Thermal Energy Supply of Residential Districts with Thermal Pumps and Solar Power Stations
Petrosyan A. L.

Thermal energy supply of residential buildings with the help of thermocompressor heat pumps using solar energy as a low temperature heat source have a great disadvantage of requiring considerable surfaces of solar collectors and electric capacities thus resulting that high-power energy consumption.Within daytime and favorable weather conditions solar power plantserves as a source of electricity generation as it is shown in the suggested technological scheme. In order to increase the energy index of the plant it is recommended to use low evaporating temperature refrigeration agents as operating body which will first be evaporated in solar collectors then will be expanded in turboexpanders. As a result the condensing heat will be used in heat pump evaporator wich will make it possible to combine solar power plant condenser with heat pump evaporator. The process of modification of solar power plant thermal energy conversion efficiency in accordance with the increase of evaporation and overheating temperature in operating body and vacuum reflector solar collector surface size modification for the purpose of supplyingspecific electric powercorresponding 1 kilowatt total heat heat demandin solar power plant turboexpander was considered for climatic conditions in Yerevan. Different types of frons have been considered as operating body. R114 and R 22 have better characteristics of which practical application may have R 22 , since it is actually possible to organize production of low-power and quantity turboexpanders. Since this factor is one of the main and currently the production of turboexpanders with methane and benzobutane is organized in Russia consequently technical capability of application of R600 a has also been considered. In the proposed scheme during the remaining hours and days of the year when the application of solar power plant is inexpedient it is supposed to use gas cogeneration station which simultaneously provides part of the heat energy requirement of the region.

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