Consider a water-to-water counter-flow heat exchanger with these specifications. Hot water enters at 95oC while cold water enters at 20oC. The exit temperature of hot water is 15oC greater than that of cold water, and the mass flow rate of hot water is 50 percent greater than that of cold water. The product of heat transfer surface area and the overall heat transfer coefficient is 1400 W/m2 · oC. Taking the specific heat of both cold and hot water to be Cp=4180 J/kg · oC, determine (a) the outlet temperature of the cold water (b) the effectiveness of the heat exchanger (c) the mass flow rate of the cold water, and (d) the heat transfer rate.

Consider a water-to-water counter-flow heat exchanger with these specifications. Hot water enters at 95oC while cold water enters at 20oC. The exit temperature of hot water is 15oC greater than that of cold water, and the mass flow rate of hot water is 50 percent greater than that of cold water. The product of heat transfer surface area and the overall heat transfer coefficient is 1400 W/m2 · oC. Taking the specific heat of both cold and hot water to be Cp=4180 J/kg · oC, determine (a) the outlet temperature of the cold water (b) the effectiveness of the heat exchanger (c) the mass flow rate of the cold water, and (d) the heat transfer rate.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.46P

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