2. The cold working medium entering from the bottom of the collector is heated by solar energy in the fluid channel, and the temperature gradually rises. The heated hot working medium with useful heat energy is discharged from the upper end of the collector and stored in the water storage tank for later use, which is a useful energy gain.
3. When the temperature of the heat absorber rises, it radiates heat to the environment through the transparent cover plate and the shell, which constitutes various heat losses of the flat solar collector.
Flat solar collector is the basic component of solar low-temperature heat utilization, and the water heater composed of flat solar collector components is flat solar water heater.
Extended data
Advantages of flat solar collectors:
1, especially suitable for combination with buildings. Because of its plane structure, flat solar water heater is flexible in shape and structure in the application of solar energy and building, and it is not limited by shape or size when designing, so it is easy to be combined with building components.
2. It has high thermal efficiency. The flat solar collector is a continuous plane, and the whole surface of the collector receives sunlight at the same time.
3. It has good pressure-bearing performance. Because the heat absorption plate of the flat solar collector is made of metal material, and the connection between the collector and the water storage tank is also made of metal parts, it can withstand the pressure from tap water and circulating pump.
Baidu encyclopedia-flat solar collector