Wasted hot air (considered as an ideal gases) with a temperature of 627 o c (state 1), flows at 2.0 kg/s through an adiabatic heat exchanger (which is a closed heat exchanger & no mixing), leaving at 377 o c (state 2). it exchanges heat with the stream of water entering at 7 bars and h3=697.22 kj/kg (state 3), assuming each line flow steadily, and negligible of kinetic and potential energy changes. solve and answer both case i and case ii. (all sub-questions are 4 points, except 6 points of each sketch). t (k) = t(o c)+273. case a only

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

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