Designing and Analysis of an Earth Air Heat Exchanger using CFD

One of the real objectives of current innovation is to change vitality framework to diminish unfriendly ramifications on biological system. Earth air cooling is a decent choice for sparing vitality by diminishing the electrical utilization, water use and for lessening outflows; contrasted with customary cooling strategies. Earth air heat exchanger (EAHE) utilizes temperature slope among earth and air to cool the air and to supply this precooled air to the structure. Perceptions demonstrate that the ground temperature beneath a specific profundity remains generally steady consistently. This is because of the way that the temperature vacillations at the outside of the ground are lessened as the profundity of the ground expands as a result of the high heat latency of the soil. Likewise, there is a period slack between the temperature changes at the surface and in the ground. Thus, at an adequate profundity, the ground temperature is constantly higher than that of the outside air in winter and is lower in summer. This temperature slope between the ground and surrounding air can be utilized for fluctuating the states of air before it goes into the room. Pipes are covered somewhere down in the ground and when the air went through these pipes, air is warmed/cooled by the temperature difference between the air and ground. This framework is called Earth Air Heat Exchanger (EAHE) framework. In this paper, a model of the framework was created in ANSYS ICEM programming to foresee the cooling limit of earth air heat exchanger. The model was broke down utilizing ANSYS FLUENT reenactment program. The reenactment results gotten by utilizing computational fluid dynamics (CFD) device is approved utilizing experimentation done on a test setup. Great understanding between the exploratory perceptions and mimicked results are obtained. The model talked about in this paper is made of 0.7 m long PVC pipe with 0.075 m distance across. Experimentation done on the model demonstrates a temperature drop of 1.90C – 3.20C at a stream speed of 2.5m/s through the cylinder when the temperature distinction among soil and encompassing air was 10.9 - 20.20C separately. The impact of working parameters on the EAHE framework by differing the pipe breadth, speed of wind current and pipe length is likewise examined in this paper.