ТЕПЛОМАССООБМЕННЫЕ ПРОЦЕССЫ В ИСПАРИТЕЛЬНОМ БЛОКЕ ВОЗДУШНОГО ТЕПЛОВОГО НАСОСА

Abstract

Heat pump installations and the possibility of their application in engineering systems are considered. This allows expanding significantly the possibilities of using renewable energy sources, as well as waste heat from various technological processes in engineering systems for creating a microclimate. Air heat pumps are the most promising, but their use in regions with a cold climate is limited due to condensation of moisture vapors on the cooling line of the evaporation unit with subsequent formation of ice, which reduces the efficiency of the installation. In this paper, an upgraded evaporative unit of an air heat pump with a MOVEBIT ice removal system is considered. Taking into account the design of the heat exchanger, which includes a magnetostrictive radiator unit, the influence of heat and mass transfer processes in the evaporation unit on the efficiency of the heat pump unit in a wide range of outdoor temperatures is considered. A criterion equation has been obtained for calculating the heat transfer coefficient in the evaporation unit depending on the hydrodynamic conditions of the process and the thermophysical parameters of the air environment. This equation allows to calculate the heating capacity and cooling capacity. In addition, to determine the coefficient of energy transformation of a heat pump installation at all stages of the life cycle of engineering systems. The dependence of the influence of temperature and relative humidity on the kinetics of ice formation is obtained. This provide calculation the operating time of the installation between the cycles of switching on the radiator to destroy the ice. Based on the research results, computer programs have been developed for controlling the main thermal parameters of an air heat pump with a MOVEBIT system and an electrical part of a magnetostrictive radiator in a wide temperature range.