HEAT PUMP SYSTEM OF HOT WATER SUPPLY AND AIR COOLING BASED ON THE INTEGRATED ENERGY OF COLD WATER AND AIR FLOWS

With the increasing cost of traditional fuel and energy resources all over the world, the problem of significantly increasing the efficiency of heating and cooling systems for buildings for various purposes with the improvement of environmental performance based on the use of new and improvement of traditional renewable and secondary low-temperature sources becomes relevant. Based on the results of the analysis of known developments of heat and cooling supply systems and methods of their calculation, the authors justified an improved version of the system in which the low-temperature source is source water, removed and supply ventilation air. The subsystem of two-level hot water supply with air cooling of premises in the warm period of the year of civil buildings located in the Southern regions of Ukraine was considered. On the basis of analytical study of heat and energy efficiency of the improved heat pump system of hot water supply and air cooling, the dependence of the actual conversion factor has been established, which represents a multifactor interrelation of initial and mode parameters, as well as modes of operation of structural subsystems of selection, conversion and subscriber heat consumption. Mode conditions are determined that ensure highly efficient heat recovery from cold water and ventilation air for hot water supply in the building and its cooling in the warm period of the year. The results of the analytical study have established the feasibility of using cold water and ventilation air as an integrated low-temperature source in the proposed system of heat and cold supply. The conversion efficiency of energy flows significantly exceeds similar values in traditionally applied systems, for example, with a characteristic low-potential source in the form of soil. Bibl. 25, Fig. 5.