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Volume 12
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Article

Performance and Efficiency Analysis of an HT-PEMFC System with an Absorption Chiller for Tri-Generation Applications

by
Geonhui Gwak
,
Minwoo Kim
,
Dohwan Kim
,
Muhammad Faizan
,
Kyeongmin Oh
,
Jaeseung Lee
,
Jaeyoo Choi
,
Nammin Lee
,
Kisung Lim
and
Hyunchul Ju
*
WCSL (World Class Smart Lab) of the Green Battery Lab, Department of Mechanical Engineering, Inha University, 100 Inha-ro Michuhol-gu, Incheon 22212, Korea
*
Author to whom correspondence should be addressed.
Energies 2019, 12(5), 905; https://doi.org/10.3390/en12050905
Submission received: 28 December 2018 / Revised: 28 February 2019 / Accepted: 2 March 2019 / Published: 8 March 2019
(This article belongs to the Section A5: Hydrogen Energy)
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Abstract

An absorption chiller model for tri-generation (combined cooling, heating, and power) is developed and incorporated with the high temperature- (HT-) proton exchange membrane fuel cell (PEMFC) system model that was developed in our previous study. We employ a commercially available flow simulator, Aspen HYSYS, for solving the energy and mass balances of various system components, including an HT-PEMFC stack that is based on a phosphoric acid-doped PBI membrane, natural gas-fueled reformer, LiBr-H2O absorption chiller, balance of plant (BOP) components, and heat exchangers. Since the system’s operating strategy for tri-generation must be changed, depending on cooling or heating loads, a major focus of this study is to analyze system performance and efficiency under different requirements of electricity generation, cooling, and heating conditions. The system simulation results revealed that high-current fuel-cell operation is essential in raising the cooling capacity, but the overall system efficiency is slightly reduced as a result. Using a lower fuel-air ratio for the burner in the reforming module is one alternative that can minimize the reduction in the overall system efficiency under high-current fuel-cell operation and large cooling-capacity modes.
Keywords: tri-generation; phosphoric acid-doped PBI membrane; steam reforming; absorption chiller; fuel cell system modeling tri-generation; phosphoric acid-doped PBI membrane; steam reforming; absorption chiller; fuel cell system modeling

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MDPI and ACS Style

Gwak, G.; Kim, M.; Kim, D.; Faizan, M.; Oh, K.; Lee, J.; Choi, J.; Lee, N.; Lim, K.; Ju, H. Performance and Efficiency Analysis of an HT-PEMFC System with an Absorption Chiller for Tri-Generation Applications. Energies 2019, 12, 905. https://doi.org/10.3390/en12050905

AMA Style

Gwak G, Kim M, Kim D, Faizan M, Oh K, Lee J, Choi J, Lee N, Lim K, Ju H. Performance and Efficiency Analysis of an HT-PEMFC System with an Absorption Chiller for Tri-Generation Applications. Energies. 2019; 12(5):905. https://doi.org/10.3390/en12050905

Chicago/Turabian Style

Gwak, Geonhui, Minwoo Kim, Dohwan Kim, Muhammad Faizan, Kyeongmin Oh, Jaeseung Lee, Jaeyoo Choi, Nammin Lee, Kisung Lim, and Hyunchul Ju. 2019. "Performance and Efficiency Analysis of an HT-PEMFC System with an Absorption Chiller for Tri-Generation Applications" Energies 12, no. 5: 905. https://doi.org/10.3390/en12050905

APA Style

Gwak, G., Kim, M., Kim, D., Faizan, M., Oh, K., Lee, J., Choi, J., Lee, N., Lim, K., & Ju, H. (2019). Performance and Efficiency Analysis of an HT-PEMFC System with an Absorption Chiller for Tri-Generation Applications. Energies, 12(5), 905. https://doi.org/10.3390/en12050905

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