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Steam in a heating system flows through tubes whose outer diameter is 3 cm and whose walls are maintained at a temperature of 120°C. Circular aluminium fins [k = 180 W/(m.K)] of outer diameter 6 cm and constant thickness t = 2 mm are attached to the tube, as shown in Fig. The space between the fins is 3 mm, and thus there are 200 fins per metre length of the tube. Heat is transferred to the surrounding air at T = 25°C, with a combined heat transfer coefficient of h = 60W/(m².K). Determine the increase in heat transfer rate from the tube per metre of its length as a result of adding fins. Also calculate fin effectiveness. Fin cc co T₁ = 25°C h = 60 W/m².K [t= 2 mm H S = 3 mm

Steam in a heating system flows through tubes whose outer diameter is 3 cm and whose walls are maintained at a temperature of 120°C. Circular aluminium fins [k = 180 W/(m.K)] of outer diameter 6 cm and constant thickness t = 2 mm are attached to the tube, as shown in Fig. The space between the fins is 3 mm, and thus there are 200 fins per metre length of the tube. Heat is transferred to the surrounding air at T = 25°C, with a combined heat transfer coefficient of h = 60W/(m².K). Determine the increase in heat transfer rate from the tube per metre of its length as a result of adding fins. Also calculate fin effectiveness. Fin cc co T₁ = 25°C h = 60 W/m².K [t= 2 mm H S = 3 mm

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Steam in a heating system flows through tubes whose outer diameter is 3 cm and whose walls are maintained at a temperature of 120°C. Circular aluminium fins [k = 180 W/(m.K)] of outer diameter 6 cm and constant thickness t = 2 mm are attached to the tube, as shown in Fig. The space between the fins is 3 mm, and thus there are 200 fins per metre length of the tube. Heat is transferred to the surrounding air at T = 25°C, with a combined heat transfer coefficient of h = 60W/(m².K). Determine the increase in heat transfer rate from the tube per metre of its length as a result of adding fins. Also calculate fin effectiveness. occ Fin T₁ = 25°C h = 60 W/m².K t = 2 mm S = 3 mm
Transcribed Image Text:Steam in a heating system flows through tubes whose outer diameter is 3 cm and whose walls are maintained at a temperature of 120°C. Circular aluminium fins [k = 180 W/(m.K)] of outer diameter 6 cm and constant thickness t = 2 mm are attached to the tube, as shown in Fig. The space between the fins is 3 mm, and thus there are 200 fins per metre length of the tube. Heat is transferred to the surrounding air at T = 25°C, with a combined heat transfer coefficient of h = 60W/(m².K). Determine the increase in heat transfer rate from the tube per metre of its length as a result of adding fins. Also calculate fin effectiveness. occ Fin T₁ = 25°C h = 60 W/m².K t = 2 mm S = 3 mm
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