Chapter 8, Problem 8.9E

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4. If the isentropic efficiencies of the turbine and the pump are 80% and 100% respectively in problem 3, determine the following: a. Actual moisture fraction of the exhaust steam. b. Actual Efficiency of the plant.   (number 3 question: In a Steam Power Plant steam enters the turbine at 6 bar and 400oC and is expanded isentropic ally to the condenser pressure of 0.1 bar. Find the condition of the exhaust steam and determine the cycle efficiency.)

A high-pressure gas turbine has an inlet turbine temperature of 927°C and the inlet compressor temperature of 27°. The turbine process functions at a pressure ratio of 6. The isentropic efficiencies of the compressor and turbine are 84% and 90% respectively. Assume the gas is air throughout. a. Determine the thermal efficiency of the gas turbine. b. Calculate the work ratio of the gas turbine. c. Discuss the impact and validity of the gas turbine by assuming the gas is air throughout.

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A reheat cycle with two stages of reheating is executed with steam expanding initially from 200 bar (20 Mpaa) and 540  deg C. The 2 reheater pressures are 40 bar (4 Mpaa)  and 10 bar (1 Mpaa)  and the steam leaves  each reheater at 540 deg C. Steam is bled in between two reheating sessions at a pressure equal to 20 and  15  bars into 2 open feedwater heaters. Condensation occurs at 60 deg C. All expansion and  compression efficiencies are 90 %.  There is a total of 10.3 kg/sec of steam (total mass flow rate m) circulated in the cycle. Answer the following: fill up the blanks in the items below: Actual Rankine cycle efficiency % using Qa’ and Qr’ values   Answer: _____________ If the generator efficiency = 95%, brake engine efficiency = 90%  what is the plant capacity in MW? Answer: ______________________ If Cp water = 4.187 KJ/kg-K; cooling water enters the condenser at 12 deg C and leaves at 21 deg C, find amount of cooling water needed by the condenser in kg/sec. (ACTUAL) Answer:…

A reheat cycle with two stages of reheating is executed with steam expanding initially from 200 bar (20 Mpaa) and 540  deg C. The 2 reheater pressures are 40 bar (4 Mpaa)  and 10 bar (1 Mpaa)  and the steam leaves  each reheater at 540 deg C. Steam is bled in between two reheating sessions at a pressure equal to 20 and  15  bars into 2 open feedwater heaters. Condensation occurs at 60 deg C. All expansion and  compression efficiencies are 90 %.  There is a total of 10.3 kg/sec of steam (total mass flow rate m) circulated in the cycle. Answer the following: fill up the blanks in the items below: Equipment layout and TS diagram for the cycle. Ideal turbine work (KW) Ans:_______________________________ Actual mass of steam bled into the open heater m1’= _____________kg/sec for the heater nearest to the SGU/boiler and m2’ = _____________________kg/sec for the heater nearest to the condenser. Actual engine efficiency (%) Answer: _______________________ Actual Rankine cycle efficiency %…

A reheat cycle with two stages of reheating is executed with steam expanding initially from 200 bar (20 Mpaa) and 540 deg C. The 2 reheater pressures are 40 bar (4 Mpaa) and 10 bar (1 Mpaa) and the steam leaves each reheater at 540 deg C. Steam is bled in between two reheating sessions at a pressure equal to 20 and 15 bars into 2 open feedwater heaters. Condensation occurs at 60 deg C. All expansion and compression efficiencies are 93 %. There is a total of 4.5+ (3*25/100) kg/sec of steam circulated in the cycle. Answer the following: fill up the blanks in the items below: 1. Equipment layout and TS diagram for the cycle 2. Actual mass of steam bled into the open heater m1'= kg/kg for the _kg/sec for the heater nearest to the SGU/boiler and m2' = heater nearest to the condenser. 3. Actual turbine work in KW Answer: 4. Energy Chargeable (actual) Answer: 5. Ideal Rankine engine efficiency % Answer:

The answer is 1.2Mpa ,Show work in handwritten format .