Cold accumulation as a method of energy saving and optimization of energy consumption
UDC 621.58: 536.75
Arkharov A.M., Leontyev A. I., Sychev V. V., Arkharov I. A., Krizhanovskaya E. N., Kustov P. V.
Abstract
The problem of cold accumulation, important for many industries, is considered in terms of its interest for large consumers of cold in the field of moderate low and cryogenic temperatures. Cold generators for these conditions can be air refrigerating machines (VHM) or vapor-compression Freon (R22) refrigeration machines (PKM). The calculations of energy consumption for VHM and PKM are presented for the conditions of cold accumulation, and an entropy-statistical analysis of work loss distribution in the elements of machines for stationary operating conditions is given. The actual work values calculated by analysis differ from those, determined in the refrigerating cycles, by about 1 %. The cost of production of 1 kg of ice is considered in both cases for all-day operation of the plants and for night operation in the conditions of different electrical energy tariffs in Moscow. A threshold temperature has been determined, below which the use of VHM is appropriate for the accumulation of cold. It's 60 °C, however in the case of combined operation (PKM all day and BHM in night time) this threshold is increased to -30 °C.
Cold accumulation as a method of energy saving and optimization of energy consumption
Abstract
The problem of cold accumulation, important for many industries, is considered in terms of its interest for large consumers of cold in the field of moderate low and cryogenic temperatures. Cold generators for these conditions can be air refrigerating machines (VHM) or vapor-compression Freon (R22) refrigeration machines (PKM). The calculations of energy consumption for VHM and PKM are presented for the conditions of cold accumulation, and an entropy-statistical analysis of work loss distribution in the elements of machines for stationary operating conditions is given. The actual work values calculated by analysis differ from those, determined in the refrigerating cycles, by about 1 %. The cost of production of 1 kg of ice is considered in both cases for all-day operation of the plants and for night operation in the conditions of different electrical energy tariffs in Moscow. A threshold temperature has been determined, below which the use of VHM is appropriate for the accumulation of cold. It's 60 °C, however in the case of combined operation (PKM all day and BHM in night time) this threshold is increased to -30 °C.
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