Q21:- A heat exchanger is used to cool a hot hydrocarbon liquid flowing at rate of 200 Kg/hr from 150°C to 65°C by cooling water which enters at 25°C and out at 45C. Caleulate the flow rate of cooling water. Given that Cpa of hydrocarbon liquid = 0.6 Kcal/Kg.ºC Cpn of water = 1Kcal/Kg."C IHot hydrecarbon 200 Ka hi T-15c Wster (lD) T45C

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