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Application of ORC in a Distributed Integrated Energy System Driven by Deep and Shallow Geothermal Energy

Author

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  • Hongmei Yin

    (Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Tianjin University, Ministry of Education of China, Tianjin 300350, China
    School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China)

  • Likai Hu

    (China Huadian Corporation Ltd. Tianjin Company, Tianjin 300203, China)

  • Yang Li

    (Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Tianjin University, Ministry of Education of China, Tianjin 300350, China)

  • Yulie Gong

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Yanping Du

    (China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai 200240, China)

  • Chaofan Song

    (Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Tianjin University, Ministry of Education of China, Tianjin 300350, China)

  • Jun Zhao

    (Key Laboratory of Efficient Utilization of Low and Medium Grade Energy, Tianjin University, Ministry of Education of China, Tianjin 300350, China)

Abstract

This study presents a distributed integrated energy system driven by deep and shallow geothermal energy based on forward and reverse cycle for flexible generation of cold, heat and electricity in different scenarios. By adjusting the strategy, the system can meet the demand of heat-electricity in winter, cool-electricity in summer and electricity in transition seasons. The thermodynamic analysis shows that the thermal efficiency of the integrated energy system in the heating and power generation mode is 16% higher than that in the cooling and power generation mode or the single power generation mode. Meanwhile, the annual heat-obtaining quantity of the system is reduced by 11% compared with that of the independent power generation system, which effectively alleviates the imbalance of the temperature field of the shallow geothermal reservoir. In terms of net power generation, the integrated energy system can generate approximately 31% more electricity than the conventional independent cooling and heating system under the same cooling and heating capacity. An integrated system not only realizes the comprehensive supply of cold and thermal ower by using clean geothermal efficiency, but also solves the temperature imbalance caused by the attenuation of a shallow geothermal temperature field. It provides a feasible way for carbon emission reduction to realize sustainable and efficient utilization of geothermal energy.

Suggested Citation

  • Hongmei Yin & Likai Hu & Yang Li & Yulie Gong & Yanping Du & Chaofan Song & Jun Zhao, 2021. "Application of ORC in a Distributed Integrated Energy System Driven by Deep and Shallow Geothermal Energy," Energies, MDPI, vol. 14(17), pages 1-15, September.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:17:p:5466-:d:627873
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    References listed on IDEAS

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    1. János Szanyi & Ladislaus Rybach & Hawkar A. Abdulhaq, 2023. "Geothermal Energy and Its Potential for Critical Metal Extraction—A Review," Energies, MDPI, vol. 16(20), pages 1-28, October.

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