Potential reduction in water consumption of greenhouse evaporative coolers in arid areas via earth-tube heat exchangers

This study aimed to explore the potential of developing a novel cooling system combining greenhouse and an earth-tube heat exchanger (ETHE). In this system, air is circulated through underneath soil mass use deep-soil effect. was achieved following steps. First, temperature profile inside outside cultivated monitored for almost one year possibility using coldness air. Second, prototype ETHE built practically investigate reduction in as flows deep earth pipes. Third, erected concept. Results from first experiment revealed that at depth 2.5 m offers good conditions bury ETHE. The below maximum (32°C) most crops can withstand. showed slight it passed From integrated observed At night, heated up across pipes, indicating working heater. We concluded greenhouses arid climates be cooled concept which would save large amount water otherwise consumed evaporative coolers. Further investigations are highly encouraged.