Question

ption A vapor power plant, shown below, operates with water at steady state. The water flows through the boiler at a constant pressure of 7 MPa, transitioning from saturated liquid to saturated vapor. The water also flows through the condenser at a constant pressure of 70 kPa, from a quality of 90 % to a quality of 30 %. Boiler Pump Turbine W, 3 Condenser

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Answer 1

uso ing At he From given dator, by Stem table 7771 2 1267 KI kg hg 72 712.1 YT Kg To, = 29979 C 1

At 70 kpa, h bg 2 24ga k) Leg big 283.3 ki ୯ ka 13. Вя, 93 °C 2

T 3 S data T-8 diagran by wing given

Heat transfer through builes Q = (h. --bu) ME S ng Griben Date8 tremult in ballar ifren Saturated ligeid to ishrab a Vape To buy con 7 rope AL 7 opo, Suderados ligonins Endholphy Ch2, 2 12 67 hiny Saturates vapor Enthuslphy (2) = 2772.1 kТ ag Q2 2772.1-1267 Q2 3 1505. KT ng

Qua) Thermal Efficieng of cycle Net work done 2 Heat supplied ko - Wp Qs west done by turbine = h, -hz At 70 kPa h₂r hfz + x₂ hege 2 376.770.9 (2283,3) h 2 2431,67 KI kg laly z 2222.1 243167 Hy = 340.43 killeg

Wook required by pump (help) = hy h₂ har hfat az Afg, - 376.3 70.3 (2283-3) ha LO61,7 kI wg lep a 1267 -loolz KT kg klp 2 205.3 ho kg Q 13) Ky - We 340-43 -2003 کام 150s. Thermal Efficiers of cyclo Qg n = 8,97% 014) Manimam theorelied Efficiency Ti 22 Tm where Tm is V me on temperature n & Proa hap-hu Tmi 3.-54

2272.1 - 12 67 Tm r. 5.8133 3.1211 Tmz 559.05k Tzz Condenter temperature z 89.95°c Tzz 362.95 k. TL Nomor 2 TL Th 214) 2 362.95 55905 2 Roma 35072 215) theoretical Efficiency The maximum the than thermal Efficieny greator is of Gale rer, n e nmor Giren Cycle is is foreversible