CN201425380Y - A new heat storage collector - Google Patents

Abstract

A novel heat storage collector comprises a shell, a transparent cover plate, a U-shaped heat exchange tube, a heat absorption plate, a heat storage medium warehouse and an insulation layer. The heat exchange tubes are U-shaped bent, pass through the heat absorbing plate and are located on both sides of the heat absorbing plate, the upper heat exchange tube is connected to the upper surface of the heat absorbing plate, and the lower heat exchange tube passes through the middle of the closed heat storage medium warehouse provided below; There is a heat storage medium with a large specific heat capacity in the heat storage medium warehouse, and the heat storage medium is used to temporarily store excess heat and release the stored heat when needed, which can meet the requirements of uninterrupted heating of the fluid in the heat exchange tube and heat absorption The abundant heat of the plate is stored by the heat storage medium, which effectively reduces the volume of the required water tank, has high heat absorption efficiency, and the utility model has a simple structure, relatively low cost, and is easy to be popularized and applied in a large area.

Description

A new heat storage collector

technical field

The utility model relates to the application field of solar heat collectors, in particular to a plate type heat storage heat collector with simple structure and good heat storage effect.

Background technique

As we all know, most of the flat-plate heat collectors sold in the market do not have heat storage function, so that at night or in rainy weather, there will be no solar energy, or the solar energy will be greatly reduced, which will bring a lot of inconvenience to users, so collectors with heat storage function Heaters are urgently needed by people. At present, there are only a small number of flat plate collectors with heat storage function, but the structure is often complicated, the energy utilization rate is low, and the product cost is high, which is not conducive to the promotion and use of large areas.

In view of this, it is necessary to provide a new type of heat storage collector, which has good heat storage (discharge) effect, simple structure, relatively low product cost, and is easy to be popularized and applied in a large area.

Utility model content

The purpose of the utility model is to provide a new heat storage collector, which has good heat storage effect, simple structure, relatively low product cost, and is easy to popularize and apply in a large area.

In order to achieve the above purpose, the technical solution adopted by the utility model is a new heat storage collector, including a shell, a transparent cover plate, a heat exchange tube, a heat absorption plate, a heat storage medium warehouse and an insulation layer. There is a heat storage medium with a large specific heat capacity in the medium chamber; the heat exchange tube is U-shaped, passing through the heat absorbing plate and located on both sides of the heat absorbing plate, the upper heat exchange tube is connected to the upper surface of the heat absorbing plate, and the lower heat exchange tube It passes through the middle part of the airtight heat storage medium bin arranged below.

Further, the heat storage medium is any one of sodium sulfate decahydrate, paraffin, and calcium chloride hexahydrate.

Further, the heat absorbing plate is coated with chrome black, a selective absorbing coating. It can effectively reduce light reflection and improve the heat absorption capacity of the plate.

Further, both the heat storage medium bin and the shell adopt a streamlined structure design, and the cross-section is an arc-shaped structure.

Compared with the prior art, the utility model has the following positive effects:

1. The utility model is provided with a heat storage medium bin under the heat absorbing plate, which stores a heat storage medium with a large specific heat capacity. During the working process, the heat absorbing plate transfers the remaining heat to the heat storage Heat medium transfer: In addition to delivering high-temperature water to the next flat-plate heat collector or hot water storage tank, the lower heat exchange tube also uses the surface to transfer heat to the heat storage medium. The two aspects will store sufficient heat. When the sunlight is insufficient, The heat stored in the heat storage medium will transfer heat to the low-temperature medium water in the lower heat exchange tube in the opposite direction through the heat absorption plate. To a large extent, the volume of the hot water tank can be reduced, which not only saves the space and cost of the user, reduces the load on the roof, improves the safety factor of the house, but also contributes to the beauty of the building.

2. The heat storage medium of the present utility model is any one of sodium sulfate decahydrate, paraffin, and calcium chloride hexahydrate. Both are heat storage media with large specific heat capacity, and have greater heat storage capacity than water. The heat storage performance is good, and the price is low, and it is suitable for popularization and use in a large area.

3. Both the heat storage medium bin and the shell of the utility model are designed with a streamlined structure, which is an arc structure. When installed on the roof at a certain angle, the wind pressure on the back of the flat plate collector can be reduced, and the installation conditions are improved. The heat loss is reduced and the safety factor is improved at the same time.

