FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
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* The system diagram and a number of the state properties are given below for a
regenerative Rankine cycle. The isentropic efficiency of both turbines is 85% and the isentropic efficiency
of the pump is 90%. Using the provided state data below, detemine the:
(a) Percent of diverted flow after the first turbine, y
(b) The thermal efficiency of the cycle, ncyc
(c) The entropy production rate at the closed feedwater heater per mass flow of steam entering the
first turbine "FWH, in [kJ/kg-K]
State T ("C) p (kPa) h (kJ/kg)
s (kJ/kg-K)
480
10000
3323
6.531
172.4
700
2781
6.749
2s
164.9
2686
6.531
|3[a -»
3
36.16
6.
2183
7.09
(y)
3s
36.16
2078
6.749
Steam
4
36.16
151.5
0.5208
Condenser
generator
5
36.69
162.6
0.5244
(1)
0.5208
1.98
5s
36.43
161.5
Pump
6.
164.9
702.3
7
164.9
697
1.992
|t
8
36.16
697
2.285
Closed
feedwater
heater
Trap
(y)
(v)
provide a step by step solution for the following question in the added image
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- efficiency, and (c) the combined engine efficiency. (3) Steam at 5.2 MPa, 400°C expands in a Rankine turbine to 0.036MP.. For 136 kg/s of steam, determine the work, the thermal efficiency, and the steam rate (a) fot the cycle(b) for the turbine, (c) for an actual turbine with the same specifications, the brake steam rate is 4.80 kg/kwh ang the driven electric generator has an efficiency of 93%, Find brake thermal efficiency, brake engine efficiency, combined work, and quality or temperature of exhaust steam. (4) A turbine receives steam at 10 MPa, 600°C and exhaust it at 0.2 MPa, (a) for the ideal Rankine enginearrow_forwardpart a b and carrow_forwardAir is used for a Carnot power cycle, whose temperature and pressure bounds are 500 K and 300 K, and 750 kPa and 100 kPa, respectively. Consider air with constant specific heats at the average temperature. A. Draw this cycle on P-v and T-s diagrams. B. Find the pressure, temperature and specific volume at each state of the cycle. C. What is the net specific work output of the cycle? D. What is the thermal efficiency of the cycle?arrow_forward
- We only need results , you don't need to show transactions . Result is needed fast.thanksarrow_forward3.1 Describe with the aid of a plant layout and p-v and T-s diagrams, the working of simple closed circuit, ideal and actual constant pressure gas turbine cycles.arrow_forwardDetermine percent change in efficiency of Otto cycle when Compression ratio is changed to 12 from 8.arrow_forward
- Air enters the compressor of an ideal air-standard Brayton cycle at 119 kPa, 328 K, with a volumetric flow rate of 1358 m3/s. The compressor pressure ratio is 8. The turbine inlet temperature is 1358 K. Take Specific heat at constant pressure and constant volume for air as 1.006 kJ/kg K and 0.717 kJ/kg K respectively. Calculate the work ratio of the plant to one decimal place and include the correct unit (percentage). Us cold air standard assumption.arrow_forwardplease provide the solution with detailed steps use baryton cycle principle to calculatearrow_forwardIn a lenoir cycle, helium is taken in at 60 K with a pressure ratio of 8.45. The ratio of the volume between the start and end of heat rejection is 3.99. Find the change in entropy in BTU/lb-R of the heat addition process. use R= 8.314 kJ/ kmol -K, k=1.667, mw = 4 g/molarrow_forward
- Get the following values for each stage: Stage 3: P3, T3, S3, H3 Stage 4: P4, T4, S4, H4 Explain how to get values please.arrow_forwardCan you briefly define the Stirling cycle and write down its biggest message?arrow_forwardA 136 kg/s steam with an inlet condition of 52 bar, 400 C enters a rankine turbine and expands to 36 kPa. determine the work, the thermal efficiency, and the steam rate (a) for the cycle, (b) for the turbine. (c) With the same specifications, consider the steam expanded on an actual turbine and the brake steam rate is 4800 g/kwh and the driven electric generator has an efficiency of 0.93. Find Brake Thermal Eff, Brake Engine Eff, Combined Work, and quality or temperature of actual exhaust steamarrow_forward
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