In a heat exchanger, water (Cp = 4200 j/kg.K ) is heated from 15 0 C to 350 C by a hot oil which has specific heat capacity of 2150 J/kg. K. Mass flow rate of the oil is 0.25kg/s & it’s temperature difference was 250 C after transferring the heat (T1= 750 C & T2 = 500 C). Mass flow rate of the water is 0.1kg/s. Calculate the efficiency of the heat exchangerIf the efficiency of heat exchanger becomes 89%, what will be the final temperature of water?Explain how the changes in thermal efficiency of the heat exchanger can affect it’s behavioural characteristics.

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Answered: In a heat exchanger, water (Cp = 4200…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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In a heat exchanger, water (Cp = 4200 j/kg.K ) is heated from 15 ⁰C to 35⁰C by a hot oil which has specific heat capacity of 2150 J/kg. K. Mass flow rate of the oil is 0.25kg/s & it’s temperature difference was 25⁰C after transferring the heat (T₁= 75⁰C & T₂ = 50⁰C). Mass flow rate of the water is 0.1kg/s.

Calculate the efficiency of the heat exchanger
If the efficiency of heat exchanger becomes 89%, what will be the final temperature of water?
Explain how the changes in thermal efficiency of the heat exchanger can affect it’s behavioural characteristics.

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