The chilling room of a meat plant is 15 m × 18 m × 5.5 m in size and has a capacity of 350 beef carcasses. The power consumed by the fans and the lights in the chilling room are 22 and 2 kW, respectively, and the room gains heat through its envelope at a rate of 14 kW. The average mass of beef carcasses is 220 kg. The carcasses enter the chilling room at 35°C, after they are washed to facilitate evaporative cooling, and are cooled to 16°C in 12 h. The air enters the chilling room at 22.2°C and leaves at 0.5°C. Determine

(a) The refrigeration load of the chilling room

(b) The volume flow rate of air. The average specific heats of beef carcasses and air are 3.14 and 1.0 kJ/kg·°C, respectively, and the density of air can be taken to be 1.28 kg/m³.