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1. Refrigerant 134a enters the compressor of an ideal vapor-compression refrigeration cycle as saturated vapor at 2108F. The condenser pressure is 160 lbf/in.2 The mass flow rate of refrigerant is 6 lb/min. Plot the coefficient of performance and the refrigerating capacity, in tons, versus the condenser exit temperature ranging from the saturation temperature at 160 lbf/in.2 to 908F.
2. To determine the effect of changing the evaporator temperature on the performance of an ideal vapor- compression refrigeration cycle, plot the coefficient of performance and the refrigerating capacity, in tons, for the cycle in Problem 10.11 for saturated vapor entering the compressor at temperatures ranging from 240 to 2108C. All other conditions are the same as in Problem 1.
Three cables are used to tether a balloon as shown. Determine the vertical force P exerted by the balloon at A knowing that the tension in cable AD is 481 N. Use a matrix linear equation solution method.
A system experiences a heat transfer into the system of 50 Btu and does work against the surroundings of 2100 ft-lbf reducing its horizontal velocity from 2 fps to 1.5 fps. The mass of the system is 3 lbm. Determine the amount if change in internal e..
sludge is wet solids that result from the processing in municipal sewage systems. the sludge has to be dried before it
A power outage occurred at a water distribution pump station. Before the power outage the station was pumping with one pump at 6,000 gpm in a 18" diameter Steel Pipe
Air is compressed from 14.7 psia and 60 F to a pressure of 150 psia while being cooled at a rate of 10 Btu/lbm by circulating water through the compressor casing. the volume flow rate of the air at the intel conditions is 5000 ft^3/min, and the power..
natural gas is flowing in a 20 inch sch 40 carbon steel pipeline that is 300 miles long. there is a gas compressor at
determine the headwater depth of a 1000 mm high by 1500mm wide concrete box culvert operating under outlet control
The ground- water table was located at a depth of 2 m below the ground surface. Given, for the sand: gd 5 14.5 kN/m3 and gsat 5 19.8 kN/m3. The contact stress during the test was 260 kN/m2. Estimate the soil friction angle, f9.
a convergent-divergent nozzle with an exit-to-throat area ratio of 1.616 has exit and reservoir pressures equal to
Design a discrete (Z-domain) proportional plus integral plus derivatives (PID) controller for the type-1 plant derived from Lab 2. The controller should satisfy the following specifications:
A thin-walled concentric tube heat exchanger is used to cool engine oil from 175 °C to 55 °C with water that is available at 27 °C acting as a coolant. The oil and water flow rates are each 2.5 kg/s and the diameter of the inner tube is 0.7 m with a ..
a rigid container of volume 1 m3 contains 16.13 kg of h2o of an unknown phase. the pressure of the h2o is initially 7
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