固態氧化物燃料電池熱力學分析

A Thermodynamic Analysis of Solid Oxide Fuel Cells

宣崇堯(C. Y. Hsuan)

指導教授 ： 張昌財教授

元智大學/工程學院/機械工程學系/碩士(1994年)

摘要

燃料電池是被看好的一種發電技術，尤其固態氧化物型燃料電池較其它燃
料電池及傳統發電設備有更高的發電效率，而且其廢熱質高，適合做汽電
共生等複合式發電，值得一提的是，固態氧化物燃料電池對燃料的適用性
很高，甚至煤氣也可用做其發電燃料。為了方便及準確的分析固態氧化物
燃料電池系統的情形，本研究利用電腦語言發展了一套計算程式，可在各
種不同條件下得到系統之能量分析、熱量分析、功勢效率及熱電比等結果
。此外，本研究也針對兩種型式(直接式與間接式)的重組器以及陰、陽兩
極的溫度差對系統造成的影響做分析。分析之後發現間接式重組器較直接
式有利於系統的操作，而陰、陽兩極之間的溫度差則對系統的影響很小。

關鍵字

固態氧化物燃料電池 ； 重組器 ； 功勢效率

並列摘要

Fuel cells are expected to play an important role in future
production of electricity. The advantages of solid oxide fuel
cells over other power generating systems including fuel cells
of other kinds are higher efficiency of electricity generation
4 and better quality of heat production. In particular, a wide
variety of different kinds of primary energy including coals
can be used as fuels for this kind of fuel cells. In this
study, a computer program was developed for analyzing the
performance of solid oxide fuel cells. Results of electric
work, heat productions, heat to electricity ratios, exergy
efficiency and losses of work during the conversion process
under conditions of differ- ent temperature, pressure, oxygen
content, steam to carbon ratio as well as conversion ratios of
methane, hydrogen and oxygen were computed and analyzed.
Further, effect of direct and indirect reforming, as well as
different temperature gradient across cathodes and anodes were
studied. It is concluded that better results are obtained for
systems with indirect reforming than the systems with direct
reforming, and temperature gradients across the electrodes have
little effects on the solid oxide fuel cells systems.

並列關鍵字

Solid Oxide Fuel Cells ； Reformer ； Exergy Efficiency