ME 200 Summer 2012 Homework 27 Assigned Thursday 26 Jul

ME 200 Summer 2012 Homework 27 Assigned Thursday 26 Jul 2012 Due Monday 30 Jul 2012 @730 am in Room 1130 ME 1. Modern aircraft gas turbine engines have pressure ratios of 30 or higher. Take that value with compressor inlet conditions of 1 bar and 300 K and a turbine inlet temperature of 1700 K and calculate the cycle efficiency. Then calculate the back work ratio. Assume the compressor and turbine are ideal. What is the entropy generation for the compressor and for the turbine? 2. Compressor technology has progressed further than turbine technology so compressor isentropic efficiencies approach 98% while those for turbines are nearer 92%. Repeat all calculations for problem 1 above using these values for hturb and hcomp.
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