Three alternative steam cycles illustrated in the figures are proposed for a nuclear power station capable...

 

Transcribed Image Text:

Three alternative steam cycles illustrated in the figures are proposed for a nuclear power station capable of producing either saturated steam or superheated steam at a temperature of 290 °C. The condensing steam temperature is 30 °C. (Note the figures indicate different temperatures - please disregard those values) 1. Assuming ideal machinery, calculate the cycle thermal efficiency and steam rate each cycle using steam tables [kg steam] kWe.hr for 2. For each cycle, compare the amount of heat added per unit mass of working fluid in the legs 3'>4 and 4 -> 1. 3. Briefly compare advantages and disadvantages of each of these cycles. Which would you use? Temperature, T 293 C 4 CYCLE #1 33 C 3 LA LA 293 C CYCLE #2 3 2 Temperature, T 33 C 1 Entropy, s Entropy, s Temperature, T 293 C 33 C 3' 3 p=5 MPa CYCLE #3 5 2 Entropy, s Three alternative steam cycles illustrated in the figures are proposed for a nuclear power station capable of producing either saturated steam or superheated steam at a temperature of 290 °C. The condensing steam temperature is 30 °C. (Note the figures indicate different temperatures - please disregard those values) 1. Assuming ideal machinery, calculate the cycle thermal efficiency and steam rate each cycle using steam tables [kg steam] kWe.hr for 2. For each cycle, compare the amount of heat added per unit mass of working fluid in the legs 3'>4 and 4 -> 1. 3. Briefly compare advantages and disadvantages of each of these cycles. Which would you use? Temperature, T 293 C 4 CYCLE #1 33 C 3 LA LA 293 C CYCLE #2 3 2 Temperature, T 33 C 1 Entropy, s Entropy, s Temperature, T 293 C 33 C 3' 3 p=5 MPa CYCLE #3 5 2 Entropy, s

Answer rating: 100% (QA)

ANSWER We need to find the specific enthalpy of working substance ... View the full answer