A double-pipe parallel-flow heat exchanger consists of 36 stainless steel tubes. Each tube is 5 m long and the inner and outer diameters of tube are D 1 cm and D, = 1.4 cm. Water (C, = 4179 J/kg. C, k = 0.604 W/m. °C, p = 997.4 kg/m3, µ = 9.8 x 10- m?/s, Pr = 6.78) (k = 14.2 W/m. °C). The water is heated by ethylene glycol (C, = 2606 J/kg.°C, v = 3.865 x 10-6 m²/s, k = 0.261 W/m. °C, p = 1082.61 kg/m³) at 70 °C with 0.3 kg/s mass flow rate Assume a fouling factor RA = 0.0005 m². °c/W on the %3D at 20 °C and 1.5 kg/s flows through tube %3D %3! inner surface of the tube. Determine a) rate of heat transfer b) outlet temperature of water and glycol.

A double-pipe parallel-flow heat exchanger consists of 36 stainless steel tubes. Each tube is 5 m long and the inner and outer diameters of tube are D 1 cm and D, = 1.4 cm. Water (C, = 4179 J/kg. C, k = 0.604 W/m. °C, p = 997.4 kg/m3, µ = 9.8 x 10- m?/s, Pr = 6.78) (k = 14.2 W/m. °C). The water is heated by ethylene glycol (C, = 2606 J/kg.°C, v = 3.865 x 10-6 m²/s, k = 0.261 W/m. °C, p = 1082.61 kg/m³) at 70 °C with 0.3 kg/s mass flow rate Assume a fouling factor RA = 0.0005 m². °c/W on the %3D at 20 °C and 1.5 kg/s flows through tube %3D %3! inner surface of the tube. Determine a) rate of heat transfer b) outlet temperature of water and glycol.

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 10.46P

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