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10 kg of gaseous oxygen is compressed in a piston-cylinder device from an initial state of .8 m^3/kg, to a final state of .1 m^3/kg, 287 deg C, with all heat transfer taking place with the surroundi
If heat is also transferred to the cooler from the surroundings (at 15 deg C) at 25o kW, find the rate of heat transfer from the ball bearings and the rate of production of new disorder in this quen
Two flows of H2O, one of which is saturated vapor at .6 MPa and the other of which is at .6 MPa, 600 deg C, mix adiabatically in a steady-flow process to produce a single outflow at .6 MPa, 400 deg
It is estimated that the isentropic efficiency of the turbine is 70%. What is the maximum turbine inlet pressure if the exhaust is not to be in the two-phase region?
Steam flows steadily into a turbine at 2 MPa and 400 deg C, at a flow rate of 25 kg/s. If the turbine is adiabatic and the steam leaves the turbine at 100 kPa, what is the maximum power output of t
The tank then cools to the ambient temperature, at which point the pressure is 5 MPa. Find P2 an PS for the overall process. Assume air is an ideal constant-Cv0 gas.
Consider an air-standard Brayton cycle. What is the efficiency of the Brayton cycle if the pressure ratio is 20 and the specific heat ratio is 1.4?
Consider an air-standard Otto cycle. What is the efficiency of the Otto cycle if the compression ratio is 10 and the specific heat ratio is 1.4?
In a cogeneration scheme, a Diesel engine-generator is used. The Diesel engine-generator is rated at 2000 kWe. What is the total efficiency of the cogeneration scheme?
Steam at 35 bar and 600 degree K enters a throttling valve that reduces the steam pressure to 7 bar. Assuming there is no heat loss from the valve, what is the exit temperature of the steam and its
Design considerations limit the maximum normal stress is 74 ksi, th maximum shearing stress is 40 ksi, the maximum normal strain to 2200 uin/in and the maximum shearing strain to 2500 ur ad . What i
Find the time required for the machine to decelerate to 100 mph in standard air. What assumption did you have to make, and was this assumption valid?
At what point on the plate does the flow become transitional? Assume a unit width for the plate. Show the equations you used in addition to your plot.
Determine the terminal velocity of a 75-mm diameter sphere made of solid aluminum (specific weight=26.6KN/m^3) in free fall in (a) castor oil at 25 degrees C, (b) water at 25 degrees C
Oxygen at 100 kPa, 27°C is compressed to 1 MPa in an adiabatic compressor whose isentropic efficiency is 0.80. Calculate the oxygen temperature at the compressor outlet is?
R134a is condensed at a constant temperature of 30°C as it flows through the condenser of a refrigerator by rejecting heat at a rate of 6 kW.
Helium gas expands in an adiabatic turbine from 2 MPa and 750°C to 0.18 MPa at a rate of 1.5 kg/s. Assuming constant specific heats at room temperature, calculate the maximum power output of th
Compute the percentage change in the volume of the oil in the system as the pressure is increased from zero to 3000 psi if the bulk Modulus of the oil is 189000 psi ( 1303 Mpa).
What are the wall temperatures at that location and at the 10. 3 ft location? Calculate the arithmetic-mean temperature difference and the log-mean temperature difference for the heated section.
Two steel (E=30,000 ksi) pipes (1) and (2) are connected at flange B. Pipe (1) has an outside diameter of 6.625 in. The maximum downward load P that may be applied at flange B.
An air conditioner running with R-134a on a cycle executed under the saturation dome between the pressure limits of 0.8 MPa and 0.12 MPa.
A heat pump absorbs heat from the cold outdoors at 3 C and supplies heat to a house at 20 C at a rate of 30,000 kJ/h. If the power consumed by the heat pump is 3 kW, find the coefficient of performa
Determine all of the state points and the efficiency. What is the temperature, pressure, and enthalpy of all states(1,2,2a,2b,3,4)?
In a water heating system, cold water at 5 C flowing at a rate of 5 kg/s is mixed adiabatically with hot water at 80 C flowing at a rate of 2 kg/s, state the assumptions.
Estimate the heat transfer area of the heat exchanger. Assume that the ocean water has the same density and specific heat as those of typical water.