An oil flow through a 40 mm bore steel pipe with the thickness of 4 mm. The pipe is covered by 10 mm thickness of insulator with the thermal conductivity of 0.038 W/m.K as shown in Diagram 4b. The temperature of the oil in the pipe is 75°C and the ambient temperature is 17°C. The internal thermal conductivity of steel is 50 W/m.K and the inside and outside heat transfer coefficient are 300 W/m².C and 17 W/m².C respectively. Neglecting radiation, calculate the following: i. Rate of heat flow per meter length of the pipe ii. The temperature of the outside surface (Ts). Ts Oil 75°C Ambient temperature 17°C 40

An oil flow through a 40 mm bore steel pipe with the thickness of 4 mm. The pipe is covered by 10 mm thickness of insulator with the thermal conductivity of 0.038 W/m.K as shown in Diagram 4b. The temperature of the oil in the pipe is 75°C and the ambient temperature is 17°C. The internal thermal conductivity of steel is 50 W/m.K and the inside and outside heat transfer coefficient are 300 W/m².C and 17 W/m².C respectively. Neglecting radiation, calculate the following: i. Rate of heat flow per meter length of the pipe ii. The temperature of the outside surface (Ts). Ts Oil 75°C Ambient temperature 17°C 40

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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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

An oil flow through a 40 mm bore steel pipe with the thickness of 4 mm. The pipe is covered
by 10 mm thickness of insulator with the thermal conductivity of 0.038 W/m.K as shown
in Diagram 4b. The temperature of the oil in the pipe is 75°C and the ambient temperature
is 17°C. The internal thermal conductivity of steel is 50 W/m.K and the inside and outside
heat transfer coefficient are 300 W/m².C and 17 W/m?.C respectively. Neglecting
radiation, calculate the following:
i. Rate of heat flow per meter length of the pipe
ii. The temperature of the outside surface (Ts).
Ts
Ambient
Oil 75°C
temperature 17°C
40
Note : All dimensions are in mm/Nota: Semua dimensi adalah dalam mm
Diagram 4b/Rajah 4b

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Step 1 Expression of Thermal resistance in heat transfer problems.

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