Система отопления с тепловым насосом и солнечным коллектором
2010
Mitina, I.V., All-Russia Research and Development Inst. of Electrification of Agriculture, Moscow (Russian Federation)
Some heating systems comprising solar collectors and a heat pump have been considered. The operation of a compression heat pump is described. It is observed that the higher is coolant evaporation temperature, the more is the operation efficiency of the heat pump, that's why heat pump better operates in pair with solar collector that is used to heat the coolant when evaporated. A comparative analysis of the heating systems with a heat pump and heating systems comprising a heat pump and solar collector was conducting using modeling. It has been experimentally found that the heat pump in pair with solar collector gives a greater conversion coefficient than without them. The greatest conversion coefficient of heat pump is in the system when the solar collector functions as a coolant evaporator. As the evaporation temperature increases, the conversion coefficient of heat pump grows, the efficiency of the solar collector declines. In case of the heating system with solar collector and heat pump, the collector inlet temperature can be lower than the ambient temperature. In the North range the conversion coefficient of heat pump in heating systems with solar collectors is not high even when a great area of solar collector is used: heat losses into environment are great, as the temperature of ambient air in the heating period is low, the arrival of solar radiation is not high.
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