( )( ) 7 MPa q in = = 10 kpa q out. 1 h. = s. Thus, and = 38.9% (b) (c) The rate of heat rejection to the cooling water and its temperature rise are

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1 . A team poer plant operate on a imple ideal Ranke cycle beteen te peciied preure limit. e termal eiciency o te cycle, te ma lo rate o te team, and te temperature rie o te coolg ater are to be determed. Aumption Steady operatg condition exit. Ketic and potential energy cange are negligible. Analyi (a From te team table (able A-, A-, and A-,.8 kj u, and (b v v 0 0 kpa v( P P ( m (,000 0 kpa.0 kj + p, P MPa 00 C m kj.8000 kj K kj kpa m kj P 0 kpa x x.8 + t W& m & kj..8.8 kj kj 0. kj 8.%. kj,000 kj/ 0. kj. 0 kg/ ( 0.80(.. kj (c e rate o eat rejection to te coolg ater and it temperature rie are m & (.8 kg/(.8 kj 0,8 kj/ 0,8 kj/ Δcoolgater ( mc & 000 kg/.8 kj C 8. C coolgater ( ( MPa 0 kpa

2 . A team poer plant tat operate on te ideal reeat Ranke cycle i conidered. e turbe ork put and te termal eiciency o te cycle are to be determed. Aumption Steady operatg condition exit. Ketic and potential energy cange are negligible. Analyi From te team table (able A-, A-, and 0 kpa. kj v 0 kpa m, ( p v P P kj ( m ( kpa MPa kpa m.08 kj + p, P MPa 00 C P MPa kj 8. kj. kj K 0.0 kj 0 kpa P MPa 00 C 8. kj. kj K P 0 kpa x.0 + x. + ( 0.800(.. kj e turbe ork put and te termal eiciency are determed rom, ( + ( kj and u, t ( ( kj, p, 0 kj 8 kj.08 0 kj 0.8.8%

3 . A team poer plant tat operate on an ideal reeat Ranke cycle beteen te peciied preure limit i conidered. e preure at ic reeatg take place, te total rate o eat put te boiler, and te termal eiciency o te cycle are to be determed. Aumption Steady operatg condition exit. Ketic and potential energy cange are negligible. Analyi (a From te team table (able A-, A-, and A-, v v p, at@ 0 kpa at@ 0 kpa v ( P P ( m (,000 0 kpa. kj + p, P MPa 00 C P 0 kpa.8 kj m kj kpa m kj 0.8 kj.80 kj K + x 00 C P 0 kpa. kj + x ( 0.0(. ( 0.0(. ( te reeat preure. kj.88 kj K 0 kpa P. MPa (b e rate o eat upply i Q & m& + 8. kj [( ( ] ( kg/( ,0 kw (c e termal eiciency i determed rom u, t m& ( ( kj/(.,8 kj/.%,0 kj/ kj.8 kj,8 kj/

4 . A team poer plant operate on an ideal regenerative Ranke cycle it to open eedater eater. e poer put o te poer plant and te termal eiciency o te cycle are to be determed. Aumption Steady operatg condition exit. Ketic and potential energy cange are negligible. Analyi Boiler II P III P II I 8 P I urbe 0 Condener 0 MPa 0. MPa 0. MPa kpa y 8 - y - y - z 0 (a From te team table (able A-, A-, and A-, v v pi, kpa. kj m ( P P ( m ( 00 kpa + pi, P 0. MPa at.liuid v v pii, kj ( P P ( m ( kpa 0. kj P 0. MPa at.liuid v v piii, v v + pii, kj kpa m ( P P ( m ( 0, kpa 0. kj + piii, P 0 MPa 00 C P8 0. MPa 8 8 P 0. MPa x 0. kj m MPa.8 kj.0 kj K 8.8 kj 0.8 kj m kj + x kj kpa m kj kpa m 0.0 kj ( 0.0( kj

5 . An ideal regenerative Ranke cycle it a cloed eedater eater i conidered. e ork produced by te turbe, te ork conumed by te pump, and te eat added te boiler are to be determed. Aumption Steady operatg condition exit. Ketic and potential energy cange are negligible. Analyi From te team table (able A-, A-, and A-, v v 0 0 kpa. kj m v ( P P kj (0.000 m (000 0kPa kpa m.0 kj kj p, P 000 kpa. kj 0 C.0 kj K 8 Cloed P 000 kpa 8. kj Pump P 0 kpa x x. + (0.8(.. kj For an ideal cloed eedater eater, te eedater i eated to te exit temperature o te extracted team, ic ideally leave te eater a a aturated liuid at te extraction preure. P 000 kpa. kj x 0. C MPa 8. kj P 000 kpa MPa y. kj 0. C An energy balance on te eat excanger give te 8 0 kpa -y raction o team extracted rom te turbe ( m & / m& or cloed eedater eater: m& ii m& ee m& + m& m& + m& y + + y Rearrangg,.. y en, + ( y( ( 0.( kj Alo,, P,.0 kj.. kj, P, t 0..8 kj Boiler urbe Condener

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