In a parallel-flow heat exchanger, air (c,=1 kJ/kgk) is heated from 15 °C to 85 °C by water (c,=4 kJ/kgK). Water enters heat exchanger at 180 °C. Mass flow rate of water and air 0.6 kg/s and 3 kg/s, respectively. Heat transfer coefficient on air and water side is 300 and 1000 W/m²K., respectively. If the heat exchanger is made of 0.1-m diameter and 4-m long thin copper tubes, how many tubes are needed?

In a parallel-flow heat exchanger, air (c,=1 kJ/kgk) is heated from 15 °C to 85 °C by water (c,=4 kJ/kgK). Water enters heat exchanger at 180 °C. Mass flow rate of water and air 0.6 kg/s and 3 kg/s, respectively. Heat transfer coefficient on air and water side is 300 and 1000 W/m²K., respectively. If the heat exchanger is made of 0.1-m diameter and 4-m long thin copper tubes, how many tubes are needed?

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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