What is the difference between the solar-thermal power generation and solar photovoltaic power generation?

Solar photovoltaic (pv) is the use of the principle of photovoltaic effect to power generation, photovoltaic cells including polycrystalline silicon, monocrystalline silicon, amorphous silicon thin-film batteries and other types. Solar-thermal is the heating effect of the use of solar energy to generate electricity or produce hot water, major

solar pv electricity generation by using principle of photovoltaic effect. Photovoltaic cells including polycrystalline silicon, monocrystalline silicon, amorphous silicon thin-film batteries and other types. Solar-thermal is the heating effect of the use of solar energy to generate electricity or hot water, mainly by focusing on solar energy and generate heat, and finally promote the turbine to generate electricity. Solar thermal power generation refers to convert solar energy into heat energy first, and then convert heat into electricity. There are two kinds of transformation patterns: one way is solar thermal power generation, it will direct solar heat energy into electricity, such as semiconductor or metal material of thermoelectric power generation, vacuum devices of power generation, alkali metals ions and hot ions thermoelectric conversion, MHD power generation, etc. Is another way of solar thermal, which USES the radiation energy collecting device to collect the sun's radiation energy, heating medium ( Also known as heat transfer medium) Transfer heat energy to do work, and use medium, a generator to produce electricity. Solar-thermal power generation technology research and development began in the 1950 s. Its generating principle similar to the traditional thermal power generation, is it the heat energy comes not from the fuel, but from solar energy. Solar-thermal power generation system can be divided into four subsystems: integrating subsystems of heat, heat transfer and heat storage subsystems of heat and power generation. Solar-thermal power generation is a convert light energy into heat energy, then using the traditional thermodynamic cycle power generation technology. Solar-thermal power generation produces alternating current (ac), the same as the traditional thermal power generation. It with the traditional power generation method and the existing grid has good matching, and can be directly connected to the Internet. Solar photovoltaic power generation using solar battery technology. Photons to form electronic jump potential difference, converts light energy into electrical energy to produce direct current (dc). One of the most important difference between both lies in their different ways of energy storage. Energy storage to make up for the intermittent and power grid peak shaving capability of solar power is of great significance. Because of photovoltaic power generation by the light energy into electrical energy directly, its remaining energy only by storage batteries, its technical difficulty and the cost is far greater than just need to store heat solar-thermal power generation. Therefore, it is easy to store excess energy in order to realize the continuous and stable power generation and load power generation, it was relatively light volt solar thermal power generation is one of the most important and the most obvious advantage. Solar-thermal power generation and photovoltaic each have advantages and disadvantages, have their own application domain. Solar-thermal power relatively large scale and scale of photovoltaic power generation is relatively small, suitable for families, residential area, etc. , including with the combination of buildings. Therefore, the applicable scope is not exactly the same. Solar-thermal power generation is mainly used for centralized power generation, solar photovoltaic power generation is mainly used in distributed generation. Solar thermal and solar photovoltaic (pv) each have advantages and development prospects, there is no direct conflict between them. A relatively good place in solar energy development, should also have a solar-thermal power generation systems and photovoltaic power generation system, so in the long run, the two are complementary. In the future, both will share the future energy consumption pattern.