MECHANICAL LOADS

Maximal Figures

In TEC construction the most delicate parts - thermoelectric pellets made from Bi2Te3 semiconductors. The thermoelectric material has limited mechanical properties. So estimations of maximal mechanical loads to TECs are based on strength of thermoelectric material - TE pellets in a TEC.

RMT recommends the following maximal figures for mechanical loads:

 

Admissible static loads

to  TE material, max

Per mm˛ of cross-section

N/mm˛

Tension Force

5

Compression Force

5

Shear Force

2

  

While a thermoelectric material is quite strong in both tension and compression, it tends to be relatively weak in shear.

Estimations of Maximal Mechanical Loads

With use of the figures it is possible to calculate static mechanical loads to particular TEC types by calculation of total cross-section of all TE pellets of TECs.

Note. It does not mean a size of TEC cold of hot sizes, but only sum of pellet cross-sections.

Examples

Parameter

Units

Example1

Example2

TEC type

-

1MC06-070-10

1MC04-030-05

Cold side

mm

12.0x12.0

6,4x6,4

Hot side

mm

12.0x12.0

6,4x6,4

Number of pellets

-

140

60

Pellet cross-section

mm˛

0.6x0.6

0.4x0.4

Sum of pellets

mm˛

50.4

9.6

Total Forces

Tension

N

252

48

Compression

N

252

48

Shear

N

100

19

Note: If mechanical mounting is applied, maximal compression force must be divided by number of screw to estimate torsion per screw.