Chapter 8, Problem 8.49CU

In steam power cycle, what is the primary objective of using a regenerative cycle?   a. Decrease the amount of necessary work required by the liquid pump b. Decrease the amount of expected heat removed in the condenser c. Increase the amount of expected net work produced d. Decrease the amount of necessary heat absorbed in the boiler

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QUESTION 12 Match the following. ✓ Engines ✓ Power cycles ✓ Gas cycles ✓Closed cycles ✓ External combustion engines - Internal combustion engines heat pumps ✓ Air conditioners A. the working fluid is returned to the initial state at the end of the cycle and is recirculated B. heat is supplied to the working fluid from an external source such as a furnace, a geothermal well, a nuclear reactor, or even the sun C. D. fluid exists in the vapor phase during one part of the cycle and in the liquid phase during another part. E. the working fluid is renewed at the end of each cycle instead of being recirculated F. used to produce a net power input G. the working fluid remains in the liqid-gaseous phase throughout the entire cycle H. devices or systems used to produce a refrigeration effect 1. devices or systems used to produce a net power output. J. thermodynamic cycles that shows the operation of engines. K. working fluid remains in the gaseous phase throughout the entire cycle. L. heat…

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Water is the working fluid in a Rankine cycle. Steam exits the steam generator at 1500 lbf/in.2 and 1100°F. Due to heat transfer and frictional effects in the line connecting the steam generator and turbine, the pressure and temperature at the turbine inlet are reduced to 1400 lbf/in.2 and 1000°F, respectively. Both the turbine and pump have isentropic efficiencies of 90%. Pressure at the condenser inlet is 2 lbf/ in.2, but due to frictional effects the condensate exits the condenser at a pressure of 1.5 lbf/in.2 and a temperature of 110°F. The condensate is pumped to 1600 lbf/in.2 before entering the steam generator. The net power output of the cycle is 1 x 109 Btu/h. Cooling water experiences a temperature increase from 60°F to 76°F, with negligible pressure drop, as it passes through the condenser.Determine for the cycle:(a) the mass flow rate of steam, in lb/h.(b) the rate of heat transfer, in Btu/h, to the working fluid passing through the steam generator.(c) the percent thermal…

Water is the working fluid in a Rankine cycle. Steam exits the steam generator at 1500 lbf/in.2 and 1100°F. Due to heat transfer and frictional effects in the line connecting the steam generator and turbine, the pressure and temperature at the turbine inlet are reduced to 1400 lbf/in.² and 1000°F, respectively. Both the turbine and pump have isentropic efficiencies of 90%. Pressure at the condenser inlet is 2 lbf/ in.2, but due to frictional effects the condensate exits the condenser at a pressure of 1.5 lbf/in.² and a temperature of 110°F. The condensate is pumped to 1600 lbf/in.² before entering the steam generator. The net power output of the cycle is 5.5 x 108 Btu/h. Cooling water experiences a temperature increase from 60°F to 76°F, with negligible pressure drop, as it passes through the condenser. Determine for the cycle: (a) the mass flow rate of steam, in lb/h. (b) the rate of heat transfer, in Btu/h, to the working fluid passing through the steam generator. (c) the percent…

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