Thermodynamics in a solar water heater refers to the transfer and conversion of solar energy into heat, primarily through conduction, convection, and radiation. Heat is transferred from the solar collector to the water through these processes, raising its temperature.
Detailed explanation:
1. Absorption of solar radiation:
The solar collector, usually a flat plate, absorbs the sun's radiant energy.
2. Conduction:
Heat is transferred from the collector's metal parts to the water through conduction.
3. Convection:
The hot water, being lighter, rises, which propels the cold water toward the heating zone. This process is known as thermosiphoning.
4. Radiation:
The solar water heater components, such as the collector, also emit heat through radiation.
5. Heat storage:
The heated water is stored in a tank, ready for use. In short, the thermodynamics of a solar heater involve the absorption of solar energy, heat transfer through conduction and convection, and heat emission through radiation, all to raise the temperature of the water.
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