Choose the materials around you, make a solar cooker by yourself, and talk about how you improve the working efficiency of the solar cooker.

Summary of manufacturing methods of 3KW solar furnace;

1, choice of condenser:

Due to different application fields, solar cookers have different types of reflective surfaces. At present, there are two kinds of reflecting surfaces: single focal spot paraboloid and double focal spot surface. The biggest difference is that paraboloid has no astigmatism correction function and needs to be equipped with complex tracking mechanism, so the comprehensive cost is very high. The solar cooker equipped with double focal spot condenser has the characteristics of simple structure, convenient operation and low maintenance cost, and the spot temperature is between 500 ~ 3300℃, which can be widely used in Stirling power generation.

2, the design of solar furnace:

A complete solar furnace has a condenser mirror, a movable heat absorbing plate, a heliostat bracket, a vertical bracket, an adjusting handle and a moving track of a heat storage furnace, and has a simple structure.

The most critical step of a set of solar cookers with excellent performance is the design of double focal spots, which directly determines the thermal efficiency and structural complexity of the solar cooker. Bifocal plane is a two-dimensional condensing plane with different vertex curvatures in meridian plane and sagittal plane. Therefore, it is necessary to design the off-axis rotating bus with aspheric formula, and then optimize the curvature to make it have the maximum astigmatism. In this process, it is necessary to simulate the design parameters.

Then enter the process of making glass molds. The glass forming method can meet the requirements of design curvature by hot bending or micro-tempering. The mold error is less than 0.0 1 mm, and the specific formula and oblique cutting diagram are as follows:

Non-standard materials such as brackets and mirrors need to be processed on site according to the size of the reflector. Another key is that the regenerative furnace is special and needs to be ordered from the unit.

3. Processing of double focal spot reflector;

The mirror surface is generally made of ultra-white glass with a thickness of 2-4 mm, and the reflective material is generally made of highly reflective silver or aluminum, so that the reflective film can reach more than >: 85%, and the back of the mirror surface needs three protective layers to make its service life reach more than 20 years.

4, installation and debugging:

Solar ovens smaller than 10KW can be basically completed in the production process, but solar ovens larger than 10KW need to be carried out in the construction site due to the structure of the secondary condensing and reflecting mechanism.

The above method simply describes the more formal production process. If you need a simple solar furnace product, you can use the patch method to treat the reflecting surface, and the effect is also very good. You are free to choose.