Analysis of the efficiency of energy supply systems of multi-apartment residential buildings with heat pumps

Abstract

Purpose. To assess the efficiency of the operating modes of heating systems in multi-apartment residential buildings, taking into account actual changes in outdoor temperatures during the heating season and investigate the regularities of the formation of temperature schedules of building energy supply systems and the features of the operating modes of bivalent heat supply systems using heat pumps and electric heaters. The methods. The efficiency of temperature schedule utilization in residential building energy supply systems was modeledusing statistical data analysis, which made it possible to identify the dependence of the seasonal coefficient of performance(SСОР) on the ambient temperature parameter. Findings. An analysis of the operating range of heat pumps was carried out for different temperature schedules of the energy supply of a residential multi-apartment building in the city of Dnipro. As a result of the modeling, regularities of changes in the energy conversion efficiency coefficient from the external air temperature parameter were established, which allows us to estimate the SСОРof heat pumps for the heating period when using different types of temperature schedules and determine the most appropriate method of using systems with heat pumps. The originality. The regularities of the change in the seasonal coefficient of energy conversion efficiency SCOP from the parameter of the external air temperature for different temperature schedules of the operation of the bivalent energy supply system of multi-apartment residential buildings based on a heat pump and an electric heater were established. The efficiency of the operation of heat pumps of different types was estimated at the averaged actual values of the ambient temperature during the heating season. Practical implementation. The obtained modeling results can be used when selecting the parameters of the energy supply systems of residential multi-apartment buildings for the rational choice of the operating mode.