Numerical investigation of chlorinated polyvinyl chloride pipe earth air tunnel heat exchanger at different pipe diameter

摘要

In this work steady state model based on computational fluid dynamics has been developed to predict the thermal performance and cooling capacity of earth to air heat exchanger systems. The model was developed inside the ANSYS fluent simulation program. The model developed is validated to experimental set-up. A thermal model was developed to analyze thermal energy accumulated in soil/ ground for the purpose of room cooling of buildings. This analysis has been carried out for hot and dry climate of Bikaner region western part of Rajasthan, India. The earth to air heat exchanger model consists of 20 m length of helical chlorinated polyvinyl chloride pipe. The diameter of chlorinated pole venial chlorite pipe is 0.07m, 0.09m, 0.11m, 0.13m, 0.15m, 0.17m and 0.19m respectively has been selected for the investigation of earth to air heat exchanger foe cooling of building. Thickness of chlorinated polyvinyl chloride pipes is 0.002 m and velocities of air 7m/s. It is concluded that temperature reduction is more in 0.07m diameter of chlorinated pole venial chloride pipe and also it is found out that increase in mass flow rate will result in decrease in outlet temperature.