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3-201 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 aluminum alloy 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. P3-201. The space between the fins is 3 mm, and thus there are 200 fins per meter length of the tube. Heat is transferred to the surrounding air at 25°C, with a combined heat transfer coefficient of 60 W/m2-K. Determine the increase in heat transfer from the tube per meter of its length as a result of adding fins. page 245 FIGURE P3-201 r= 1.5 cm 2-3 cm t=2 mm S 3 mm

3-201 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 aluminum alloy 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. P3-201. The space between the fins is 3 mm, and thus there are 200 fins per meter length of the tube. Heat is transferred to the surrounding air at 25°C, with a combined heat transfer coefficient of 60 W/m2-K. Determine the increase in heat transfer from the tube per meter of its length as a result of adding fins. page 245 FIGURE P3-201 r= 1.5 cm 2-3 cm t=2 mm S 3 mm

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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3-201 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 aluminum alloy 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. P3-201. The space between the fins is 3 mm, and thus there are 200 fins per meter length of the tube. Heat is transferred to the surrounding air at 25°C, with a combined heat transfer coefficient of 60 W/m2-K. Determine the increase in heat transfer from the tube per meter of its length as a result of adding fins. page 245 FIGURE P3-201 r= 1.5 cm 2-3 cm t=2 mm S 3 mm
Transcribed Image Text:3-201 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 aluminum alloy 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. P3-201. The space between the fins is 3 mm, and thus there are 200 fins per meter length of the tube. Heat is transferred to the surrounding air at 25°C, with a combined heat transfer coefficient of 60 W/m2-K. Determine the increase in heat transfer from the tube per meter of its length as a result of adding fins. page 245 FIGURE P3-201 r= 1.5 cm 2-3 cm t=2 mm S 3 mm
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