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

Eight Nominations for 2020 Wim…

Mechanical design based on the design principles defined by Wim van der Hoek is very much alive. The Philips engineer and part-time professorat Eindhoven University of Technology passed away early...

Read more
Winner of the Rien Koster…

The Rien Koster Award is given to a mechatronics engineer/designer who has made a significant contribution to the field of mechatronics and precision engineering. The award was handed out for...

Read more
Vice-Chairman Jaap Verkerk deceased

We received the sad news that our former vice-Chairman Jaap Verkerk is deceased. For 11 years (1988-1999) Jaap de NVPT led with passion (NVPT later called DSPE). We wish his...

Read more