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Steam enters a turbine with an isentropic efficiency of 83.0% at 300. psia, 800.°F and exhausts to a condenser at 0.250 psia. The boiler feedwater is heated in a single, open loop regenerator with steam extracted from the turbine at 100. psia. Saturated liquid leaves the regenerator at the pressure of the extraction steam. Neglecting all pump work, determine
a. The percent mass flow of steam extracted from the turbine.
b. The turbine power output per unit mass flow of steam.
c. The system thermal efficiency.
d. The turbine power output per unit mass flow of steam when the regenerator is not in use.
e. The system thermal efficiency when the regenerator is not in use.
f. The percent increase in system thermal efficiency produced by the regenerator.
A gas of 1.40×1020 atoms or molecules has 1.50J of thermal energy. Its molar specific heat at constant pressure is 20.8 J/mol K. What is the temperature of the gas
a. questions for weekly discussions and conversations not part of the required discussion board assignmentthese
Some skin divers go as deep as 50 m. What is the gage pressure at this depth in fresh water, and what is the ratio of absolute pressure at this depth to normal atmospheric pressure.
One runner ran the 100-m dash in 11.9 s. Another runner came in secona at 12.4 s. Assuming that the runners traveled at their average speeds for the entire distance, determine the sepaaration between the two runners when the winner crossed the fin..
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What is the oxidation time in seconds.- - What is the capacitance of the oxide layer per unit area, C°, in pF/cm2?
an astronomer is using a telescope to observe two distant stars. the stars are marginally resolved when she looks at
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