Heat energy accounts for the extent of internal thermal energy possessed by the body and depends upon the temperature and the mass of the body. The basics of solar thermal energy lies in five principles namely heat gain, heat transfer, heat storage, heat transport, heat insulation. Storage of solar energy makes it possible to benefit from it in the absence of sunlight also.
Heat gain is the measure of the heat in the system collected from the sun. Greenhouse is used to collect the heat energy from the solar radiation which employs greenhouse effect. The greenhouse effect is the capability of the reflective surface of allowing short wave radiations while reflecting long wave radiations. When sunlight strikes the absorbing surface it is, there and then, entrapped in the collector. Absorber tubes, filled with fluid like water, are used to entrap heat energy and transmit it to the heat storage vault.
Conduction or convection transfers heat energy. In heated water, water molecules get kinetic energy by conduction process in the medium. Owing to possessing thermal energy hot molecules occupy more space than cold slow moving molecules which are above them. Because of convection process the hot water molecules rise up and cold water molecules sink down thus being accounting for the throughout spreading of energy. From the absorber plates of the collector, energy is conveyed by conduction. Delivery pipes circulate the fluid from the collector and take it to heat transfer vault where it is distributed all over the medium by convection process.
Solar thermal power units store the heat energy thus producing electrical energy during night time and when the weather is overcast. During sunlight the heat is transmitted to the thermal storage medium which is benefited from during hours lacking natural sunlight. Temperature differences as well as conduction and convection directly affect the rate of heat transfer. The larger the temperature difference, the faster will be the heat transfer.
The process of heat energy transfer, from solar collector unit to the heat storage vault, is known as heat transport. In both the heat transport tubing and the storage vault, heat insulation is imperative which minimizes heat loss, which is in line connected to energy loss, or downfall in the system efficacy.
Heat gain is the measure of the heat in the system collected from the sun. Greenhouse is used to collect the heat energy from the solar radiation which employs greenhouse effect. The greenhouse effect is the capability of the reflective surface of allowing short wave radiations while reflecting long wave radiations. When sunlight strikes the absorbing surface it is, there and then, entrapped in the collector. Absorber tubes, filled with fluid like water, are used to entrap heat energy and transmit it to the heat storage vault.
Conduction or convection transfers heat energy. In heated water, water molecules get kinetic energy by conduction process in the medium. Owing to possessing thermal energy hot molecules occupy more space than cold slow moving molecules which are above them. Because of convection process the hot water molecules rise up and cold water molecules sink down thus being accounting for the throughout spreading of energy. From the absorber plates of the collector, energy is conveyed by conduction. Delivery pipes circulate the fluid from the collector and take it to heat transfer vault where it is distributed all over the medium by convection process.
Solar thermal power units store the heat energy thus producing electrical energy during night time and when the weather is overcast. During sunlight the heat is transmitted to the thermal storage medium which is benefited from during hours lacking natural sunlight. Temperature differences as well as conduction and convection directly affect the rate of heat transfer. The larger the temperature difference, the faster will be the heat transfer.
The process of heat energy transfer, from solar collector unit to the heat storage vault, is known as heat transport. In both the heat transport tubing and the storage vault, heat insulation is imperative which minimizes heat loss, which is in line connected to energy loss, or downfall in the system efficacy.
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