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A new flexible geothermal based cogeneration system producing power and refrigeration

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  • Mahmoudi, S.M.S.
  • Akbari Kordlar, M.

Abstract

A new cooling/power cogeneration system is proposed, analyzed and optimized from the viewpoints of thermoeconomics. The system uses geothermal water as a heat source and ammonia-water solution as a working fluid. It is an internally interacting combination of a modified Kalina and an absorption refrigeration cycles. A sensitivity analysis is performed to assess the influences of important parameters on the exergeoconomic performance of the system prior to optimizing its performance. It is shown that the mass flow division at the condenser exit plays an important role on the system performance. The optimization is performed for maximum exergy efficiency (case1), and minimum total product unit cost (case2). The results show that the total product unit cost for case 2 is around 17% lower than that for case 1 at the expense of 11.8% reduction in the second law efficiency. Similarly, it is observed that the second law efficiency for case 1 is around 13.4% higher than that for case 2 at the expense of 20.52% increase in the total product unit cost. It is found that, under studied conditions, the highest exergy efficiency and the lowest total product unit cost for system are obtained as 34.8% and $24.5/GJ, respectively.

Suggested Citation

  • Mahmoudi, S.M.S. & Akbari Kordlar, M., 2018. "A new flexible geothermal based cogeneration system producing power and refrigeration," Renewable Energy, Elsevier, vol. 123(C), pages 499-512.
    • Handle: RePEc:eee:renene:v:123:y:2018:i:c:p:499-512
    DOI: 10.1016/j.renene.2018.02.060
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    References listed on IDEAS

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    2. Jie Ren & Zuoqin Qian & Zhimin Yao & Nianzhong Gan & Yujia Zhang, 2019. "Thermodynamic Evaluation of LiCl-H 2 O and LiBr-H 2 O Absorption Refrigeration Systems Based on a Novel Model and Algorithm," Energies, MDPI, vol. 12(15), pages 1-28, August.
    3. Jiansheng, Wang & Lide, Su & Qiang, Zhu & Jintao, Niu, 2022. "Numerical investigation on power generation performance of enhanced geothermal system with horizontal well," Applied Energy, Elsevier, vol. 325(C).
    4. Haojin Wang & Jianyong Wang & Zhuan Liu & Haifeng Chen & Xiaoqin Liu, 2022. "Thermodynamic Analysis of a New Combined Cooling and Power System Coupled by the Kalina Cycle and Ammonia–Water Absorption Refrigeration Cycle," Sustainability, MDPI, vol. 14(20), pages 1-18, October.
    5. Tong Lei & Zuoqin Qian & Jie Ren, 2023. "Performance Evaluation of LiBr-H 2 O and LiCl-H 2 O Working Pairs in Compression-Assisted Double-Effect Absorption Refrigeration Systems for Utilization of Low-Temperature Heat Sources," Energies, MDPI, vol. 16(16), pages 1-19, August.
    6. Nami, Hossein & Anvari-Moghaddam, Amjad, 2020. "Geothermal driven micro-CCHP for domestic application – Exergy, economic and sustainability analysis," Energy, Elsevier, vol. 207(C).
    7. Hou, Rui & Zhang, Nachuan & Gao, Wei & Chen, Kang & Liu, Lijun & Kumar, M. Saravana, 2023. "Design and optimization of a novel flash-binary-based hybrid system to produce power, cooling, freshwater, and liquid hydrogen," Energy, Elsevier, vol. 280(C).

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