Heat Transfer 3

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The flashcards below were created by user RJVan on FreezingBlue Flashcards.


  1. What are the units for thermal conductivity (k)?
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  2. What are the units for film coefficient (h)?
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  3. What are the units for heat transfer coefficient (U)?
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  4. What are the units for thermal resistance (Rth)?
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  5. What is the equation for heat transfer through a flat plate?
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  6. What is the equation for total heat transfer coefficient?
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  7. What limitations are there on Newton's Method for solving transient heat conduction?

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    • You need a starter value of Tt so you can calculate a starting value of r or t
    • chart?chf=bg,s,00000000&cht=tx&chl=rt%3D-ln%5Cfrac%7BT_t-T_%5Cinfty%7D%7BT_0-T_%5Cinfty&chs=254x76
  8. What do you need to know to use the Lumped Parameter method for solving transient heat conduction?
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    • The Biot number must be less than 0.10.
    • To calculate the Biot and Fourier numbers, the characteristic length (Lc) of a cylindrical object is half its radius.
  9. What is the Stefan- Boltzmann constant, and how is it used to calculate emissive power?
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  10. What do you need to know to use the Lumped Parameter electrical analogy for solving transient heat conduction?
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    The time constant 

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    is the time it takes for the temperature to be reduced to 36.8% of its original value.
  11. What is the equation to compute gray body radiation?
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    • where 
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Card Set Information

Author:
RJVan
ID:
308267
Filename:
Heat Transfer 3
Updated:
2016-03-17 21:35:22
Tags:
heat exchanger conduction convection radiation
Folders:
Mechanical Engineering
Description:
Mechanical Professional Engineering Exam Review
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