An intense review on the latest advancements of Earth Air Heat Exchangers

Energy saving is a vital element in today's scenario. Earth Air Heat Exchangers (EAHE) is a technique that promotes energy savings. EAHE is a non-conventional technique that uses the earth's underground heat for space cooling/heating. In this article, review of different combinations of EAHEs is presented. The review presents an apprehensible summary of the previous works on EAHE. The review addresses an elaborated description of the analytical and experimental studies on the different combination of EAHE and analyses the results from the thermal performance. It also consider the environmental aspect in the field of energy saving. It is concluded from the summary that the design parameters directly or inversely affect the outlet temperature. The result also shows that the pipe materials does not have much influence on the outlet temperature. In the case of energy saving, EAHE technology saves more energy that can replace the conventional air conditioning systems. Thus, this technology can effectively reduce the greenhouse gases and improve the environment.