Browse > Article
http://dx.doi.org/10.14478/ace.2018.1109

Design and Performance Evaluation of Integral-type Hot BoP for Recovering High-temperature Exhaust Gas in 2 kW Class SOFC  

Kim, Young Bae (Plant Engineering Center, Institute for Advanced Engineering)
Kim, Eun Ju (Plant Engineering Center, Institute for Advanced Engineering)
Yoon, Jonghyuk (Plant Engineering Center, Institute for Advanced Engineering)
Song, Hyoungwoon (Plant Engineering Center, Institute for Advanced Engineering)
Publication Information
Applied Chemistry for Engineering / v.30, no.1, 2019 , pp. 62-67 More about this Journal
Abstract
This study was focused on the design and the performance analysis of integral Hot BoP for recovering waste heat from high-temperature exhaust gas in 2 kW class solid oxide fuel cell (SOFC). The hot BoP system was consisted of a catalytic combustor, air preheater and steam generator for burning the stack exhaust gas and for recovering waste heat. In the design of the system, the maximum possible heat transfer was calculated to analyze the heat distribution processes. The detail design of the air preheater and steam generator was carried out by solving the heat transfer equation. The hot BoP was fabricated as a single unit to reduce the heat loss. The simulated stack exhaust gas which considered SOFC operation was used to the performance test. In the hot BoP performance test, the heat transfer rate and system efficiency were measured under various heat loads. The combustibility with the equivalent ratio was analyzed by measuring CO emission of the exhaust gas. As a result, the thermal efficiency of the hot BoP was about 60% based on the standard heat load of 2 kW SOFC. CO emission of the exhaust gas rapidly decreased at an equivalent ratio of 0.25 or more.
Keywords
SOFC; Hot BoP; Catalytic combustor; Air preheater; Steam generator;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 Y. Lee, C. Yang, C. Yang, S. Park, and S. Park, Optimization of operating conditions for a 10 kW SOFC system, Trans. Korean Hydrogen New Energy Soc., 27(1), 49-62 (2016).   DOI
2 T. H. Lee, J. H. Choi, T. S. Park, Y. S. Yoo, and S. W. Nam, Design and self-sustainable operation of 1 kW SOFC system, Trans. Korean Hydrogen New Energy Soc., 20(5), 384-389 (2009).
3 T. H. Lee, Operation Results of the SOFC System Using 2 Sub-Module Stacks, Trans. Korean Hydrogen New Energy Soc., 21(5), 405-411 (2010).
4 J. P. Janssens, M. Dubuisson, and Y. D. Vos, Entropy considerations leading to a validated to the essence reduced model for SOFC and SOEC high temperature heat exchangers, Proceedings of 13th European SOFC & SOE Forum, July 3-6, Lucerne, Switzerland (2018).
5 S. H. Jensen, C. Graves, M. Mogensen, C. Wendel, R. Braun, G. Hughes, Z. Gao, and S. A. Barnett, Large-scale electricity storage utilizing reversible solid oxide cells combined with underground storage of $CO_{2}$ and $CH_{4}$, J. Energy Environ. Sci., 8, 2471-2479 (2015).   DOI
6 K. Lee and J. Kim, Performance enhancement and recovery method of open cathode PEMFC, J. Korean Ind. Eng. Chem., 28(1), 118-124 (2017).
7 K. S. Kim, M. K. Kim, D. K. Noh, Y. Tak, and S. H. Baeck, Synthesis of Pt-Bi/carbon electrodes by reduction method for direct methanol fuel cell, J. Korean Ind. Eng. Chem., 22(5), 479-485 (2011).
8 H. R. Ellamla, I. Staffell, P. Bujlo, B. G. Pollet, and S. Pasupathi, Current status of fuel cell-based combined heat and power systems for residential sector, J. Power Sources, 293, 312-328 (2015).   DOI
9 T. H. Kim, B. H. Ryu, and I. J. Lee, Ion-beam induced changes in the characteristics of Gd-doped ceria, Appl. Chem. Eng., 21(4), 401-404 (2010).
10 H. R. Rim, S. K. Jeong, and J. S. Lee, Characteristics of Pr1-xMxMnO3 (M = Ca, Sr) as a cathode material of solid oxide fuel cell, J. Korean Ind. Eng. Chem., 7(6), 1125-1131 (1996).
11 H. Yoshida and H. Iwai, Thermal management in soild oxide fuel cell systems, proceedings of fifth international conference on enhanced, compact and ultra-compact heat exchangers: science, Engineering and Technology, Semtember 11-16, Hoboken, NJ, USA (2005).
12 S. Wongchanapai, H. Iwai, M. Saito, and H. Yoshida, Selection of suitable operating conditions for planar anode-supported direct-internal-reforming solid-oxide fuel cell, J. Power Sources, 204, 14-24 (2012).   DOI
13 S. S. Yu, D. J. Hong, Y. D. Lee, S. M. Lee, and K. Y. Ahn, Development of a catalytic combustor for a stationary fuel cell power generation system, Renew. Energy, 35(5), 1083-1090 (2010).   DOI
14 S. Wongchanapai, H. Iwai, M. Saito, and H. Yoshida, Performance evaluation of an integrated small-scale SOFC-biomass gasification power generation system, J. Power Sources, 216(15), 314-322 (2012).   DOI
15 R. Payne, J. Love, and M. Kah, Generating electricity at 60% electrical efficiency from 1-2 kWe SOFC products, J. Electrochem. Soc., 25(2), 231-239 (2009).
16 T. H. Yen, W. T. Hong, W. P. Huang, Y. C. Tsai, H. Y. Wang, C. N. Huang, and C. H. Lee, Experimental investigation of 1 kW solid oxide fuel cell system with a natural gas reformer and an exhaust gas burner, J. Power Sources, 195(5), 1454-1462 (2010).   DOI
17 T. G. Ghang, S. M. Lee, K. Y. Ahn, and Y. Kim, An experimental study on the reaction characteristics of a coupled reactor with a catalytic combustor and a steam reformer for SOFC systems, Int. J. Hydrogen Energy, 37(4), 3234-3241 (2012).   DOI
18 S. M. Lee, Y. Lee, K. Y. Ahn, and S. S. Yu, Performance analysis of off-gas/syngas combustor for thermal management of high temperature fuel cell system, Trans. Korean Hydrogen New Energy Soc., 21(3), 193-200 (2010).
19 S. M. Lee, Y. D. Lee, K. Y. Ahn, D. J. Hong, and M. Y. Kim, A study on the design of MCFC off-gas catalytic combustor, Trans. Korean Hydrogen New Energy Soc., 18(4), 406-412 (2007).