Download e-book for kindle: Assessment of Research Needs for Advanced Fuel Cells by S. S. Penner

By S. S. Penner

ISBN-10: 0080339905

ISBN-13: 9780080339900

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4 - a t m N e w Y o r k a n d G o i d e m o n s t r a t i o n u n i t s o p e r a t e d a t 0 . 65 V / c e l l a n d 2 5 0 m A / c m ^ b u t w e r e o n l y c a p a b l e of h e a t - r a t e s of 9 3 0 0 o r 9 5 0 0 B T U / k W h ( 3 6 o r 37% H H V e f f i c i e n c y ) , d e p e n d i n g o n t h e f u e l u s e d ( l i g h t d i s t i l l a t e o r N G ) . A s i s s h o w n i n S e c , 2 . 6, t h i s h e a t - r a t e i s m a r g i n a l for p r a c t i c a l utility u s e . Starting about 1 9 8 0 , U T C c o m m e n c e d the d e s i g n of a n a d ­ v a n c e d s y s t e m ^ ^ w i t h t h e c a p a b i l i t y of a c h i e v i n g l o w e r c o s t a n d h i g h e r e f f i c i e n c y .

The plant d e m o n s t r a t e d a p e r i o d of s a t i s f a c t o r y o p e r a t i o n under full p o w e r o n NG a t t h e h e a t - r a t e a n d a n t i c i p a t e d l e v e l s o f c h e m i c a l a n d a c o u s t i c e m i s s i o n s p r e d i c t e d b y U T C . H e a t - r a t e s a r e s h o w n i n F i g . 2 . 8 - 1 . The plant w a s m a i n t a i n e d by the utility and p r o d u c e d u t i l i t y quality AC power with the c o r r e c t s t a r t - u p / s h u t - d o w n and p a r t - l o a d to f u l l - l o a d c h a r a c t e r i s ­ t i c s .

22 Energy, The International Journal T h e a d v a n t a g e of t h e i n t e r n a l r e f o r m i n g s y s t e m s , p a r t i c u l a r l y t h e M C F C , i s c l e a r ; a s e x p e c t e d , t h e A F C h a s t h e l o w e s t o v e r a l l e f f i c i e n c y . A c c o r d i n g t o R e f . 3 , i t s e f f i c i e n c y (97 0 0 B T U / k W h a t 200 m A / c m ^ ) m a y not be e c o n o m i c a l l y a c c e p t a b l e for a U . S . e l e c t r i c utility. A P A F C 2 4 - c e l l stack has now run m o r e than 25, 000 h.

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Assessment of Research Needs for Advanced Fuel Cells by S. S. Penner


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