FAQ
Here are some of the most common questions that we get asked. If you are still unsure, contact us and we will be able to help.
Product questions
Thermoelectric Modules
How can you tell which is the hot and cold side of a module?
Visit our technical reference page, How to fit a thermoelectric module guide for information
How do I mount a thermoelectric module into a system?
Visit our technical reference page forinformation about how to do this.
What is the difference between a Peltier cooler and a generator module?
Both types of module use the thermoelectric effect. This effect is reversible so that both module types can act as a cooler or a generator; if a voltage is applied to a module, it will pump heat, but if a temperature difference is applied across a module a voltage will be produced. For more information see this article.
I have two sources of heat, one hot gas with a temperature of 180' c and cool water of 38'c temperature, can I harvest electricity from this?
It is possible to generate a relatively small amount of electricity from a temperature gradient using thermoelectric generator (TEG) modules. See our TEG module product page.
You will see a wide range of modules with various physical dimensions and electrical performance characteristics. Select any module and you will see the option to click on “ Data Sheet “ at the bottom of the page. Open up the data sheet and you will see on page 1 a summary of the dimensions and electrical performance for that specific module. On pages 2 and 3 you will see data graphs detailing the thermal input versus electrical output parameters.
To interpret the theoretical electrical output in your scenario read across on the x-axis (Th = temp hotside) at 180oC then read across to the y-axis close to the Tc = 30oC line (temp cold side). You will see how each parameter changes for each different module.
Please note that TEG modules work on a modular basis, so by increasing the number of modules in an application, performance will also be increased.
Thermal Management
What is the difference between heat spreading and heat removal?
Heat spreading is normally used to prevent hot spots and increase the surface area available for transfer, this is an important thermal management technique in hand held devices, e.g. mobile phones or tablets. Heat removal involves the transfer of heat energy from a source e.g. a micro-processor into a transfer medium, typically a fluid.
How much do you charge for thermal analysis?
Our services are priced on a case by case basis, please contact us with your requirements we will get back to you with a quote.
How to buy
I can't see how to buy your products, how do I purchase?
Most of the products listed on our website can be purchased through RS Components or Farnell Element 14. For products that are not available through RS or Farnell (there is no button to click), contact us directly with your requirements. These products are sold at wholesale and usually require a minimum order of 50 or 100 pieces. Additionally, if you wish to place a large order of a product that is available through one of our distributors, please contact us directing and we will be happy to assist you.
The exact specification that I'm looking for is not available, can you help?
Please contact us with your requirements, we may be able to source a standard product for you. If there is no standard product available, we can provide a bespoke solution to fit your needs.
I have a complex technical problem and need to speak to someone. How do I reach the right person?
Our contact form has pre-determined questions included which will help us to answer your query. Fill out this query form and we will direct your enquiry to the correct person, who will be in touch. If you are working to a tight deadline, please let us know on the form or call us for an urgent reply on our office number +44 (0)116 279 6899. If you can also fill out the form this will help us to respond more quickly.
Shipping and delivery
Do you ship to my country?
We ship products worldwide subject to minimum order quantities and delivery charge.
Research and development projects
I want to get involved in an R&D project. Who do I need to speak to?
Please e-mail: info@etdyn.com. All research requests will be passed onto our Technical Director who will assess the viability of research projects.
