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In an ideal reheat cycle, the steam throttled condition is 8 MPa and 480 degree C. the steam is then reheated to MPa and 460 degree C. the turbine exhaust is 60 degree C. The required values of some state point properties are tabulated below.   5. Calculate the thermal efficiency of the cycle

In an ideal reheat cycle, the steam throttled condition is 8 MPa and 480 degree C. the steam is then reheated to MPa and 460 degree C. the turbine exhaust is 60 degree C. The required values of some state point properties are tabulated below.   5. Calculate the thermal efficiency of the cycle

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter5: Analysis Of Convection Heat Transfer
Section: Chapter Questions
Problem 5.2P: 5.2 Evaluate the Prandtl number from the following data: , .
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In an ideal reheat cycle, the steam throttled condition is 8 MPa and 480 degree C. the steam is then reheated to MPa and 460 degree C. the turbine exhaust is 60 degree C. The required values of some state point properties are tabulated below.

 

5. Calculate the thermal efficiency of the cycle

WW B 2.8MPa 540°C 13.85MPa 540°C 8MPa 480°C 3 2MPa 460°C S,=S, S 19.94kPa 60°C T,= ! T₂= 75% 75% 6 3.4kPa 4 6 At P = 8 MPa and T = 480 °C s (kJ/kg-K) h (kJ/kg) 6.6586 3348.4 At P = 2 MPa (for superheated steam with s1 = s2) s (kJ/kg-K) h (kJ/kg) 6.6388 2952.3 S h 6.6828 2976.4 At P = 2 MPa and T = 460 °C s (kJ/kg-K) h (kJ/kg) 7.3147 3379.5 At 60 °C Psat 19.94 kPa vf = 0.0010172 m^3/kg sf = 0.8312 kJ/kg-K hf = 251.13 kJ/kg sfg = 7.0784 kJ/kg-K hfg = 2358.5 kJ/kg
Transcribed Image Text:WW B 2.8MPa 540°C 13.85MPa 540°C 8MPa 480°C 3 2MPa 460°C S,=S, S 19.94kPa 60°C T,= ! T₂= 75% 75% 6 3.4kPa 4 6 At P = 8 MPa and T = 480 °C s (kJ/kg-K) h (kJ/kg) 6.6586 3348.4 At P = 2 MPa (for superheated steam with s1 = s2) s (kJ/kg-K) h (kJ/kg) 6.6388 2952.3 S h 6.6828 2976.4 At P = 2 MPa and T = 460 °C s (kJ/kg-K) h (kJ/kg) 7.3147 3379.5 At 60 °C Psat 19.94 kPa vf = 0.0010172 m^3/kg sf = 0.8312 kJ/kg-K hf = 251.13 kJ/kg sfg = 7.0784 kJ/kg-K hfg = 2358.5 kJ/kg
Ο Ο Ο 39.61% 38.37% 36.37% 37.61%
Transcribed Image Text:Ο Ο Ο 39.61% 38.37% 36.37% 37.61%
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