4. A Rankine cylce operates between pressures of 2 psia and 1500 psia. If the steam...

4. A Rankine cylce operates between pressures of 2 psia and 1500 psia. If the steam entering the turbine is superheated to 800^oF, calculate the efficiency of the cycle. Neglect pump work. Note: The peak of the superheat phase of this cycle is outside the range of the text steam tables and is difficult to locate on the text Mollier chart since it does not have a 1500 psia constant pressure line. Please use the following information taken from the Combustion Engineering steam tables. At 1500 psia and 800 ^oF, the steam would have an h = 1364 Btu/lbm and an s = 1.5073 Btu/lbm ^oR. You should be able to find the value of h at 2 psia and an s = 1.5073 Btu/lbm ^oR from the text steam tables or the Mollier chart. Then you can calculate the parameters requested by questions 4 and 5.

State your answer as a percent to one decimal place. Example: 35.2

5. A Rankine cycle operates between pressures of 2 psia and 1500 psia. If the steam entering the turbine is superheated to 800^oF, calculate the work produced per pound mass of steam. Neglect pump work.

State your answer to two decimal places. Example:125.25

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Expert Solution

samet mamat answered 2 years ago

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