a) Water (Cp=4180 J/kg.∘C) is used to cool ethylene glycol (Cp=2670 J/kg.∘C) from 70∘C to 40∘C in a counter-flow doubl
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a) Water (Cp=4180 J/kg.∘C) is used to cool ethylene glycol (Cp=2670 J/kg.∘C) from 70∘C to 40∘C in a counter-flow doubl
a) Water (Cp=4180 J/kg.∘C) is used to cool ethylene glycol (Cp=2670 J/kg.∘C) from 70∘C to 40∘C in a counter-flow double pipe heat exchanger at a mass flow rate of 0.5 kg/s. The initial temperature of water is 25∘C. Ethylene glycol flows at a total rate of 0.3 kg/s. If the overall heat transfer coefficient is 250 W/m2, calculate: i. The rate of heat transfer (2 marks) ii. The exit temperature of water (2 marks) iii. Log Mean Temperature Δ TLM (4 marks) iv. Surface heating area, As (2 marks)
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