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

引用

Journal of Arid Land 2021年第4期13卷 388-396页

作者： Abdulrahim M al-ISMAILI Moustafa A FADEL Hemantha JAYASURIYA L H Janitha JEEWANTHA Adel al-MAHDOURI talal al-shukeili Department of Soils Water and Agricultural EngineeringSultan Qaboos UniversityMuscat PC123Oman Department of Arid land Agriculture United Arab Emirates UniversityAl-Ain 17555United Arab Emirates Centre for Future Materials&School of Mechanical and Electrical Engineering University of Southern QueenslandToowoomba QLD 4350Australia

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

关键词： earth-tube heat exchanger greenhouse fan-pad cooling system water saving arid areas

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