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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.
in a pharmaceutical plant a copper pipe kc 400 wm.k with inner diameter of 20 mm and wall thickness of 2.5 mm is used
question a 80 g frisbee is thrown from a point 0.71 m above the ground with a speed of 10 ms. when it has reached a
a force p acts on a block having a mass of m with the block resting on a rough incline. the coecients of static and
A plane can fly 305 mph in still air. If it can fly 185 miles downwind in the same amount of time it can fly 120 miles upwind, find the velocity of the wind.
a four-cylinder four-stroke 2.8-liter compression-ignition engine operates on the ideal dual cycle with a compression
an ideal gas is compressed from a volume of 400 cm3 to a volume of 150 cm3 slowly and isothermally in a
the maximum allowable value of each of the reactions is 180 N neglecting of the weight of beam, determine the range of te distance d for which the beam is safe.
a boom for a crane is shown in the horizontal position. if w1kn determine the force for supporting memebers ac ab ad
A 40 mm diameter hole is drilled 3 m deep into the steel shaft. When the two torque are applied, determine (a) the maximum shear stress in the shaft: and (b) the angle of rotation of the free end of the shaft. Use G= 83GPa for steel.
the reynolds number of a fluid flowing through a 5-cm-diameter, square-edged orifice plate meter within a 15-cm pipe is 250,000. Find the discharge coefficient for flange taps.
water is pumped from a lake to a storage tank 20 m above at a rate of 70 ls while consuming 20.4 kw of electric power.
a 6 nominal pipe size schedule 40 steel pipe has a chamfered entrance and 300 ft. long. the velocity is 20 ft per sec.
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