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Thread: Engel MT35/45/60 question

  1. #11
    Join Date
    Apr 2008
    Location
    Brisbane,some of the time.
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    Yes,you will find that the Engle is designed to hold conditions at a certain ambient,without a check on google,guessing it maybe around 35 degrees.

    From my experience,once ambient temperatures get above 35 degrees,they struggle to hold -20 degrees C,even running continuously.

    When travelling,we organise things so the Engle is only used as a refrigerator,not a freezer.

    This not only works the cabinet easier,but also reduces battery drain.
    Paul

    D2,D2,D2a,D4,'09 Defender 110(sons), all moved on.

    '56 S1,been in the family since...'56
    Comes out of hibernation every few months for a run

  2. #12
    Join Date
    Jan 1970
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    NSW far north coast
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    Paul, have you ever bothered putting a fan on the condenser?

    Coffee time atm, trying to wake up.
    4:45am finish this morning......

  3. #13
    Join Date
    Sep 2018
    Location
    wa
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    Thermal analysis of the Engel MT35F evaporator. The video is 20x speed. Total elapsed time after turning on unit: 20:00 minutes. Temperature readings are probably off - the specs are somewhere around +/- 5F and the emissivity is very difficult to control.

    Screen Shot 2019-08-14 at 9.02.20 AM.jpg
    Engel MT35F Thermal Analysis (20x speed) from umb iilicam on Vimeo

    Within 10 seconds of being turned on, the condenser (at the rear of the unit) goes to an almost totally uniform 41.6 C in 23.9 C ambient conditions, meaning roughly 17.7 C temperature differential. This seems to be pretty consistent with my experience at 32.2 C, with the condenser hitting 50 C.

    The compressor itself stays fairly cool - slightly higher than ambient, but much cooler than the condenser for the most part.

    You can put fans anywhere on the condenser as the temperature is almost uniform from top to bottom.

  4. #14
    Join Date
    Sep 2018
    Location
    wa
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    So I've been operating my MT35 for a while now with two 24V condenser fans (instead of the single 24V fan that comes stock.) and I have to say that while it may have some small benefit for the compressor, it doesn't seem to move the needle in a noticeable way for internal temperatures. (Maybe someone out there can do a test with a much larger fan or some crazy blower and see if that helps.)

    What does help noticeably with lower temps to a huge degree is insulation, insulation, insulation. If I wrap my engel 'round with a cheap blanket (careful not to cover the vents!), I reckon I get an easy 3-4 degrees centigrade lower temps in the fridge.

    I bet if someone had some really nice, thick, high efficiency insulation that they could sew up around their fridge, it could help with high outside temps.

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