4. The influence of the waste heat of the heat storage medium improves the freezing problem of the flat plate collector in winter and expands its application range in the northern region.

Description of drawings

The utility model will be described in further detail below according to the accompanying drawings and embodiments.

Fig. 1 is a schematic structural view of a preferred embodiment of the utility model.

In the picture:

1. Transparent cover plate; 2. Heat exchange tube (upper and lower layers); 3. Heat absorbing plate; 4. Heat storage chamber wall; 5. Shell; 6. Heat storage medium; 7. Insulation layer.

Detailed ways

Fig. 1 is a schematic diagram of the structural composition of a preferred embodiment of the utility model, the new heat storage collector includes a transparent cover 1 and a shell 5, in this embodiment, the transparent cover 1 is a glass layer with good light transmission , and the bottom of the transparent cover plate 1 is provided with a heat absorbing plate 3, which is coated with a selective absorption coating, where chrome black is used, the utilization rate of the light receiving area of the heat collector is 100%, and there is no light leakage; The heat plate 3 and the heat storage chamber wall 4 form an airtight heat storage medium chamber, in which a heat storage medium 6 is placed, which can be one of sodium sulfate decahydrate, paraffin, and calcium chloride hexahydrate. In this embodiment, the The heat storage medium 6 is sodium sulfate decahydrate, and its physical parameters are: specific gravity 1.48; solid average specific heat capacity 5.56J/(gk); liquid average specific heat capacity 14.38J/(gk); heat of fusion 250.5J/g; melting point 32.38°C. It has better heat storage performance and lower price.

The heat exchange tube 2 is U-shaped bent, passes through the heat absorbing plate 3, and is located on both sides of the heat absorbing plate 3, the upper heat exchange tube is connected to the upper surface of the heat absorbing plate to form a good heat conduction, and the lower heat exchange tube is arranged below The middle part of the airtight heat storage medium tank passes through, and the two ends of each heat exchange tube 2 are respectively connected with the water inlet header and the water outlet header, wherein, the upper layer is connected with the water inlet header, and the lower layer is connected with the water outlet header. The heat exchange tube 2 is made of a metal material that is resistant to acid and alkali corrosion and has good thermal conductivity, and the heat storage chamber wall 4 and the heat preservation shell can be made of high-strength industrial plastics.

The wall 4 of the heat storage bin is provided with an insulation layer 7 and a shell 5. Both the wall 4 of the heat storage bin and the shell 5 adopt a streamlined structure design, which is an arc structure. surface to reduce heat loss as much as possible. When the sunlight is sufficient, the heat absorbing plate 3 absorbs heat to heat the heat exchange tube 2, and at the same time conducts excess heat to the heat storage medium 6. As the heat of the heat storage medium 6 continues to increase, the sodium sulfate decahydrate is heated and becomes liquid, which is stored Abundant heat; when the sunlight is insufficient or at night, sodium sulfate decahydrate will transform from high temperature to low temperature, liquid to solid, and release the stored heat to complete the heat supplement to the fluid water in the heat exchange tube 2.

Claims (4)

1. A new type of heat storage collector, including a shell, a transparent cover plate, a heat exchange tube, a heat absorbing plate, a heat storage medium warehouse and an insulation layer, characterized in that: the heat storage medium warehouse has a larger specific heat capacity Heat storage medium: the heat exchange tube is U-shaped bent, passes through the heat absorbing plate and is located on both sides of the heat absorbing plate, the upper heat exchange tube is connected to the upper surface of the heat absorbing plate, and the lower heat exchange tube is arranged below the airtight heat storage medium Pass through the middle of the warehouse. 2. The novel heat storage collector according to claim 1, characterized in that: the heat storage medium is any one of sodium sulfate decahydrate, paraffin, and calcium chloride hexahydrate. 3. The novel heat storage collector according to claim 1, characterized in that: the heat absorbing plate is coated with selective absorption coating chrome black. 4. The novel heat storage collector according to any one of claims 1 to 3, characterized in that: the heat storage medium bin and the outer shell adopt a streamlined structure design with an arc-shaped cross-section.

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