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Solar collectors can generally be divided into flat-panel collectors, concentrating collectors and flat mirrors and several other types.
Flat-panel collectors are generally used in solar water heaters and the like. Concentrating solar collectors can make high-temperature focus, the focus can be dotted or linear, for solar power plants, housing heating (heating) and air conditioning (air conditioning), solar furnaces. According to the condenser structure with "Fresnel" lens, parabolic mirror and heliostat.
Flat reflectors are used in tower solar plants with tracking equipment and are typically used in conjunction with parabolic mirrors. Plane mirror to focus the sun reflected in the parabolic mirror, parabolic mirror to focus.