A critical evaluation of today´s thermoelectric modules

Today´s thermoelectric module (TEM) users are experiencing a growing world marketplace filled with new or undiscovered sources for components. Selecting the right thermoelectric module supplier for a particular application is not as easy as it once was. New applications in thermoelectrics are occurring faster now than ever before as more people learn the benefits of using the technology. As these applications become more diversified and the variety of the customer´s needs expands, other criteria should be considered before selecting a TEM supplier based solely on price, performance and delivery. This paper examines TEMs produced by manufacturers from all over the world. A module performance survey illustrates the range of products available today. Some of the TEM´s were selected from this survey to undergo a variety of quality and reliability tests. These tests include electro-thermo cycling, high temperature ramp and soak, and thermal pulse. In addition, dimensional and visual inspections were performed and the results are included as a part of the overall “vendor qualification” process described in this paper