An automobile radiator may be viewed as a cross-flow heat exchanger with both fluids unmixed. Water enters the radiator at a flow rate of 0.05 kg/s and a temperature of 400 K, and leaves the radiator at 330 K. The water is cooled by air that enters at a rate of 0.75 kg/s with a temperature of 300 K. (a) If the overall heat transfer coefficient is 200 W/m2K, what is the required heat transfer surface area

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

Machinery that is a key part of the process and without which the plant or process cannot function is classifed as: (clo4) a)-critical machinery b)-essential machinery c)-general purpose machinery d)-none of the specified options.

Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.