Increasing the efficiency of ground-source heat pumps based on consumer operating mode data
DOI:
https://doi.org/10.15276/opu.1.71.2025.12Keywords:
geothermal heat pumps, heat supply systems, renewable energy sources, heat accumulators, heat consumption modes, generatorsAbstract
The introduction of renewable energy sources into the municipal heat power generation heat supply systems corresponds to modern policies of transition to "green energy" and decarbonization of both industry and various branches of power engineering. This study analyzes modern practices of heat pumps integration to autonomous heat supply systems with heat removal from the ground, identifying the main difficulties in geothermal heat pump systems implementation and operation. Based on the resulting analysis, a relevant direction of research on increasing the efficiency of autonomous heat supply systems based on geothermal heat pumps has been identified. To analyze the heat supply systems operation, a mathematical model has been selected that allows describing the processes of heat supply of various types of consumers with reference to the operation of a heat supply system based on geothermal heat pumps and heat accumulators. Experimental studies of the operation of a heat supply system based on a heat pump for the first heating season were conducted for a separate facility. Based on the data obtained, a generalization of the consumers’ operating modes depending on the 24-hourly period sector and ambient temperature has been carried out. The relevance of adjusting the operating modes of the heat pump installation was proven based on the experimental data obtained for the first period of system operation. The generalized data on the geothermal heat pumps operation allowed us to propose a solution to increase the heat supply system energy efficiency and the reliability of the heat generation system main elements. Mathematical modelling of the heat supply system operating modes in the facility based on geothermal heat pumps during the day was carried out, taking into account the available data on the main heat consumers’ operating mode. A pulsed mode of heat generation by heat pumps was proposed. Based on the obtained simulation results, a diagram of the heat supply system operation during the day was obtained. To equalize the operating modes of heat generators, the use of heat accumulators capable of reducing the heat pumps’ maximum calculated heat load during consumption peaks and ensuring the minimum needs of consumers during heat load declines was proposed.
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