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Consider a non-ideal vapor-compression cycle where Refrigerant 134a flows at a rate of 0.05 kg/s. The refrigerant enters the compressor at -10 °C, 0.14 MPa, and exits at 0.7 MPa. The isentropic compressor efficiency is 80%. Neglect pressure drops at the condenser and evaporator. The refrigerant leaves the condenser at 0.7 MPa, 26 °C. Ignoring heat transfer between the compressor and its surroundings, determine:
(a) the rate at which heat energy is removed from the refrigerated space, in kW,
(b) the coefficient of performance.
a wind turbine with a swept area of 1000 m2 operates with 56 efficiency under stp conditions. at the location of the
Air at 90 kpa and -7 C enters an adiabatic diffuser steadily with a velocity of 180 m/s and leaves with a low velocity at a pressure of 100 kpa. The exit area of the diffuser is 5 times the inlet area. Determine (a) the exit temperature and (b) th..
water is the working fluid in a vapor power cycle with superheat and reheat. superheated vapor enters the first turbine
two particles a and b start from rest at the origin s0 and move along a straight line such that aa8t-4 fts2 and
Calculate the head provided by the pump and Calculate the brake power required if the pump efficiency is 75% (kW).
consider an ideal steam cycle that combines the reheat cycle and the generative cycle. the net power output of the
A piston-cylinder device initially contains 50L of liquid water at 40 degrees C and 200kPa. Heat is transferred to the water at constant pressure until entire liquid is vaporized.
please use ees to solve this problem.one method for storing hydrogen involves cooling it so that it liquefies. figure
determine the power needed to drive the low speed turbine given maximum velocity in the test section 140 mih with 12 x
a rectactangular surface is placed in a vertical position in fresh water with its top and bottom edges horizontal. if
260-pound weight is supported by two ropes, one forming a 40 degree angle with the ceiling and the other a 50 degree. Find the tension in each rope.
a construction vehicle of mass 30 mg is used to unload sand in a horizontal line through a port on the bottom of the
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