Question

Consider a gas turbine with an intercooler, a reheater and a regenerator. This turbine has a two stage compressor as well as a two stage turbine. For both the compressor and turbine, each stage has a pressure ratio of 3.5 . Note how it says each stage, not total pressure ratio. The compressor presents an isentropic efficiency of 78%, while the turbine's isentropic efficiency is 86%. The effectiveness of the regenerator is 72%. Find the back work ratio and thermal efficiency of the gas turbine. You may use the cold-air-standard assumptions. Take constant specific heats of air at room temperature ( 300 K , Table A-2). This implies h_(b)-h_(a)=c_(p)(T_(b)-T_(a)) for any process. You can also use the isentropic relationships that relate pressure and temperature directly (only valid for isentropic processes). (T_(a))/(T_(b))=((P_(a))/(P_(b)))^((k-1)/(k)) (Sol: BWR 53%, \eta _(th )=39.2% )

          Consider a gas turbine with an intercooler, a reheater and a regenerator. This turbine has a two stage compressor as well as a two stage turbine. For both the compressor and turbine, each stage has a pressure ratio of 3.5 . Note how it says each stage, not total pressure ratio. The compressor presents an isentropic efficiency of 78%, while the turbine's isentropic efficiency is 86%. The effectiveness of the regenerator is 72%. Find the back work ratio and thermal efficiency of the gas turbine.
You may use the cold-air-standard assumptions. Take constant specific heats of air at room temperature ( 300 K , Table A-2). This implies h_(b)-h_(a)=c_(p)(T_(b)-T_(a)) for any process. You can also use the isentropic relationships that relate pressure and temperature directly (only valid for isentropic processes).
(T_(a))/(T_(b))=((P_(a))/(P_(b)))^((k-1)/(k))
(Sol: BWR 53%, \eta _(th )=39.2% )

consider a gas turbine with an intercooler a reheater and a regenerator this turbine has a two stage compressor as well as a two stage turbine for both the compressor and turbine each stage 51075

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