Chickens with an average mass of 2.2 kg and average specific heat of 3.54 kj/kg • °c are to be cooled by chilled water that enters a continuous-flow-type immersion chiller at 0.5°c. chickens are dropped into the chiller at a uniform temperature of 15°c at a rate of 500 chickens per hour and are cooled to an average temperature of 3°c before they are taken out. the chiller gains heat from the surroundings at a rate of 200 kj/h.

determine :

(a) the rate of heat removal from the chicken, in kw, and

(b) the mass flow rate of water, in kg/s, if the temperature rise of water is not to exceed 2°c.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

The proportional limit is always greater than the yield strength for a material. a)-trune b)- false

Acommercial grade cubical freezer, 4 m on a side, has a composite wall consisting of an exterior sheet of 5.0-mm thick plain carbon steel (kst= 60.5 w/m k), an intermediate layer of 100-mm thick polyurethane insulation (kins 0.02 w/m k), and an inner sheet of 5.0- mm thick aluminium alloy (kal polyurethane insulation and both metallic sheets are each characterized by a thermal contact resistance of r 2.5 x 104 m2 k/w. (a) what is the steady-state cooling load that must be maintained by the refrigerator under conditions for which the outer and inner surface temperatures are 25°c and -5°c, respectively? (b) for power saving purpose, which wall material should be increased/reduced in. thickness in order to reduce 50% of the cooling load found in part (a)? redesign the thickness of the proposed material. 177 w/m-k). adhesive interfaces between the q=575.93 w