An aluminium tube carrying a hot liquid at 118°C has 12 integrally machined longitudinal fins on its outer surface. The tube's inner and outer radii are 12 and 20 mm, and its total length is 281 mm, while the fins' height is 18 mm and their thickness is 2.2 mm. Air at 25°C flows over the fin surface, providing an approximately uniform convection heat transfer coefficient of 35 W/m2°C, and the heat transfer coefficient of the hot liquid inside the tube is 51 W/m2°C. The thermal conductivity of aluminium is 204 W/m °C. (a) State the assumptions and draw a clear sketch showing the geometry, boundary conditions and equivalent thermal circuit. Demonstrate how these assumptions could be used in solution of the problem. (b) Calculate the thermal resistance of the entire fin system. (c) Calculate the fin's heat transfer rate.

An aluminium tube carrying a hot liquid at 118°C has 12 integrally machined longitudinal fins on its outer surface. The tube's inner and outer radii are 12 and 20 mm, and its total length is 281 mm, while the fins' height is 18 mm and their thickness is 2.2 mm. Air at 25°C flows over the fin surface, providing an approximately uniform convection heat transfer coefficient of 35 W/m2°C, and the heat transfer coefficient of the hot liquid inside the tube is 51 W/m2°C. The thermal conductivity of aluminium is 204 W/m °C. (a) State the assumptions and draw a clear sketch showing the geometry, boundary conditions and equivalent thermal circuit. Demonstrate how these assumptions could be used in solution of the problem. (b) Calculate the thermal resistance of the entire fin system. (c) Calculate the fin's heat transfer rate.

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

See similar textbooks

Similar questions

None
What is energy conversion used for ؟
Problem- Cargo ships can cause a lot of air pollution.Solution- to use nuclear powered ships since they hold a lot of energy and can travel for long distances. How it will work is that it will need a nuclear reactor at the bottom of the boat to heat up the water and then turn it to electricity to power the boat. The boat will be made out of graphene which is a tough material to avoid any leaks in the boat. It will also contain many control rods because nuclear power is so powerful that it can create to much energy to handle. With control rods, you can slow down this process and keep it in a controlled manner. Since cargo ships are already is the ocean, there will be no need for any extra materials to make it work. -Do you think this will work? Why/Why not? -What do you think is wrong with it/ How can this be improved? Please send this to someone else I need to record 50 responses for a science project. Thank you!
20
Q3/ Choose the correct option:-
3. One precaution that needs to be foliowed in a work area displaying the sign shown above is be cut into 3.2-m-long pieces. How many 3,2-m-long pieces of pipe can be cut from the original A length of copper pipe measures 15.3 m. According to a job's specifications, the pipe needs to wear a leather apron. b. avoid using solvents. wear rubber gloves. d. prohibit welding. a. C. 4. 15.3-m-long copper pipe? a. two b. three C. four d. Five 5. What is strain? a. Determined by dividing the ioad by the smallest actual cross-sectional area e specimen b. The ratio between the original length and the change in length when an external forre applied C. The amount of stress that a material can absorb without exceeding its breaking stress d. A measurement of the deformation produced by the application of an external force ight of eve should be-
Diagram: Given the hook-up drawing, list all the equipment, tools and materials that are needed in installation. INST. PIPING 1- *1 INST. PIPING
12. The following is concerned with the depth of the hole: * Drilling operation Drilling operation and blind-hole Blind-hole Through-hole
Find lx and ly.. Urgent...please do in 15 minute's
Which statement is correct?
Paula has worked for Brindle Corporation for 3 years. During this time, she has worked as a machine operator/cell leader in various work cells. Recently, the plant went to mandatory 12-hour shifts and plans to remain on this schedule for several months. Paula’s present work cell is manufacturing 3-inch diameter exhaust tubes that are made from stainless steel. These tubes get a hole punched in them, a flange welded on, and burrs ground off. The pipe then gets placed into a gage to check that it was made correctly. (The tubes weigh about six pounds.) Paula has been performing the welding operation. She leans into the machine and loads the part into a fixture then positions the flange. Both pieces are clamped (using hand clamps) into position and the machine is cycled by depressing two palm buttons. The gaging operation requires placing the finished part into the gage and clamping it (using hand clamps) into place. A pin is depressed to verify the position of the hole and a…