Chapter 8, Problem 8.20CU

Please answer a,b,c. Badly needed. Thank you.

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2. thermodynamics. please answer asap

Question 4 of 15 Steam enters the turbine of a vapor power plant at 600 lbf/in.2, 1000°F and exits as a two-phase liquid-vapor mixture at 90°F. Condensate exits the condenser at 85°F and is pumped to 600 lbf/in.2 The turbine and pump isentropic efficiencies are 90 and 80%, respectively. The net power developed is 1 MW. Determine: (a) the percent steam quality at the turbine exit. (b) the percent thermal efficiency. (c) the steam mass flow rate, in lb/h. I

2. please answer asap

1. In order to achieve the highest possible efficiency for a power cycle, what should be the value of the working fluid's critical temperature? A. As low as can be B. As high as can be C. The critical temperature has no effect on the efficiency D. None of the items mentioned 2. What is the disadvantage of using steam as the working fluid for power cycles? A. Since the critical temperature of water is high, it requires high superheating. B. Small value for QH C. Reheating is needed, and that entails additional cost. D. All of the items mentioned 3. When the feedwater in a rankine cycle is closed, A. Heat transfer capacity is large. B. A pump is needed to handle the increase in the feedwater stream. C. Only one pump is needed even if there is an increase in the feedwater stream. D. No pump is needed since mixing in the heater does not occur anyway. 4. This is a type of feedwater heater where the steam taken from the turbine and the feedwater from the condenser exchange heat with each…

Please explain steps

Four lbm/sec of steam enter a turbine with a velocity of 65 ft/sec and the enthalpy  of  1350  BTU/lbm.  The  steam  enters  the  condenser  after  being expanded  to  1075  BTU/lbm  and  125  ft/sec.  The  total  heat  loss  from  the turbine casing is 50 BTU/sec. What power is generated by the turbine? A. 1400hp B. 1600hp C. 1500 hp D. 1700 hp

In a steam plant 100 kg/min of dry-saturated steam at 30 bar enters the turbine. After expanding isentropic ally the exhaust steam enters the condenser. The condenser pressure is maintained at 0.1 bar by the cooling water taken from a nearby river. Calculate the following: a. Dryness fraction of exhaust steam. b. Turbine work output. c. Work input to the feed pump. d. Heat supplied to the boiler. e. Heat rejected to the cooling water.  f. Efficiency of the plant. g. Net power output.