"Piggy-backing" Peltier Modules..
"Piggy-backing" Peltier Modules..
(OP)
Has anyone had any success with mounting two Peltier modules together in order to achieve higher temperatures on the hot side and lower temperatures on the cold?
I'm currently designing a combined heating and cooling system which will ultimately be used for a batch pasteurisation process. The Peltiers I'm using have a temperature difference of 70°C meaning if I opperate from an ambient temperature of 20°C I should achieve around 55°C on the hot side and around -15°C on the cool side (roughly). However I need at least 70°C on the hot side! In order to achieve the higher temperature I bonded two of the modules together in the hope that the hot side of the first would increase the temperature of the cool side of the second meaning that the temperature difference sets from a higher higher point.
The result was that the hot side of the second Peltier module did increase. However, the cold side of the first module also increase (where I thought it would decrease). Could anyone with a better understanding of Peltier modules (not hard I know) shed any light on the matter?
Thanks,
Joe.
I'm currently designing a combined heating and cooling system which will ultimately be used for a batch pasteurisation process. The Peltiers I'm using have a temperature difference of 70°C meaning if I opperate from an ambient temperature of 20°C I should achieve around 55°C on the hot side and around -15°C on the cool side (roughly). However I need at least 70°C on the hot side! In order to achieve the higher temperature I bonded two of the modules together in the hope that the hot side of the first would increase the temperature of the cool side of the second meaning that the temperature difference sets from a higher higher point.
The result was that the hot side of the second Peltier module did increase. However, the cold side of the first module also increase (where I thought it would decrease). Could anyone with a better understanding of Peltier modules (not hard I know) shed any light on the matter?
Thanks,
Joe.





RE: "Piggy-backing" Peltier Modules..
What happened in the middle junction?
RE: "Piggy-backing" Peltier Modules..
See this website for a good overview of how Peltier modules work: http://www.tellurex.com/technology/peltier-faq.php
RE: "Piggy-backing" Peltier Modules..
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RE: "Piggy-backing" Peltier Modules..
This just leaves the heating.. I need 550W of heating power constantly over 15 minutes with out going over 65°C / 66°C. I've been looking at heating cable which is used for preventing ice forming on pipes and also under-floor heating cable which would both seem to do (although I'll need a lot of it in order to get the 550W).
Does anyone have any thoughts / concerns with using this type of heating wire for this application? Are there any alternatives?
Cheers,
Joe.
RE: "Piggy-backing" Peltier Modules..
http://www.minco.com/~/media/WWW/Resource%20Librar...
TTFN

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