Light and heat utilization: It collects solar radiant energy and converts it into heat energy through interaction with matter for use. At present, the most commonly used solar water heater collectors include three types: flat plate collectors, evacuated tube collectors, and focused collectors. Solar water heater power generation: The large-scale utilization of solar water heater in the future will be used to generate electricity. There are two main ways to use solar water heaters to generate electricity:
① Light-heat-electric conversion. That is, the use of heat generated by solar radiation to generate electricity. Generally, a solar water heater is used to convert the absorbed heat energy into steam of the working fluid, and then the steam drives the gas turbine to drive the generator to generate electricity. The former process is light-heat conversion, and the latter process is heat-electricity conversion.
②Optical-electrical conversion. Its basic principle is to use the photovoltaic effect to directly convert solar radiant energy into electrical energy, and its basic device is a solar water heater battery.
