Аннотация:This paper reports the results of study on the effectiveness of using low-grade ground heat in heat pump
systems under the climatic conditions of Russia. The study was performed using the software package
"INSOLAR.GSHP.12", which simulates the non-stationary thermal conditions of ground source heat pumps (GSHPs)
over several years of operation. The paper presents the results of the zoning of the territory of Russia according to the
effectiveness of using low-grade ground heat in heat pump systems. The zoning was performed with consideration of
the decrease of the soil temperatures over several years of heat collection system operation. The soil temperatures
expected on the fifth year of operation were considered to be the design temperatures.The described study was
performed with the financial support of the Ministry of Education and Science of Russia. Contract ID
RFMEFI57914X0026.