Compute the maximum coefficient of heat pump
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. Calculate the maximum Coefficient of this heat pump.
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Helium in a steel tank is at 40 psia, 540 R with a volume of 4 ft3. It is used to fill a balloon. When the tank pressure drops to 24 psia the flow of helium stops by itself.
Determine the maximum centric force which can be applied is the allowable normal stress is 160 MPa in the steel and 18 MPa in the concrete where length = 1.5m and Diameter = 450mm.
Determine the maximum sustainable torque that the tubular shaft can handle. Determine the maximum sustainable power that the solid circular shaft can handle without failing
What is the Carnot efficiency for this additional cycle? Assuming the actual device has an efficiency of half of the Carnot efficiency, how much additional electric power would be generated?
K of the particle board is .170 W/mK. Estimate the heat flux through the wall and plot the temperature distribution through the composite wall.
It is desired to compare the results of property predictions for water near or in the saturation region using the ideal gas equation, the compressibility chart.
A computer cooled by a fan contains eight PCBs, each dissipating 10W power. The height of the PCBs is 12 cm and the length is 18 cm. The cooling air is supplied by a 25 W fan mounted at the inlet.
Estimate the steady-state heat loss from the pipe (in W/m) when the oil is at 90 degrees Celcius. Ignore the inside thermal resistance.
When drilling a hole in a table leg, a furniture maker uses a hand-operated drill with a bit of diameter d=4.0mm. If the resisting torque supplied by the table leg is equal to 0.3 Nm, what is the maximum shear stress in the drill bit?
Determine the fraction of the input heat used to i. preheat the liquid feed water to the saturation temperature of 165C ii. evaporate the water iii. superheat the water vapor to its final exit temperature.
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