A comparative CFD analysis of EAPHE System using different pipe design and varying velocities
One of the problem in EAPHE system is the large installation area required for the straight or U shaped conventional configurations. Due to the large installation area required, EAPHE system is not suitable for densely populated country like India. In the present study a CFD based study is carried out on EAPHE System where three different designs of air pipes with varying velocities 5m/s, 10m/s and 12m/s were used to establish a relationship between the temperature drop and velocity parameters. Also, a relation between velocity and Nusselt number has been established in this study. CFD-based signal processing modeling is worked out to refine the parameters of the Earth Air Pipe Heat Exchanger (EAPHE) device in the context of a drop in temperature and temperature distribution. The CFD statement is based on ANSYS FLUENT 15.0, with k-ε and power exponential function used to categorize temperature difference and vibration occurrences. In the overall study it is found that EAPHE system with air velocity of 5m/s shows better performance. Also among the three design of pipes EAPHE system with helical shape pipe showed the better performance with respect to the less installation area required.