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Reconsider Prob. 11-15. Using EES (or other) software, investigate the effect of evaporator pressure on the COP and the power input. Let the evaporator pressure vary from 100 to 400 kPa. Plot the COP and the power input as functions of evaporator pressure, and discuss the results.
Prob. 11-15
Consider a 300 kJ/min refrigeration system that operates on an ideal vapor-compression refrigeration cycle with refrigerant-134a as the working fluid. The refrigerant enters the compressor as saturated vapor at 140 kPa and is compressed to 800 kPa. Show the cycle on a T-s diagram with respect to saturation lines, and determine
(a) the quality of the refrigerant at the end of the throttling process,
(b) the coefficient of performance, and
(c) the power input to the compressor.
calculate the alkalinity as CaC03 of water that contains 85mg/l of HCO3, 120 mg/l of CO3 and 2 m/l of OH.
Shaquille O Neal, who is listed as 7`1" tall is out of the NBA Playoffs and so has time to visit is pool. If he stands vertically in the water, completely submerged, determine the difference between the pressure is acting at his head and at his toes,..
Using the Gumbel probability function, estimate the probability that a maximum 24 hour depth in any year will exceed 160 mm. What is the probability that the maximum 24 hour depth will exceed 125 mm
Two vessels are connected to a differential manometer using mercury (s=13.56), the connecting tubing being filled with water. The higher-pressure vessel is 5 ft lower in elevation than the other
Determine the elastic and plastic section modulus of the I-beam. The axis runs through the center of the beam on both x and y axis (completely symmetrical). Beam properties: h= 12inches tf= 0.5 inches bf= 6 inches tw= 0.25 inches
The base line vector between the base and roving reciever is 8340m and has an accuracy of +/-(1to 2 cm +/-2ppm). What is the estimated uncertainty in the length of this vector
compose a list here of the geological terms that you encounter in this reading that you could not define and explain in a test situation.
The tank is insulated on the outside and the partition between the two sections is also an insulator. The partition can withstand a pressure differential across it of 400 kPa, before rupturing.
A student is trying to test the braking ability of her car determined that she needed 18.5 ft more to stop her car when driving downhill on a road segment of 5% grade than when driving downhill at the same speed along another segment of 3% grade.
A pile resists the tension developed by three stay cables for a major for a tent (membrane) structure. Assuming no bending is desired in the pile (no resultant horizontal componenet), what is the magnitude of the force S if the and (theta sub S)
water from a treatment plant is pumped into distribution system at a rate of 4.38 m^3/sec, a pressure of 480 kpa and a temperature of 20 degree celcius. The pipe has a diameter of 750 mm and is made of ductile iron
Consider a simply supported beam with a uniformly distributed load q AND a concentrated load P at midspan. Solve for dv/dx and v using differential equations.
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