Apple juice is being concentrated in a natural-circulation single effect evaporator. At steady-state conditions, the feed is dilute juice at 11% total solids, and enters the evaporator at a rate of 0.67 kg/s, where it is concentrated to 75% total solids. The specific heats of the dilute juice and the concentrate are 3.9 and 2.3 kJ/kg.C respectively. The supply steam pressure is measured at 273.7 kPa. The inlet feed temperature is 43.3 C and the product boils in the separation chamber at 62.2C. Assuming a negligible boiling point elevation, calculate a) the flow rate of the concentrated juice (in kg/s) (Ans: 0.098 kg/s) b) the required vapour flowrate (Ans: 0.572 kg/s) d) the overall heat transfer coefficient, if the available heat transfer surface area is 20.4 m2 (Ans:888.5 W/m2c)