A double pipe (shell and tube) heat exchanger is constructed of a stai – McqOptions

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1.	A double pipe (shell and tube) heat exchanger is constructed of a stainless steel inner tube of inner diameter is 1.5 cm (Di) and outer diameter is (1.9 cm) The thermal resistance of the heat exchanger/unit length as 0.0532°C/W. determine the overall heat transfer co-efficient for the inner and outer surface area of the tube respectively.
A.	350 and 450 W/m2°C
B.	399 and 315 W/m2°C
C.	299 and 215 W/m2°C
D.	350 and 315 W/m2°C
Answer» C. 299 and 215 W/m2°C

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A double pipe (shell and tube) heat exchanger is constructed of a stainless steel inner tube of inner diameter is 1.5 cm (Di) and outer diameter is (1.9 cm) The thermal resistance of the heat exchanger/unit length as 0.0532°C/W. determine the overall heat transfer co-efficient for the inner and outer surface area of the tube respectively.