Abstract
Reducing the temperature of the working fluid in the electric generation systems (gas turbine air inlet as well as steam from the steam turbines) requires an effective cooling medium The present work is a part of a research project conducted in the Islamic University of Madinah, Saudi Arabia, to present reasonable solutions to pre-cool the inflow air to the air-cooled condensers in electric generation systems in KSA, when the ambient air temperature increases above the design air inlet temperature. An extensive amount of measurements has been carried out to investigate the effects of soil parameters on a buried earth-air heat exchanger. Among many parameters, the current research focused on investigating the effects of soil moisture contents and degree of compaction-represented by relative density-on the thermal performance of the buried heat exchanger. Results of the study show that; an average daily basis, a significant induced air temperature drop of 23.5 °C is achieved at the soil moisture content of 30 % and soil compaction of 91.17 %. Furthermore, the effectiveness of considered BEAHE is increased by about 33.34 % when the soil compaction is increased from 26.47 % to 91.17 %.
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