An Absorption Refrigeration System Used for Exploiting Mid-Low Temperature Geothermal Resource

Abstract

An absorption refrigeration system used for exploiting mid-low temperature geothermal resources is described, in which a two-stage LiBr/H2O absorption chiller driven by hot water is the core technique. The refrigeration system is driven by a low-temperature hot source and consists of an evaporator, a low-pressure absorber, a low-pressure generator, a high-pressure absorber, a high-pressure generator, a condenser, a low-pressure heat exchanger, and a high-pressure heat exchanger.

This refrigeration system can reduce the geothermal water of above 70C to 60C. Experimental data indicated that the COP of this chiller ranges from 0.38 to 0.42 with heat source temperature of 63-65C. Compared to the traditional air-conditioner, implementation of this system reduces power consumption by 62%, and the payback period of the investment is less than four years. This system has a high value of practice and a great deal of market prospect.