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Thermodynamic, Exergetic and Thermoeconomic Analyses of Double-Effect LiBr–Water Absorption Refrigeration Systems with a 5 kW High Temperature PEMFC as Heat Source for Data Center Applications

Author

Listed:
  • Seok-Ho Seo

    (Blue Economy Strategy Institute Co., Ltd., 150 Dogok-ro, Gangnam-gu, Seoul 06260, Korea)

  • Si-Doek Oh

    (Blue Economy Strategy Institute Co., Ltd., 150 Dogok-ro, Gangnam-gu, Seoul 06260, Korea)

  • Ho-Young Kwak

    (Blue Economy Strategy Institute Co., Ltd., 150 Dogok-ro, Gangnam-gu, Seoul 06260, Korea
    Mechanical Engineering Department, Chung-Ang University, Seoul 06974, Korea)

Abstract

Thermodynamic, exergetic and thermoeconomic analyses were performed on two types of double-effect LiBr–water absorption refrigeration systems (ARS) for use with a 5-kW high-temperature proton exchange membrane fuel cell (HT-PEMFC) as a heat source. Proper temperatures of the high-pressure generator, combined generator and condenser, condenser, absorber and evaporator were determined to meet the requirements of constant cooling demands for data center operations. The heat balance of the combined unit of generator and condenser in the industrial double-effect LiBr-water ARS is important for determining the flow rate of the primary vapor refrigerant from the high-pressure generator. The industrial double-effect ARS system, whose analysis has not been studied analytically, outperformed the series double-effect system and provided 6.5 kW of cooling capacity with a coefficient of performance of 0.99. The unit cost of chilled water estimated by the modified productive structure analysis (MOPSA) method is approximately 7.18 USD/GJ (=0.026 US$/kWh). Effective exergetic efficiency of HT-PEMFC with the industrial ARS increases to 57.6% from 47.0%.

Suggested Citation

  • Seok-Ho Seo & Si-Doek Oh & Ho-Young Kwak, 2022. "Thermodynamic, Exergetic and Thermoeconomic Analyses of Double-Effect LiBr–Water Absorption Refrigeration Systems with a 5 kW High Temperature PEMFC as Heat Source for Data Center Applications," Energies, MDPI, vol. 15(9), pages 1-24, April.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:9:p:3101-:d:801018
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    References listed on IDEAS

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    1. Geonhui Gwak & Minwoo Kim & Dohwan Kim & Muhammad Faizan & Kyeongmin Oh & Jaeseung Lee & Jaeyoo Choi & Nammin Lee & Kisung Lim & Hyunchul Ju, 2019. "Performance and Efficiency Analysis of an HT-PEMFC System with an Absorption Chiller for Tri-Generation Applications," Energies, MDPI, vol. 12(5), pages 1-21, March.
    2. Garousi Farshi, L. & Mahmoudi, S.M.S. & Rosen, M.A., 2013. "Exergoeconomic comparison of double effect and combined ejector-double effect absorption refrigeration systems," Applied Energy, Elsevier, vol. 103(C), pages 700-711.
    3. Gebreslassie, Berhane H. & Medrano, Marc & Boer, Dieter, 2010. "Exergy analysis of multi-effect water–LiBr absorption systems: From half to triple effect," Renewable Energy, Elsevier, vol. 35(8), pages 1773-1782.
    4. Kwak, H.-Y. & Kim, D.-J. & Jeon, J.-S., 2003. "Exergetic and thermoeconomic analyses of power plants," Energy, Elsevier, vol. 28(4), pages 343-360.
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