Find the irreversibility and the second-law efficiency
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Find the second-law efficiency for the compressed air system in Problem 8.65. Consider the total system from the inlet to the final point of use.
Estimate the residual income and the present value of residual income for the eight years.
A turbine receives steam at 3000 kPa, 500oC and has two exit flows, one at 1000 kPa 350oC with 20% of the flow. Find the isentropic and second-law efficiencies.
A heat engine operating in an environment at 298 K produces 5 kW of power output with a first law. Compute all the energy and exergy transfers in and out.
A compressor is used to bring saturated water vapor at 1 MPa up to 15 MPa where actual exit temperature. Find the irreversibility and the second-law efficiency.
How much will Fred be willing to lend to Ted in return for $1,000 two years from now if he uses a compounded interest rate per year.
The actual specific work is 210 kJ/kg, and the isentropic efficiency is 82%. Find the exit pressure and the second-law efficiency.
After the two periods, how much interest has been paid on the principal amount?
A steam turbine receives 5 kg/s steam at 400oC, 10 MPa. One flow of 0.8 kg/s is extracted at 3 MPa as saturated. Find the second-law efficiency of the turbine.
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