The steam is expanded isentropically in steam turbine from 20 bars, 350∘C to 0.08 bars and then it condensed to saturated liquid water in the condenser. The pump feeds back the water into the boiler. Neglect losses in the processes, the cycle efficiency (in percentage) areGiven data: At p = 0.08 bar, hfg = 2403.1 kJ/kg, sfg = 7.6361 kJ/kg K, vf = 0.001008 m3/kgh1 =3159.3 kJ/kg, s1 = 6.9917 kJ/kg K, h3 = 173.88 kJ/kg, s3 = 0.5926 kJ/kgK,a)27.5b)32.5c)37.5d)41.67Correct answer is option 'B'. Can you explain this answer?

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Given data: At p = 0.08 bar, hfg = 2403.1 kJ/kg, s_fg = 7.6361 kJ/kg K, v_f = 0.001008 m3/kg

h₁ =3159.3 kJ/kg, s₁ = 6.9917 kJ/kg K, h₃ = 173.88 kJ/kg, s₃ = 0.5926 kJ/kgK,

a)
27.5
b)
32.5
c)
37.5
d)
41.67

Correct answer is option 'B'. Can you explain this answer?

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The steam is expanded isentropically in steam turbine from 20 bars, 3...

?cycle = W_net/Q1

W_net = W_T – W_P

W_T = h₁ – h₂

As, s₁ = s₂ = s₃ + xs_fg= 0.5926 + 7.6361 x

x = 0.838

h₂ = h₃ + x hfg = 173.88 + 0.838 × 2403.1 = 2187.68 kJ/kg

W_T = h₁ – h₂ = 3159.3 – 2187.68 = 971.62 kJ/kg

W_P = v_f (p₁−p₂) = 0.001008 × (20 – 0.08) × 10² = 2 kJ/kg

h₄ – h₃ = 2

h₄ = 175.88 kJ/kg

W_net = 971.62 – 2 = 969.62 kJ/kg

Heat added, Q₁ = h₁ – h₄ = 2983.42 kJ/kg

?cycle = 969.62/2983.42 = 0.325 = 32.5 %

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The steam is expanded isentropically in steam turbine from 20 bars, 350∘C to 0.08 bars and then it condensed to saturated liquid water in the condenser. The pump feeds back the water into the boiler. Neglect losses in the processes, the cycle efficiency (in percentage) areGiven data: At p = 0.08 bar, hfg = 2403.1 kJ/kg, sfg = 7.6361 kJ/kg K, vf = 0.001008 m3/kgh1 =3159.3 kJ/kg, s1 = 6.9917 kJ/kg K, h3 = 173.88 kJ/kg, s3 = 0.5926 kJ/kgK,a)27.5b)32.5c)37.5d)41.67Correct answer is option 'B'. Can you explain this answer?

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The steam is expanded isentropically in steam turbine from 20 bars, 350∘C to 0.08 bars and then it condensed to saturated liquid water in the condenser. The pump feeds back the water into the boiler. Neglect losses in the processes, the cycle efficiency (in percentage) areGiven data: At p = 0.08 bar, hfg = 2403.1 kJ/kg, sfg = 7.6361 kJ/kg K, vf = 0.001008 m3/kgh1 =3159.3 kJ/kg, s1 = 6.9917 kJ/kg K, h3 = 173.88 kJ/kg, s3 = 0.5926 kJ/kgK,a)27.5b)32.5c)37.5d)41.67Correct answer is option 'B'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about The steam is expanded isentropically in steam turbine from 20 bars, 350∘C to 0.08 bars and then it condensed to saturated liquid water in the condenser. The pump feeds back the water into the boiler. Neglect losses in the processes, the cycle efficiency (in percentage) areGiven data: At p = 0.08 bar, hfg = 2403.1 kJ/kg, sfg = 7.6361 kJ/kg K, vf = 0.001008 m3/kgh1 =3159.3 kJ/kg, s1 = 6.9917 kJ/kg K, h3 = 173.88 kJ/kg, s3 = 0.5926 kJ/kgK,a)27.5b)32.5c)37.5d)41.67Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The steam is expanded isentropically in steam turbine from 20 bars, 350∘C to 0.08 bars and then it condensed to saturated liquid water in the condenser. The pump feeds back the water into the boiler. Neglect losses in the processes, the cycle efficiency (in percentage) areGiven data: At p = 0.08 bar, hfg = 2403.1 kJ/kg, sfg = 7.6361 kJ/kg K, vf = 0.001008 m3/kgh1 =3159.3 kJ/kg, s1 = 6.9917 kJ/kg K, h3 = 173.88 kJ/kg, s3 = 0.5926 kJ/kgK,a)27.5b)32.5c)37.5d)41.67Correct answer is option 'B'. Can you explain this answer?.

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