Heat Transfer Through a Cylinder

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SUMMARY

The discussion focuses on calculating heat loss through a cylinder with a wall thickness of 3 mm and a thermal conductivity (k value) of 0.0042 W/mK. The internal temperature is 64 degrees Celsius, while the external temperature is 22 degrees Celsius. The heat transfer coefficient for the air outside the cylinder is 0.3 W/m²K. Participants emphasize the importance of constructing a thermal circuit to effectively map and solve the problem of adding resistances for the walls, ceiling, and air.

PREREQUISITES
  • Understanding of thermal conductivity and heat transfer principles
  • Familiarity with thermal resistance calculations
  • Knowledge of heat transfer coefficients
  • Ability to create thermal circuit diagrams
NEXT STEPS
  • Study the concept of thermal resistance in cylindrical geometries
  • Learn how to calculate heat loss using Fourier's law of heat conduction
  • Explore the application of thermal circuit analysis in heat transfer problems
  • Investigate the impact of varying heat transfer coefficients on thermal performance
USEFUL FOR

Mechanical engineers, thermal analysts, and students studying heat transfer principles will benefit from this discussion, particularly those involved in thermal management and insulation design.

CanoIsDbo
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The problem is about a cylinder with 3 mm thickness in the walls, roof, and ceiling. The walls, roof, and ceiling also have a k value of .0042 w/mk. Inside the cylinder is 64 degrees Celsius and outside its 22 degrees Celsius. The air outside the cylinder has a heat transfer coefficient of .3 W/m^2K. I have to calculate the heat loss for this cylinder. My question is, how do I add the resistances for the walls, ceiling/base, and air? Would it be delta T/(Rwall, Rceiling/base, Rair(wall), Rair(base/ceiling))?
 
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Can you post the actual problem statement?

I think if you draw a thermal circuit, it will give you a good map to solve the problem.
 

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