FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119634928
Author: Borgnakke
Publisher: WILEY
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In a Rankine Cycle, steam enters the turbine at 2.5 MPa and condenser of 50KPa.What is the thermal efficiency of the cycle?
Steam enters the turbine at 10 MN/m2and 450oC. The steam expanded in the turbine down to the condenser pressure of 20 kN/m2. The condensate leaving the condenser is pumped to the boiler pressure directly. The turbine has an isentropic efficiency of 89%, and the mass of steam generated in the boiler is 5 kg/s. Find: Cycle thermal efficiency. Plant power output.Neglect the pump work and draw the cycle on a T – s diagram. Hint: 1 MN/m2= 10 bar
TNB steam power plant in Genting Highlandsoperates on reheat Rankine cycleand has power net output of 50MW. Steam enters the turbine at aMPa and b °Cand it is cooled in the condenser at a pressure of ckPa by running cooling water from the Bertam River through the tubesof condenser. Steam enters both stages of the turbine at b°C. If the moisture content of the steam at the exit of the low-pressure turbine is not to exceed 10 percent, show the cycle on a T-s diagram and determine;i.The pressure at which reheating takes place, ii.The thermal efficiency of the cycleandiii.Please justify how does the thermal efficiency of the cycle if the temperature to low turbine is increase to 600°C?
a=12
b=500
c=12
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- Consider a steam plant operating on the ideal Rankine cycle. Steam enters the turbine at 3 MPa and 350°C and is condensed in the condenser at a pressure of 10 kPa. Determine The thermal efficiency if steam is superheated to 600°C instead of 350°C in %. Include your T - S diagram on your solution SI unit plsss thankyouarrow_forwardExample 2: Refrigerant R-134a enter the compressor of a has a refrigerantor a superheared vapor at 0.14MPa and -10°C at arate of 0.05kg/sec and leave at 0.8Mp and 50°C.The refrigerant cooled in the condenser to 26°C and 0.72Mpa is throttled to 0.15MPa.Disregradingany heat transfere and pressure drop in the connecting line between the components. Determine: a) The rate of heat removed from the refrigerated space b) The power input to the compressor. c) Isentropic eff of the compressor d) COP of the refrigerantor.arrow_forwardRefrigerant 134a enters the compressor of a vapor-compression refrigeration cycle at 150 kPa as a saturated vapor and leaves at 850 kPa. The refrigerant leaves the condenser as a saturated liquid. The rate of cooling provided by the system is 7kW. a. Determine the mass flow rate of R-134a and the cop of the cycle. b. If the condenser pressure is changed to 950 kPa, find the cop of the cycle.arrow_forward
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