4. A Rankine cylce operates between pressures of 2 psia and 1500psia. If the steam entering the turbine is superheated to800oF, calculate the efficiency of the cycle. Neglectpump work. Note: The peak of the superheat phaseof this cycle is outside the range of the text steam tables and isdifficult to locate on the text Mollier chart since it does nothave a 1500 psia constant pressure line. Please use the followinginformation taken from the Combustion Engineering steam tables. At1500 psia and 800 oF, the steam would have an h = 1364Btu/lbm and an s = 1.5073 Btu/lbm oR. You should be ableto find the value of h at 2 psia and an s = 1.5073 Btu/lbmoR from the text steam tables or the Mollier chart. Thenyou can calculate the parameters requested by questions 4 and5.
State your answer as a percent to one decimal place. Example:35.2
5. A Rankine cycle operates between pressures of 2 psia and 1500psia. If the steam entering the turbine is superheated to800oF, calculate the work produced per pound mass ofsteam. Neglect pump work.
State your answer to two decimal places. Example:125.25
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