Water is heated with machine oil in a pipe-passing counter-flow heat exchanger. Heat transfer coefficient 90w/(m.K),...
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Water is heated with machine oil in a pipe-passing counter-flow heat exchanger. Heat transfer coefficient 90w/(m.K), the inlet temperature of the water passing in the pipe, which has an internal diameter of 20mm and an outer diameter of 30mm, is 10°C, the output temperature is 50°C and the mass flow rate is 3kg/s. The inlet temperature of the machine oil passing in the body is 150°C, the mass flow rate is 2.8kg/s Specific heat capacity 2.7 kJ / (kg.K), density 750kg/m dynamic viscosity 88x103 kg/(m.s), Heat transfer coefficient 1.7W/(m.K),and the Prandtl number is 35. On the tube side of the body cross section is 40?cm According to it; 1- Determine the total heat transfer coefficient by the inner surface area of the pipe, 2- Determine the heat exchanger area? K; = ? Hot oil mh = 2.8 kg/s U; = ? A. = ? Water 10°C mc =3 kg/s 50°C D; = 20 mm = 0.02 m D, = 30 mm = 0.03 m Water is heated with machine oil in a pipe-passing counter-flow heat exchanger. Heat transfer coefficient 90w/(m.K), the inlet temperature of the water passing in the pipe, which has an internal diameter of 20mm and an outer diameter of 30mm, is 10°C, the output temperature is 50°C and the mass flow rate is 3kg/s. The inlet temperature of the machine oil passing in the body is 150°C, the mass flow rate is 2.8kg/s Specific heat capacity 2.7 kJ / (kg.K), density 750kg/m dynamic viscosity 88x103 kg/(m.s), Heat transfer coefficient 1.7W/(m.K),and the Prandtl number is 35. On the tube side of the body cross section is 40?cm According to it; 1- Determine the total heat transfer coefficient by the inner surface area of the pipe, 2- Determine the heat exchanger area? K; = ? Hot oil mh = 2.8 kg/s U; = ? A. = ? Water 10°C mc =3 kg/s 50°C D; = 20 mm = 0.02 m D, = 30 mm = 0.03 m
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Related Book For
Principles of heat transfer
ISBN: 978-0495667704
7th Edition
Authors: Frank Kreith, Raj M. Manglik, Mark S. Bohn
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