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A gas refrigeration system using air as the working fluid has a pressure ratio of 5. Air enters the compressor at 0 Celsius. The high-pressure air is cooled to 35 Celsius by rejecting heat to the surroundings. The refrigerant leaves the turbine at ( - 80 C ) and then it absorbs heat from the refrigerated space before entering the regenerator. The mass flow rate of air is 0.4 kg/s. Assuming isentropic efficiencies of 80 percent for the compressor and 85 percent for the turbine and using constant specific heats at room temperature, determine (a) the effectiveness of the regenerator, (b) the rate of heat removal from the refrigerated space, and (c) the COP of the cycle. Also, determine (d) the refrigeration load and the COP if this system operated on the simple gas refrigeration cycle. Use the same compressor inlet temperature as given, the same turbine inlet temperature as calculated, and the same compressor and turbine efficiencies.
an insulated mixing chamber receives 4 lbms r-134a at 150 lbfin.2 220 f in a line with low velocity. another line with
How may data be managed to support a function (billing, human resources, accounting, finance, sales/marketing, training)?
refrigerant-134a is being transported at .1kgs through a teflon tube of inside diameter di 25mm and outside diameter
a balloon weights 250 pounds and has a volume of 14000 cubic feet. it is filled with helium which weights 0.0112 pound
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SEM212 - Aim of this demonstration is to use measurements of the load required to propagate a crack (tear) in packaging tape to determine its fracture toughness.
the ball at is kicked such that 60 . if it strikes the ground at having coordinates 25 -25 determine the speed at
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