IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v242y2025ics0960148125000618.html
   My bibliography  Save this article

Techno-economic and environmental performance of combined heat and power for hot dry rock based on life cycle assessment

Author

Listed:
  • Li, Tailu
  • Qiao, Yuwen
  • Zhou, Kailun
  • Li, Jie
  • Gao, Xiang

Abstract

Hot dry rock (HDR) is considered a clean alternative energy source to fossil fuels. In order to comprehensively analyze the energy acquisition and energy conversion performance of HDR during the full life cycle, a Thermal-Hydraulic-Mechanical (THM) model is developed in this study to simulate the flow heat transfer in the geothermal reservoir fracture and obtain the production well outlet capacity during the full life cycle. Then, the organic Rankine cycle (ORC)-based stand-alone power (SP) and combined heating and power (CHP) system are built and optimized. Finally, the capacity of the two systems is compared during the full life cycle. The results indicate that the production well outlet temperature fluctuates around 169 °C in the first decade, then drops sharply from the tenth year and levels off after the twentieth year. The length of the decreasing trend of the production well outlet temperature is negatively correlated with the mass flow rate. Compared to the SP system, CHP system has increased the thermal efficiency by 11.44 times and shortened the payback period by three years. Furthermore, the CO2 reduction of the geothermal SP system compared to fossil fuel-based power generation can reach 2.88 × 108 kg.

Suggested Citation

  • Li, Tailu & Qiao, Yuwen & Zhou, Kailun & Li, Jie & Gao, Xiang, 2025. "Techno-economic and environmental performance of combined heat and power for hot dry rock based on life cycle assessment," Renewable Energy, Elsevier, vol. 242(C).
    • Handle: RePEc:eee:renene:v:242:y:2025:i:c:s0960148125000618
    DOI: 10.1016/j.renene.2025.122399
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148125000618
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.renene.2025.122399?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:renene:v:242:y:2025:i:c:s0960148125000618. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.