Find the plant-s thermal efficiency
A utility plant runs an ideal Rankine cycle with water. The boiler pressure is 3.0 MPa and the cycle has a high temperature of 450 °C and its low temperature is 45 °C. Find the plant's thermal efficiency.
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A manometer attached to the cylinder indicates a pressure of 620 mmHg above atmosphere. Determine: (a) The absolute pressure of the gas in the vessel, (b) The specific volume of the gas.
Air at 50 psia and 90 F flows at the rate of 1.6 lbm/s through an insulated turbine. If the air delivers 11.5 hp to the turbine blades, at what temperature does the air leave the turbine?
What is the amount of shaft work produced by a typical IC engine per gallon? The remainder of the energy released in the combustion is in the form of heat.
Calculate the rate of heat transfer to the room and the air. Include both natural convection and radiation. Repeat the calculation for an emissivity value of 0.1.
The Cartesian velocity components are u=Vcosine(alpha) and Vsin(alpha). Generate an expression for the stream function for this flow.
A-2-m by 1.5-m section of wall of an industrial furnace burning natural gas is not insulated, and the temperature at the outer surface of this section is measured to be 80 C.
The temperature at the center plane of the material is 62oC, and the heat flow through the material is 1 kW. Obtain an expression for the thermal conductivity of the material as a function of temperature.
What is the external force in N for this particular process at state 1, state 2 and an intermediate state at P1 = 1.5bars? The piston area is 0.05 m^2.
A following process expands the gas at constant pressure to three times the initial volume. What is the specific work in the combined process?
A piston-cylinder device contains 0.8 kg of an ideal gas. The gas is cooled at constant pressure until its temperature decreases by 10C. Calculate change in internal energy (kJ) of the ideal gas.
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