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1. A piston-cylinder device contains 15 kg of refrigerant - 134a at 0.24 MPa and 70oC. The R-134a is now cooled at constant pressure until it is a saturated liquid at approximately -5.4°C. Determine the amount of heat loss/gain, the work done and show the process on a T-V diagram.
2. 20 kg of R-134a initially at 1.01,1Pa and 130°C is contained in a rigid-cylinder device. The refrigerant is cooled at constant pressure until it exists as a saturated vapor at approximately 26°C. Determine the amount of heat loss, the work done and show the process on a T-V diagram.
3. R-134a at 1.2 MPa and 100°C enters an adiabatic turbine steadily at 1.0 kg/s and a velocity of 20 m/s and leaves at 0.1 MPa and 0°C. Determine the exit velocity if the work done by the turbine is 0.5 MW and the change in potential energy is zero.
3. Stearn enters a turbine with negligible velocity, at 4 MPa, 600°C and a flow rate of 36.000 kg/h. It leaves the turbine at 15 kPa with a velocity of 300m/s and a quality of 0.5. Determine the heat loss or gain for the steam as it passes through the turbine if the turbine has a power output of 200.000 kW (kJ/s).
the dislocation density of a specific steel is 1012cm2. one c atom per atomic sites along a dislocation line is
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What are the critical temperatures and pressures for Air, Ammonia, CO2 and Propane? Determine the specific volume of Air, Ammonia, CO2 and Propane at 1000C and 20 bar. Determine the specific volume of Air, Ammonia, CO2 and Propane at 1000C and 20 bar..
Using the data in Problem , Meredith and Smunt Manufacturing expects sales of pumps to grow by 10% next year. Compute next year's sales and the sales for each quarter.
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