Neglecting the changes in kinetic and potential

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Unformatted text preview: , she reasons, the entropy of the steam will decrease, the performance of the turbine will improve, and as a result the work output of the turbine will increase. How would you evaluate this proposal? 7–80C It is well known that the power consumed by a compressor can be reduced by cooling the gas during compression. cen54261_ch07.qxd 11/18/03 9:58 AM Page 339 339 CHAPTER 7 Inspired by this, somebody proposes to cool the liquid as it flows through a pump, in order to reduce the power consumption of the pump. Would you support this proposal? Explain. 7–81 Water enters the pump of a steam power plant as saturated liquid at 20 kPa at a rate of 45 kg/s and exits at 6 MPa. Neglecting the changes in kinetic and potential energies and assuming the process to be reversible, determine the power input to the pump. 7–82 Liquid water enters a 10-kW pump at 100-kPa pressure at a rate of 5 kg/s. Determine the highest pressure the liquid water can have at the exit of the pump. Neglect the kinetic and potenti...
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This document was uploaded on 11/28/2012.

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