期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2017
卷号：6
期号：7
页码：15306
DOI：10.15680/IJIRSET.2017.0607362
出版社：S&S Publications
摘要：For the transient operating conditions derating factor is used to evaluate deterioration of Earth AirTunnel Heat Exchanger’s thermal performance. Derating factor depends upon soil’s thermal conductivity, duration ofcontinuous operation and the pipe length. Collection/rejection of heat from pipe to nearby sub soil is one the majorproblem in operating earth air tunnel heat exchanger because it alters the soil temperature which have adverse effect onthe thermal performance of EATHE system with time. Hence the efficiency of EATHE system greatly depends uponextent of thermal saturation and the time required for self-recovery of soil around the buried pipe. Problem of deratingfactor are more severe with the soil having poor thermal conductivity.
