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1)Why we want to choose 1-2 heat exchange2) Benefits of using many tubes in the...

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Mechanical Engineering


1)Why we want to choose 1-2 heat exchange
2) Benefits of using many tubes in the heat exchange
3) material use for tube
4)shell tube
5) why we use 1 inch two pass
6) the length of tube we use is 6ft
7)U tube - Coose BEU and AEU
8)tube sheet
9) buffle

Answer & Explanation Solved by verified expert
4.0 Ratings (757 Votes)

1.we are choosing 2 pass he over 1pass heat exchanger because in 2 pass he we are paaing same quantity of fluid through more surface areae(ie 2 passes)

2.1st benefit of using many tubess is heat transfer Q =hA(T2-T1) proportional to A ,therefore heat transfer

increases.Another benefit is that ,since we are using many tubes for a certain quantity .flow area is decreased,means velocity increased,(Q=AV is const).the heat transfer coefficient varies with respect to velocity(approximately h proportional to 0.8 th power of v.so if velocity doubles,h will become 1.74 times initial value,so Q=hA(t2-t1) increases

3,materials used commonly are carbonsteel,stainless steel,brass.bronze,titanium alloys
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