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<p>This study investigates the viability and potential of the Earth-Air Heat Exchanger (EAHE) low-enthalpy geothermal system for greenhouse climate control in arid regions, specifically addressing the prevalent challenge of limited meteorological data. Our approach integrates ERA5-Land data with a subsurface soil temperature model, enabling accurate EAHE design and performance prediction in data-scarce environments like Bahariya Oasis, Egypt. The research confirmed the significant thermal stability of the subsurface soil, establishing its potential as a consistent heat source/sink. Initial simulations highlighted effective winter heating but revealed a need for enhanced summer cooling. We demonstrated that optimizing the EAHE system by increasing airflow successfully maintained greenhouse temperatures within near-optimal ranges (below 35<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_22294_Article_IEq1.gif" Format="GIF" Height="7" Rendition="HTML" Resolution="72" Type="Linedraw" Width="9" /> </InlineMediaObject> <EquationSource Format="TEX">\(\,{}^{\circ }\)</EquationSource> </InlineEquation>C in summer, above 20<InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_22294_Article_IEq1.gif" Format="GIF" Height="7" Rendition="HTML" Resolution="72" Type="Linedraw" Width="9" /> </InlineMediaObject> <EquationSource Format="TEX">\(\,{}^{\circ }\)</EquationSource> </InlineEquation>C in winter) throughout the year. This achievement validates EAHE’s effectiveness for dual heating and cooling in extreme climates. This work provides a robust, data-driven methodology for designing and implementing sustainable, climate-controlled greenhouses in challenging arid zones.</p>

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Assessing the effectiveness of low-enthalpy geothermal energy for greenhouse temperature regulation towards enhancing desert agriculture

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月7日

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  • Anwar Hegazy,
  • Ajit Govind

摘要

This study investigates the viability and potential of the Earth-Air Heat Exchanger (EAHE) low-enthalpy geothermal system for greenhouse climate control in arid regions, specifically addressing the prevalent challenge of limited meteorological data. Our approach integrates ERA5-Land data with a subsurface soil temperature model, enabling accurate EAHE design and performance prediction in data-scarce environments like Bahariya Oasis, Egypt. The research confirmed the significant thermal stability of the subsurface soil, establishing its potential as a consistent heat source/sink. Initial simulations highlighted effective winter heating but revealed a need for enhanced summer cooling. We demonstrated that optimizing the EAHE system by increasing airflow successfully maintained greenhouse temperatures within near-optimal ranges (below 35 \(\,{}^{\circ }\) C in summer, above 20 \(\,{}^{\circ }\) C in winter) throughout the year. This achievement validates EAHE’s effectiveness for dual heating and cooling in extreme climates. This work provides a robust, data-driven methodology for designing and implementing sustainable, climate-controlled greenhouses in challenging arid zones.