A comparative CFD analysis of EAPHE System using different pipe design and varying velocities
Abstract
Abstract
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.