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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.   3. Calculate the heat input during reheating process.

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.   3. Calculate the heat input during reheating process.

Refrigeration and Air Conditioning Technology (MindTap Course List)
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter2: Matter And Energy
Section: Chapter Questions
Problem 26RQ: How many Btu of heat can be produced by 4 kWh ofelectricity?
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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.

 

3. Calculate the heat input during reheating process.

O 651.344 kJ/kg O536.144 kJ/kg O 416.355 kJ/kg O 354.166 kJ/kg
Transcribed Image Text:O 651.344 kJ/kg O536.144 kJ/kg O 416.355 kJ/kg O 354.166 kJ/kg
WW B 2.8MPa 540°C 13.85MPa 540°C 8MPa 480°C 3 2MPa 460°C S,=S, S 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 19.94kPa 60°C
Transcribed Image Text:WW B 2.8MPa 540°C 13.85MPa 540°C 8MPa 480°C 3 2MPa 460°C S,=S, S 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 19.94kPa 60°C
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