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TEC cooler opinion?

Discussion in 'Electronic Design' started by bart, Apr 24, 2007.

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  1. bart

    bart Guest

    Hi all,
    Here's my latest project;
    I'm making a wine cooler for the garage.
    We live on the west coast of Canada,
    the garage temp varies between -15C in the winter to almost 40C in the
    summer - with a hot car parked in it.
    It needs to cool in the summer, heat in the winter & hopefully
    maintain a ~18C temp.
    The inside dimensions will be ~8 cubic feet (2" foam insulation).
    I'm cooling/heating it with a Peltier H-bridge circuit
    (TI - UC3638 chip - SLUA202A app note & yes I will change the CS
    resistors & yada-yada for a higher current draw).

    I was thinking of using 2 - 80 watt Peltier junctions, connected in
    parallel, mounted on rectangular heat sinks (fans on both sides).
    Any advantage/disadvantage of using 2 - 80W units as opposed to one
    170 Watt unit?

    Am I missing anything?

    PS: downloaded the Melcor Aztec Peltier calculator & one 80W junction
    should be overkill, but redundancy is always nice.

    Thanks in advance!
  2. The whole project is overkill. The usual approach
    would be a hole in the ground. Dig some 6 feet
    and burry a box there. No electricity needed.

  3. bart

    bart Guest

    A basement would actually be ideal but
    unfortunately we live in a high groundwater area
    and digging a hole would soon result in a pool.
    Thanks for the swell advice anyway.
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