5 Gas turbine cycles Report B

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Energy Conversion, 2014-­‐2015, Prof. Valenti Project 5: Gas Turbine Power Cycles Artoni Alessandro Bortolotti Alberto Cordisco Giuliano Using the software “turbogas” we are going to compare the performance of different gas turbine power cycles, varying the most significant operating parameter and highlighting in which situation some configurations are better and when others. We will focus on the four more used configuration which are: A) Simple gas cycle (SC) B) Intercooled gas cycle (IC) C) Regenerative gas cycle (RC) D) Intercooled and regenerative gas cycle (ICR). Case A (left) and B (right) Case C (left) and D (right) Point 1) keeping fixed the maximum temperature at 1200°C we have changed the pressure in the range (4-­‐90) for case B and (4-­‐40) for all the others. Below we report the tables and the graphs with our results highlighting with the red colour the maximum specific work beta and with the green the maximum efficiency beta. Energy Conversion, 2014-­‐2015, Prof. Valenti 0 5 10 15 20 25 30 35 40 100 200 300 400 Case A Simple Cycle Case A Simple Cycle Case A Usually for industrial purposes we choose to design the cycle with the highest specific work possible in order to have the lowest dimension (more specific work means lower mass flow rate) and thus the lowest cost possible. For aeroderivative cycle instead we chose the beta for which the efficiency is the best since we are only relatively interested in the cost while we strongly need to keep the weight of the fuel as low as possible. Case B β Net spec work [kJ/kg] ηHHV [%] ηLHV [%] 4 241 18,1820,17 6 284,6 22,9825,50 8 309,9 26,1429,01 10 323,9 28,4331,55 12 330,9 30,1233,42 16 333,9 32,4235,98 20 329 33,8837,59 24 320 34,838,62 28 308,9 35,3739,25 32 296,1 35,6239,53 33 292,7 35,6539,56 34 289,3…