2. In the counter flow heat exchanger, the water at 20°C is used to cool the liquid from 80°C to 30°C, and the volumetric flow rate of the liquid is 5.3m³/h, the specific heat of the liquid is 1.9kJ/ (kg. C), its density is 850kg/m³. The pipe diameter of the exchanger is $25×2.5mm., and the water flows in the tube-side. The individual heat transfer coefficients of the water-side and the liquid-side are 0.85kW/ (m². C) and 1.70kW/(m². C), respectively. The thermal conductivity km of the pipe is 45W/(m. C). Neglecting the scale resistance of pipe wall. If the outlet temperature of the water cannot be over 50°C, calculate the heat transfer surface area of the exchanger.<

2. In the counter flow heat exchanger, the water at 20°C is used to cool the liquid from 80°C to 30°C, and the volumetric flow rate of the liquid is 5.3m³/h, the specific heat of the liquid is 1.9kJ/ (kg. C), its density is 850kg/m³. The pipe diameter of the exchanger is $25×2.5mm., and the water flows in the tube-side. The individual heat transfer coefficients of the water-side and the liquid-side are 0.85kW/ (m². C) and 1.70kW/(m². C), respectively. The thermal conductivity km of the pipe is 45W/(m. C). Neglecting the scale resistance of pipe wall. If the outlet temperature of the water cannot be over 50°C, calculate the heat transfer surface area of the exchanger.<

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.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.1P: 10.1 In a heat exchanger, as shown in the accompanying figure, air flows over brass tubes of 1.8-cm...

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