Hmk4 - ME 323 Problem Set 4 AU 08 October 10, 2008 Due:...

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AU 08 October 10, 2008 Problem Set 4 Due: 10/20/2008 1. A steam turbine is used to drive a nitrogen compressor. The states are shown in the drawing below, and the flow rates are 0.25 kg/s and 0.04 kg/s through the turbine and compressor, respectively. Heat transfer from the turbine is negligible. The turbine delivers 42 kw to the compressor and the balance of its power output to an electric generator. Determine: a. The power (kw) available to drive the generator. b. The rate of heat loss (kw) as the nitrogen flows through the compressor and aftercooler. 2. It is proposed to use a geothermal supply of hot water to operate a steam turbine, as shown in the drawing below. The high pressure water at 1.5 MPa, 180 degrees C is throttled into an insulated flash evaporator, forming liquid water and vapor at 400 kPa. The liquid water drains from the bottom of the evaporator, and the vapor is drawn off and fed to the steam turbine. Steam exits the turbine at 10 kPa (absolute), 90% quality. If the turbine produces a power of 1 MW, determine how much hot
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Hmk4 - ME 323 Problem Set 4 AU 08 October 10, 2008 Due:...

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