Unit No. 6 at The Geysers produces 52 MW of power at the generator from a steam flow of 417,000 kg/h at a pressure of 6.9 bar and a temperature of 182°C. The reservoir conditions are known to be 32.3082754 bar and 238°C. The turbine exhaust pressure 2. (condenser pressure) is 0.13 bar. (a) Sketch the location of the reservoir and turbine-inlet state points on the attached Mollier chart (h-s). The requested states should be placed on this h-s diagram. What do you observe about the enthalpy of these two states? What do you notice about these values relative to the maximum enthalpy along the saturated vapor line? (b) On the same diagram, locate the turbine exhaust state. Calculate the turbine isentropic expansion efficiency, 71 . Calculate the overall geothermal energy utilization efficiency, 7u, based on (i) reservoir and (ii) turbine-inlet conditions. A sink temperature of 48°C is appropriate for Unit No. 6.

Unit No. 6 at The Geysers produces 52 MW of power at the generator from a steam flow of 417,000 kg/h at a pressure of 6.9 bar and a temperature of 182°C. The reservoir conditions are known to be 32.3082754 bar and 238°C. The turbine exhaust pressure 2. (condenser pressure) is 0.13 bar. (a) Sketch the location of the reservoir and turbine-inlet state points on the attached Mollier chart (h-s). The requested states should be placed on this h-s diagram. What do you observe about the enthalpy of these two states? What do you notice about these values relative to the maximum enthalpy along the saturated vapor line? (b) On the same diagram, locate the turbine exhaust state. Calculate the turbine isentropic expansion efficiency, 71 . Calculate the overall geothermal energy utilization efficiency, 7u, based on (i) reservoir and (ii) turbine-inlet conditions. A sink temperature of 48°C is appropriate for Unit No. 6.

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter45: Domestic Refrigerators And Freezers

Section: Chapter Questions

Problem 20RQ: Welded ______sealed compressors are normally used in household refrigerators.

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Welded ______sealed compressors are normally used in household refrigerators.
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