A COMPREHENSIVE REVIEW ON HORIZONTAL EARTH AIR HEAT EXCHANGER

Abstract

Earth air tunnel heat exchanger, it is known that the thermal performance of earth air tunnel heat exchanger system is dependent upon several parameters like inlet air velocity, tube length, tube inner diameter, tube thickness, tube material, climate conditions and highly dependent upon thermo-physical properties of ground soil. Since the thermal performance of earth air tunnel heat exchanger is highly dependent upon thermo- physical properties of ground soil, so the ground soil having lower thermal conductivity requires much longer tubes for the desirable heat transfer in between the air and earth soil. Thus for installing the earth air tunnel heat exchanger, space limitation is the major problem for obtaining the desirable results. In highly populated country like India earth air tunnel heat exchanger is no more used for air-conditioning purpose due to space limitation problem and it is also giving limited cooling effect depending upon climate conditions. Therefore in this Dissertation Work, above two major problems were analyzed carefully. Thermal performance of EATHE is more effective for summer season as compare to winter season.