ME312hw3 - ME 312 HOMEWORK SET#3 Spring 2009 TEAM PROJECT...

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Unformatted text preview: ME 312 HOMEWORK SET #3 Spring 2009 TEAM PROJECT * Include a title page with the name and signature of each team member (no more than 3 in a team) * Show all equations used in the analysis and include all programming files used to obtain the solutions. (The ideal air tables are not necessary). * Total score of 100 points ( includes 15 points for neatness and presentation). * Due: Tuesday 28 April A regenerative gas turbine cycle with intercooling and reheat operates at steady state. Air enters the compressor at 1 bar and 295 K with a mass flow rate of 4.601 kg/s. The pressure ratio across the 2-stage compressor is 6. The intercooler and reheater operate at a constant pressure of 3 bar. The inlet temperature of each compressor stage and turbine stage is 295 K and 1020 K, respectively. The isentropic efficiencies are 84% and 87% for each compressor and turbine, respectively. The regenerator effectiveness is 80% and T0 = 290 K. a) Include a schematic of the cycle and show the process on a T-s diagram b) Find the net power generation in kW, cycle efficiency, back-work ratio and the cycle effectiveness and compare your results to a simple Brayton cycle: (kW) Regenerative Brayton Cycle Simple Brayton Cycle with Intercoolin & Reheat ' esults of Homework #2 Cycle Efficiency flrcyae (%) Cyclemecfivmss <%> —— Back-Work Ratio (%) Power Produced c) Show an exergy balance for the cycle G) d) Plot the cycle effectiveness as a fianction of the “top” pressure the combustion chamber in the range of 4 < Pm], < 12 bar. On the same graph, compare the results for “top” temperatures at the combustion chamber outlet of 1020 K, 1150 K and 1250 K. Comment on your results. ...
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