A Brayton-refrigeration cycle with a regenerative heat exchanger operates with a compressor and turbine at 86% efficiency. The compressor receives air at 480°R, 14.7 psi which is compressed to 40 psi. Compressed air enters the regenerative heat exchanger at 540°R and cools down to 480°R before entering the turbine. If the refrigeration capacity is 15 tons, calculate: the volume flow rates entering the compressor and turbine. the coefficient of performance.

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

When using the ohmmeter function of a digital multimeter, the leads are placed in what position relative to the component being tested? a. parallel b. control c. series d. line

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10