The solar mid-high utilization temperature system is developed by Huayuan New Energy Project Company who are direct by the institute of electrical engineering Chinese Academy of sciences and Tsinghua University. The equipment has simple structure, installs conveniently, and the whole service life is about 20 years. The company uses this technology to produce the solar hot water heater which is suitable for most area of China and may produce 100 centidegree hot water throughout a year. (if we use Fresnel line focusing technology, temperature also could to be higher, like200, 300centidegree using for industrial)