Two-Stage Heat Pumps for Energy Saving Technologies

The problem of energy saving becomes one of the most important in power engineering. It is caused by exhaustion of world reserves in hydrocarbon fuel, such as gas, oil and coal representing sources of traditional heat supply. Conventional sources have essential shortcomings: low power, ecological and economic efficiencies that can be eliminated by using alternative methods of power supply, like the considered one: low- temperature natural heat of ground waters on the basis of heat pump installations application. The considered heat supply system provides an effective use of two stages heat pump installation operating as heat source at ground waters during the lowest ambient temperature period. The calculation method of heat pump installations on the basis of groundwater energy is proposed. The values of electric energy consumption by the compressors' drive, and the heat supply system transformation coefficient µ for a low-potential source of heat from ground waters allowing to estimate high efficiency of two stages heat pump installations are calculated.