The food compartment of a refrigerator is maintained at 4 c by moving heat from it at a rate of 360 kj/min. if the required power input to the refrigerator is 2 kw, determine:

(a) the coefficient of performance of the refrigerator and
(b) the rate of heat rejection to the room that houses the refrigerator.

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.