Transient temperature calculator


In this calculator you can calculate the steady state temperatures of a network. As well as the temperatures as function of time. Follow the steps, and if you are ready press the button calculate and evaluate the results in the graph.

In a lumped capacity model, a thermal system is divided in to

  • Heat Capacities
  • Thermal Couplings

The heat capacities are called Nodes, and it is assumed that the temperature in one node is uniform. Heat capacities can be:

  • Large parts
  • Thermally conductive parts
  • Multiple parts with good thermal conducion between them
  • Parts with "important" temperatures

In the image above, a three node system is shown. Part 1 is in contact with body 2 by a few connection points. Body 2 is in contact with body 3, which is a large and surrounds the other parts.
In the picture to the right, the conductive couplings and radiation couplings identified. Body 1 has a heat source.

Use the calculation tool to calculate the temperatures as function of time.

Step 1 Input system size

#nodes How many nodes does the system contain?(2-6)
if you change this, all data will be lost.




Step 2 Input thermal couplings

from to type value[W/K]


Step 3 Constant temperatures nodes (e.g. heatsinks)

node temperature [K]





Step 4 Input Heat loads

node Power [W]






Step 5 Calculate steady state

Press calculate to evaluate the results

-

-

(drag blocks to rearrange locations)

Step 6 Input heatcapacities of the nodes ( C=L*B*H*rho*Cp)

node Capacity [J/K]










Step 7 Input Initial Temperatures (specify for all)

node Temperature [K]





Step 8 Set simulation time in sec



Step 9 Calculate Transient Temperature

 

















This calculator was made for educational purposes only. No rights can be obtained from the results you calculate. If you have comments please contact info@dspe.nl.



References

Techcafé December 8

In Dutch: Uitnodiging eindejaarsspecial van het Techcafé. Is Additive Manufacturing alleen geschikt voor prototypes of moeten we kansen voor de productieomgeving niet onderschatten?

Read more
YPN visited Nikhef in the…

On November 24, YPN visited Nikhef and it was a great success. Nikhef is an institute that researches and develops scientific instrumentation, mainly for particle accelerators in Switzerland.

Read more
Wim van der Hoek Award…

Prize for better measurement of gravitational waves. During the 21st edition of the Precision Fair, held this year in Den Bosch for the second time, the Wim van der Hoek Award was presented under the auspices of DSPE (Dutch Society…

Read more