Product Specifications

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Product Description

The solar power cooker is the core product of JDSOLAR and has a wide range of applications.

The mirror design of solar cookers mostly uses the principle of concentrating parabolic projection.In mathematics, if the parabola rotates around the main axis for one week, the resulting surface is called a "rotation paraboloid." If a parallel beam of light is directed toward the paraboloid along the main axis, and the parabola is reflected, the light will be concentrated and reflected to the fixed point, thus forming a concentrated light, or "focusing" effect. As a solar cooker, it is required to form a focal plane at the bottom of the pot to achieve the purpose of heating. In other words, it does not require that the sun be concentrated to a point, but rather a certain focal plane. After determining the focal plane, it is not difficult to study the concentrating ratio of the concentrator, which is an important factor in determining the power and efficiency of the concentrating solar cooker. The concentration ratio K can be obtained by the formula: K = lighting area / focal plane area. The lighting area refers to the effective projected area of the mirror surface sunlight when the solar cooker is in use. According to the experience of promoting solar cookers in China, a concentrating solar cooker with a power of 700 to 1200 watts is designed, usually with a lighting area of about 1.5 to 2.0 square meters. Individual large-scale steam solar cookers are also concentrating solar cookers, but their lighting area is large, and some should be more than 5 square meters.The rotating parabolic concentrating mirror is incident on the main axis according to the sunlight, so it often leaves a shadow when passing the pot on the focus, which reduces the reflection of sunlight and directly affects the power of the solar cooker. Most of the solar cookers in China are designed with off-axis focusing.

In addition to the rotating parabolic mirror, the concentrating solar cooker also has a mirror that divides the paraboloid into several segments, which is optically called a Fresnel mirror, and also has a Fresnel mirror made into a continuous spiral reflective strip. , commonly known as "mosquito-type solar cooker." These types of stoves are collapsible portable solar cookers. The mirror surface of the concentrating solar cooker is formed by integral hot bending of the glass, and is also pasted on the designed bottom plate by ordinary glass lens pieces, or pasteed on the bottom plate with a high-reflectivity aluminum-plated polyester film. The bottom plate can be made of cement or formed by using iron or calcium plastic materials. It can also be directly polished with an aluminum plate and coated with an anti-oxidant to make a mirror. The frame of the concentrating solar cooker is bent with metal pipe, the height of the pan should be moderate and easy to operate, and the elevation angle of the mirror can be flexibly adjusted. For the convenience of movement, it is also possible to install two small wheels at the bottom of the frame, but the stability of the body must be ensured. In windy places, the solar cooker should be able to resist the wind. A windshield can be installed at the bottom of the pot to reduce the power loss of the bottom of the pot due to the influence of wind. Some solar cookers are equipped with a tracker that automatically tracks the sun, but it is generally believed that this will only increase the cost of the whole stove. Some concentrating solar cookers promoted in rural China. Most of them are cement casings with glass mirrors, which are low in cost and easy to produce on site, but are not conducive to industrial production and transportation.

The focal point of the solar cooker is the most important component of the solar cooker. It can be made of organic, inorganic, metallic or non-metallic materials.

Type of JDSOLAR solar cookerThe first type: outdoor solar cooker

This solar cooker can only be used for outdoor cooking and cooking. It was promoted by local governments in China in the 1970s. The advantage is that it can obtain solar high temperature and save fuel. The production cost is suitable for the living standards of the farmers at that time, and its shortcoming is manual operation, which is extremely inconvenient. Generally only manual operation, can only cook outdoors, low weight, can meet the needs of individual family life. Due to the extremely low cost, this solar cooker is still in use in many places.

Second: Fresnel lens focusingThe advantages are extremely obvious and the focusing accuracy is high. It is a sheet-like plastic material that is light and has good performance. It is one of the best ways to focus on solar energy today, mainly for solar power generation. However, its disadvantage is that the cost is very expensive and the technical requirements are high.

The only manufacturers that can produce large Fresnel lenses in China are JDSOLAR, and all products are exported. The cost is very expensive. A Fresnel lens within one square is priced at more than one thousand yuan. Even in Europe and America, a two-square Fresnel lens is about RMB 6,000. Due to the high cost, users are often discouraged, which makes the production capacity of Chinese Fresnel lens manufacturers inhibited by the price and consumer market.

Third: fixed focus solar cooker

The fixed-focus solar cooker is a new type of solar cooker developed by Chinese scientists after more than ten years of research and development. The utility model is characterized in that the concentrating heat collecting and the heat storage energy storage are divided into two different parts, and the concentrating structure is guided by the automatic tracker to make the pot concentrator always align with the sunlight and reflect along the ground axis direction to collect heat. On the bull's eye of the accumulator. The obtained high-energy photo-heat is converted to a collector.The advantage is that since the heat collecting and collecting light are divided into two different bodies, the collecting light is convenient, the power is small, the cost is low, and the energy storage part is on the target body, so the weight volume is not limited, and thus the fixed focus is Solar stoves can be used in collective canteens, high temperature heat collection, hot water projects, desalination and solar power generation. This technology has taken the lead in the world. It is also a new contribution made by Chinese scientists to solar energy utilization.

In addition, Chinese solar experts have developed a modular solar power generation system that can perform intensive production with unlimited production capacity, convenient processing, low cost and high efficiency. One component can emit one kilowatt of electricity to support any power generation system, which is unmatched by other solar power systems, which will certainly promote the development of China's solar industry. 

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