Bananas are to be cooled from 28°c to 12°c at a rate of 1140 kg/h by a refrigerator that operates on a vapor-compression refrigeration cycle. the power input to the refrigerator is 9.8 kw. determine (a) the rate of heat absorbed from the bananas, in kj/h, and the cop, (b) the minimum power input to the refrigerator, and (c) the second-law efficiency and the exergy destruction for the cycle. the specific heat of bananas above freezing is 3.35 kj/kg·°c.

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

Afour cylinder four-stroke in-line engine has a stroke of 160mm, connecting rod length of 150mm, a reciprocating mass of 3kg and its firing order is 1-3-4-2. the spacing between cylinders is 100mm. i. show that the engine is in balance with regard to the primary inertia forces and primary 3. a and secondary inertia couples. li determine the out of balance secondary inertia force ii. propose ways of balancing this out of balance force and discuss the challenges that will arise

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody