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An air conditioning unit with refirigerant-134a as the working fluid is used to keep a room at 26 degrees celcius by rejecting the waste heat to the outdoor air at 34 degrees celcius. The room air gains heat through the walls and the windows at a rate of 250 kJ/min while the heat generated by the computer, tv, and lights amounts to 900 W. THe refrigerant enters the compressor at 500 kPa as a saturated vapor at a rate of 100 L/min and leaves at 1200 kPa and 50 degrees celcius. Determine (a) the actual COP, (b) the maximum COP, and (c) the minimum volume flow rate of the refrigerant at the compressor inlet for the same compressor inlet and exit conditions.
the velocity field v -axi byj can be interpreted to represent flow in a corner. obtain the equation for the flow
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determine the electrical power input to the pump. the density of water is 1kg/l.
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A dockworker applies a constant horizontal force of 71.0 to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 11.5 in a time 5.00 . what is the mass of the ice block?
Irrigation system
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a steam power plant operates on an ideal reheat rankine cyclenbspbetween the pressure limits of 9mpa and 10kpa. the
an aircraft is slowed after landing by dual parachutes deployed from the rear. each parachute is 3.66m in diameter. the
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