Determine the outlet temperature of oil in Problem 8.24 for the same initial temperatures of the fluids if the flow arrangement is one shell pass and two tube passes, but with the same total area and average overall heat transfer coefficient as the unit inProblem 8.24. From Problem 8.24: In a heat exchanger, 10,000 lb/h of water enter at 60?F and cool 20,000 lb/h of an oil having a specific heat of 0.50 Btu/(lb?F) from 200?F to 150?F. If the overall heat transfer coefficient is 50 Btu/(h ft2?F), determine the surface area required.GIVENWater cooling oil in a tube and shell heat exchangerWater flow rate (mw) = 10,000 lb/hOil flow rate (mo) = 20,000 lb/hOil specific heat (cpo) = 0.50 Btu/(lb ?F)Water inlet temperature: (Tw,in) = 60?FOil inlet temperature: To,in = 200?FOverall heat transfer coefficient (U) = 50 Btu/(h ft2 ?F)One shell and two tube passesSame surface area as Problem 8.24: A = 111ft2

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Nn D, (2.75x10 m)NS 1.8 NTU D. D, D, In- 2k,L D. (rmepm) (0.023 k (1.45 x 10' N**(P»**| w"pw -10.8 D, 0.25 = 300 kg/s (4182 J/(kg K)) T(0.0334 m)(2.75 x10*m)N8 0.03340 (300 kg/s)(4182 J(kg k) 0.8 0.0266 0.597 W/(mK) (1.45x10" 70.4 (0.023) 0.0266 m (o0334a (0.0034 341n 0.0026 2(43 W/(mK)) (11,350 W/(m°K)