Design of a high temperature production heat pump system using geothermal water at moderate temperature

Geothermal water at moderate temperature in a range between 30 and 50 °C exists sparse in surroundings. Mostly they are utilized as heat or water source at spar zones in Korea. However, a large portion of used water is discarded due to its poor recovery quality and inferior application technologies. In this research, an innovative heat pump system based on the hybrid concept that combines compression cycle and absorption cycle was investigated mathematically. The hybrid heat pump aims to recycle various kinds of the heat sources at moderate temperature including geothermal water effectively. The prime objective of the simulation is to design a compression/absorption hybrid heat pump system which can make high temperature above the level of 90 °C and low temperature of 20 °C as well at the same using 50 °C geothermal heat water. As a result, primitive data was provided as a basis to design a prototype 3-RT class hybrid heat pump.