<p>A new geothermal multi-generation system has been created, which incorporates an organic Rankine cycle, an internal heat exchanger, a feed water heater, a double-effect absorption refrigeration cycle, an electrolyzer, a dual flash geothermal source, and a cascade liquefaction cycle, accompanied by comprehensive thermodynamic and economic evaluations. It is anticipated that this system will produce hydrogen at a rate of 114 kg <InlineEquation ID="IEq1"> <EquationSource Format="TEX">${\text{h}}^{-1}$</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mrow> <mtext>h</mtext> </mrow> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> </math></EquationSource> </InlineEquation> with an output power measured at 36,558 kW. The analysis shows that the total exergy destruction within the assessed system is 98,956 kW. The economic evaluation indicates a complete system cost of 0.37$ <InlineEquation ID="IEq2"> <EquationSource Format="TEX">${\text{G}\text{J}}^{-1}$</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mrow> <mtext>GJ</mtext> </mrow> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> </math></EquationSource> </InlineEquation>. Additionally, the levelized cost of electricity generation is 0.03 cents<InlineEquation ID="IEq3"> <EquationSource Format="TEX">${\text{k}\text{W}\text{h}}^{-1}$</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mrow> <mtext>kWh</mtext> </mrow> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> </math></EquationSource> </InlineEquation>, whereas the levelized cost of hydrogen production is recorded at 2.009$<InlineEquation ID="IEq4"> <EquationSource Format="TEX">${ \text{k}\text{g}}^{-1}$</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mrow> <mtext>kg</mtext> </mrow> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> </math></EquationSource> </InlineEquation>. The innovative liquefaction cycle presented in this research demonstrates a performance factor of 36%, with the exergy efficiency of this unit calculated to be 39%.</p>

Energy, exergy, economic and environment analysis of a novel geothermal based multigeneration system integrated with cascade Claude cycle for power, heat, cooling and liquid hydrogen production

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发表日期：

2026年6月2日

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Ali Eyvazi,
Mehran Ameri,
Mohammad Shafiey Dehaj,
Hadi Ghaebi

摘要

A new geothermal multi-generation system has been created, which incorporates an organic Rankine cycle, an internal heat exchanger, a feed water heater, a double-effect absorption refrigeration cycle, an electrolyzer, a dual flash geothermal source, and a cascade liquefaction cycle, accompanied by comprehensive thermodynamic and economic evaluations. It is anticipated that this system will produce hydrogen at a rate of 114 kg ${\text{h}}^{-1}$ $h^{- 1}$ with an output power measured at 36,558 kW. The analysis shows that the total exergy destruction within the assessed system is 98,956 kW. The economic evaluation indicates a complete system cost of 0.37$ ${\text{G}\text{J}}^{-1}$ ${GJ}^{- 1}$ . Additionally, the levelized cost of electricity generation is 0.03 cents ${\text{k}\text{W}\text{h}}^{-1}$ ${kWh}^{- 1}$ , whereas the levelized cost of hydrogen production is recorded at 2.009$ ${ \text{k}\text{g}}^{-1}$ ${kg}^{- 1}$ . The innovative liquefaction cycle presented in this research demonstrates a performance factor of 36%, with the exergy efficiency of this unit calculated to be 39%.