, the combination of flat plate collectors and phase change materials can achieve continuous energy supply and save the traditional hot water storage tank, which not only saves space and cost for users, but also is more conducive to the beauty of the building.

2. The use of phase change materials to fill in the flat plate collectors, the use of latent heat energy storage has a large energy storage capacity, and when the phase change energy is stored and released, the temperature change is small, and stable energy storage and release can be achieved characteristic.

3. However, the inherent characteristics of organic phase change materials (such as paraffin, etc.) are small thermal conductivity and slow heat transfer. Adding foam metal to paraffin can not only strengthen the effect of heat transfer, increase the rate of heat transfer, but also It plays the role of supporting the heat collector during the paraffin melting process and prevents the deformation of the heat absorbing plate and the heat collector.

4. Adopting new materials (metal foam, such as aluminum foam, etc.), this porous material can form a paraffin/metal foam composite phase change energy storage material, which can greatly improve thermal conductivity. Optimize energy storage characteristics.

5. The present invention solves the problems of discontinuity and discontinuity of solar radiation and low thermal conductivity of phase change materials, effectively improves the speed of phase change energy storage, and saves space and cost for users because no traditional water tank is needed .

Description of drawings

Figure 1 is a schematic structural view of the non-enhanced heat transfer technology of the present invention.

Fig. 2 is a schematic structural view of a metal foam with high porosity provided in the present invention.

FIG. 3 is a top view of FIG. 2 .

Among them: single-layer or double-layer flat glass 1, phase-change material layer 2, heat-absorbing plate coated with selective absorption coating 3, insulation material layer 4, serpentine copper pipe 5, and high-porosity metal foam 6.

Detailed ways

The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, the present invention includes a transparent material layer 1, a phase change material layer 2, a heat absorbing plate 3, an insulating material layer 4, and a serpentine tube 5, and the heat absorbing plate 3 is arranged below the transparent material layer 1 , the phase-change material layer 2 is arranged under the heat-absorbing plate 3, and the outer periphery of the transparent material layer 1, the phase-change material layer 2, and the heat-absorbing plate 3 is provided with an insulating material layer 4, and the serpentine tube 5 and the high-porosity metal foam 6 is an integrated structure, which is respectively arranged in the phase change material layer 2 .

As shown in Fig. 1, Fig. 2 and Fig. 3: the transparent material layer 1 of the present invention is a flat glass layer. The flat glass layer is single-layer or double-layer flat glass.

The present invention coats the heat absorbing plate 3 with a selective absorbing coating.

The phase change material layer 2 of the present invention is paraffin wax with high melting point and large latent heat of phase change.

When the present invention is actually implemented, it is not limited to the manners of the above-mentioned embodiments.

Claims (5)

1, a kind of solar flat heat collector containing high porosity metal foam, it is characterized in that comprising transparent material layer (1), phase-change material layer (2), heat-absorbing plate (3), insulation material layer (4), serpentine tube (5), heat-conducting metal, the heat-absorbing plate (3) is arranged under the transparent material layer (1), the phase-change material layer (2) is arranged under the heat-absorbing plate (3), and the transparent material layer (1 ), the phase-change material layer (2), the outer periphery of the heat-absorbing plate (3) is provided with an insulating material layer (4), and the serpentine tube (5) and high-porosity metal foam (7) are respectively arranged on the phase-change material layer (2) inside. 2. The energy-storage flat solar collector with metal fins added according to claim 1, characterized in that the transparent material layer (1) is a flat glass layer. 3. The energy-storage flat-plate solar collector with metal fins added according to claim 2, characterized in that the above-mentioned flat glass layer is a single-layer or double-layer flat glass layer. 4. The solar flat plate heat collector containing foam metal with high porosity according to claim 1, characterized in that the above-mentioned heat absorbing plate (3) is coated with a selective absorbing coating. 5. The solar flat plate heat collector containing foamed metal with high porosity according to claim 1, characterized in that the phase change material layer (2) is paraffin wax with high melting point and large latent heat of phase change.

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