(6) Milk is to undergo UHT (ultra high temperature) processing with a concurrent tubular heat exchanger...

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(6) Milk is to undergo UHT (ultra high temperature) processing with a concurrent tubular heat exchanger used as the method of heating. UHT low fat (2%) fluid milk is to be produced at 5000 kg/h (with a desired time/temperature of 2 seconds at 150C*). Milk with an initial temperature of 15C is fed to the heat exchanger and steam at 543.1 kPa and 100% quality is used as the heating media. Condensate at 155C flows from the steam trap. What is the required flow rate of steam to the heat exchanger? The composition of 2% low fat milk is given as: 89.2% moisture (Cp 4.187 kJ/kg/C); 3.3% protein (C, 1.549 kJ/kg/C); 2% fat (C 1.675 kJ/kg/C); 4.8% carbohydrate (C, 1.424 kJ/kg/C); 0.7% ash (C, 0.837 kJ/kg/C). * Information not necessary for problem solving P [CpMilk 3.89 kJ/kgC; Steam 1251.2 kg/h] (6) Milk is to undergo UHT (ultra high temperature) processing with a concurrent tubular heat exchanger used as the method of heating. UHT low fat (2%) fluid milk is to be produced at 5000 kg/h (with a desired time/temperature of 2 seconds at 150C*). Milk with an initial temperature of 15C is fed to the heat exchanger and steam at 543.1 kPa and 100% quality is used as the heating media. Condensate at 155C flows from the steam trap. What is the required flow rate of steam to the heat exchanger? The composition of 2% low fat milk is given as: 89.2% moisture (Cp 4.187 kJ/kg/C); 3.3% protein (C, 1.549 kJ/kg/C); 2% fat (C 1.675 kJ/kg/C); 4.8% carbohydrate (C, 1.424 kJ/kg/C); 0.7% ash (C, 0.837 kJ/kg/C). * Information not necessary for problem solving P [CpMilk 3.89 kJ/kgC; Steam 1251.2 kg/h]