Results 1 to 9 of 9

Thread: Peltier Coolers

  1. #1
    Join Date
    Mar 2005
    Location
    Lanzarote
    Age
    41
    Posts
    372
    Rep Power
    20

    Peltier Coolers



    Has anyone ever had much dealings with TECīs (peltiers)?

    I need a small amount of cooling so they seem the obvious choice, but Iīm getting conflicting views on controlling them. From what Iīve seen thermostat control is bad for them, PWM is bad for them. So what are you supposed to do?

    I have looked at a wine chiller and that I think uses PWM and computer overclockers I assume just use on/off controls.

    I donīt want to spend a lot on controller, Iīd just make something to incorporate into my project. Any help would be greatly appreciated.



  2. #2
    Join Date
    Sep 2003
    Location
    ISRAEL
    Age
    72
    Posts
    4,266
    Rep Power
    46

    Re: Peltier Coolers

    Ask the manufacturers, try gooooooooooooooogle

  3. #3
    Brian_UK's Avatar
    Brian_UK is offline Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
    Join Date
    Mar 2001
    Location
    Dorset
    Age
    76
    Posts
    11,192
    Rep Power
    60

    Re: Peltier Coolers

    I was going to direct you to a previous thread which discussed some of these problems.

    Changed my mind when I realised that you were one of the major contributors. DOH!

    Remember the lady with the vivarium?
    Brian - Newton Abbot, Devon, UK
    Retired March 2015

  4. #4
    Join Date
    Aug 2009
    Location
    New Zealand
    Age
    59
    Posts
    2,556
    Rep Power
    26

    Re: Peltier Coolers

    It comes down to what level of temperature control you require.
    remember that these are DC, so changing the voltage input changes the refrigeration effect. TEC are good thermal conductors when they are off, so it is better to leave a trickle charge going through.

  5. #5
    Join Date
    Mar 2005
    Location
    Lanzarote
    Age
    41
    Posts
    372
    Rep Power
    20

    Re: Peltier Coolers

    Quote Originally Posted by Brian_UK View Post
    I was going to direct you to a previous thread which discussed some of these problems.

    Changed my mind when I realised that you were one of the major contributors. DOH!

    Remember the lady with the vivarium?
    Yeah, I remember. In fact I am doing almost exactly the same thing as what is in that thread.

    The modules themselves, I have no problem with, I understand the heat sinks and all that. Itīs just the controls and power supplies. Temperature wise itīs not going to be cold at all really, I only need a temperature 27šC and it doesnīt need to be that accurate, within a degree of that will suffice.

    If for example, I had 2 supplies (say, 12v and 1,5v) and supplied the TEC with 12v when thermostat on and 1,5v when thermostat off, would that be sufficient to maintain a steady-ish temperature while not damaging the TEC or does the transition need to be smooth?

  6. #6
    Join Date
    Mar 2009
    Location
    KZN, South Africa
    Age
    63
    Posts
    2,212
    Rep Power
    20

    Re: Peltier Coolers

    http://www.seattlerobotics.org/encod.../variable.html

    Would this kind of variable voltage power supply be useful?
    Engineering Specialist - Cuprobraze, Nocolok, CD Technology
    Rarefied Technologies ( SE Asia )

  7. #7
    Join Date
    Mar 2005
    Location
    Lanzarote
    Age
    41
    Posts
    372
    Rep Power
    20

    Re: Peltier Coolers

    Possibly if it was made a bit more powerful and robust. Iīve not done the sums yet, but I think that I am going to need about 50watts of cooling, plus fans, etc so I would need a power supply capable something higher than that. Probably 100w power supply would be sufficient. Itīs more the method of how to feed the TEC really.

  8. #8
    Brian_UK's Avatar
    Brian_UK is offline Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
    Join Date
    Mar 2001
    Location
    Dorset
    Age
    76
    Posts
    11,192
    Rep Power
    60

    Re: Peltier Coolers

    Whichever is used the fans can be fed from a "simple" power supply, maybe cheaper????
    Brian - Newton Abbot, Devon, UK
    Retired March 2015

  9. #9
    Join Date
    Oct 2010
    Location
    USA
    Age
    41
    Posts
    15
    Rep Power
    0

    Re: Peltier Coolers

    yes you can search the answer for your problem at different search engine.

Similar Threads

  1. Walk in cooler & walk in coolers
    By henrymark in forum Commercial
    Replies: 3
    Last Post: 18-08-2010, 02:43 AM
  2. Husky bottle coolers
    By dunny123 in forum Commercial
    Replies: 11
    Last Post: 24-08-2009, 11:10 PM
  3. Peltier wine cooler
    By shanes696 in forum New Technologies
    Replies: 5
    Last Post: 14-12-2005, 10:40 PM
  4. thermoelectric air coolers?? Is it suitable??
    By johnnysoprano in forum Fundamentals
    Replies: 3
    Last Post: 06-08-2005, 10:48 PM
  5. (Remote) Back bar coolers
    By Chris2005 in forum Commercial
    Replies: 3
    Last Post: 20-03-2005, 09:31 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •