Find the exit pressure and the second-law efficiency
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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.
Suppose you deposit $1,000 into a savings account that earns interest at the rate of 4%, compounded annually.
Find the exergy at the initial and final states and the destruction of exergy in the process.
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