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An electrical window air conditioner with a cooling capacity of of 8000 kJ/hr draws 6.00 amps of electrical current at 120 volts and maintains the cooled space at a constant 20 oC. The outdoor temperature is a constant 42 oC. The electricity price is $0.15/kwhr. Find the actual cycle coefficient of performance, the rate of waste heat rejection (kJ/hr) and electrical cost per hour. Repeat/Compare results for COP, waste heat rate (kJ/hr) and operating cost ($/hr) for a Carnot refrigeration cycle with the same cooling capacity.
air at 1.0 atmosphere pressure and 77 0c enters a 5.0 mm i.d. tube with a bulk average velocity of 2.5 ms. the velocity
air is compressed adiabatically from 14.7 psia 70 to 58.8 psia and 76 btulbm of work is required. neglecting changes
The link lies in a plane parallel to the y-z plane and the bearings are properly aligned on the shaft.
Entropy Generation in a Steam Turbine, Steam at a rate of 15lbm/s enters a turbine at 500 Psia, 800f and exits at 5 Psia. For a reversible, adiabatic process (iseentropic)
water pressure of 10 kpa is pumped to a pressure of 4mpa. what is minimum energy requirement of the pump in kjkg.
Evaluate the reduction in pump BHP required by heating the oil from 50° F to 100° F. Suppose efficiency of 80% (HP)
Calculate the magnitude of the moment about the base point O of the 600 N force and calculate and draw the shear force and bending moment diagram for the cantilever beam
Determine the force in member BC. After the truss is sectioned use a single equation of equilibrium for the calculation of each force. State if these member is in tension or compression. Take F1 = 2 kN , F2 = F3 = 3.8kN , F4 = 5 kN, F5 = 3 kN.
The uniform rectangular plate is released from rest in the position shown. Determine the maximum angular velocity during the ensuing motion. Friction at the pivot is negligible.
Find the transfer function for the following impulse response
a sky diver with a mass of 70 kg jumps from an aircraft. the aerodynamic drag force acting on the sky diver is known to
a first class lever in static equilibrium has a 50lb resistance force and 15lb effort force. the levers effort force is
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