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This study focuses on modeling a power and heat generation system utilizing an Organic Rankine Cycle (ORC) power plant, with the geothermal source of Hammam Debagh in northeastern Algeria serving as a case study. The ORC geothermal power plant is integrated with a solar Fresnel Lens Reflector and a parabolic Trough collector system, creating a hybrid geothermal solar ORC system (HGS-ORC), which is linked to a heating application system for district heating and drying purposes. An analysis of thermodynamics, energy, and exergy was conducted for four potential system configurations. The analyzed configurations include the basic HGS-ORC, two HGS-ORC setups without a recuperator—one with a mass flow control system for the working fluid (WF) and one without—and two additional HGS-ORC setups with a recuperator, also with and without a mass flow control system. A study was conducted to analyze the economic and environmental aspects of various system configurations, utilizing design data as well as local and global economic and environmental factors. The results show that the HGS-ORC configuration equipped with recuperator and control system has the best energy, economic and environmental performances. The estimated annual production of this configuration is about 10 GWh of electricity and more than 76 GWh of heat available for heating and drying. Based on a conventional power plant working with coal fired as heat source, the avoided CO2 emission by this configuration is about 12.84 t CO2/h.

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Solar-Geothermal Power “HGS-ORC” System for Energy Co-generation: Energy, Economic and Environmental Analysis: Algerian Case

  • 会议论文

  • 发表日期：

    2026年

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  • Mohamed El-Amine Slimani,
  • Maria Sigríður Guðjónsdóttir

摘要

This study focuses on modeling a power and heat generation system utilizing an Organic Rankine Cycle (ORC) power plant, with the geothermal source of Hammam Debagh in northeastern Algeria serving as a case study. The ORC geothermal power plant is integrated with a solar Fresnel Lens Reflector and a parabolic Trough collector system, creating a hybrid geothermal solar ORC system (HGS-ORC), which is linked to a heating application system for district heating and drying purposes. An analysis of thermodynamics, energy, and exergy was conducted for four potential system configurations. The analyzed configurations include the basic HGS-ORC, two HGS-ORC setups without a recuperator—one with a mass flow control system for the working fluid (WF) and one without—and two additional HGS-ORC setups with a recuperator, also with and without a mass flow control system. A study was conducted to analyze the economic and environmental aspects of various system configurations, utilizing design data as well as local and global economic and environmental factors. The results show that the HGS-ORC configuration equipped with recuperator and control system has the best energy, economic and environmental performances. The estimated annual production of this configuration is about 10 GWh of electricity and more than 76 GWh of heat available for heating and drying. Based on a conventional power plant working with coal fired as heat source, the avoided CO2 emission by this configuration is about 12.84 t CO2/h.