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re: best temp. for fridge & freezer??
31 jan 2001
~^johnny^~ wrote:
>...chest freezers are the only thing to have, if they are accessed once
>or more daily, due to the nature of cold air vs warm air; eg:
>stratification, buoyancy, convection, etc. every time you open
>the door, you practically exchange all the air.
this could be mcfl myth #37. say we open our 20 ft^3 upright 6 times a day,
and the 10 f air inside completely exchanges with 70 f room air each time,
which the freezer cools using 20/55(70-10) = 22 btu or 22/3.41/3 = 2.1 wh
with a cop of 3. that's 4.7 kwh/year worth 47 cents at 10 cents/kwh.
>if you are stuck with an upright freezer, keep it full!
>even empty gallon water jugs, un the unused spaces of an upright
>freezer, will minimize the losses due to air changes.
we might dispel this possible myth #38 by recognizing that condensation
from room air is proportional to the amount of cold surface exposed (more
with all the jugs), and condensation warms those surfaces, and a frost-free
fridge has to unfreeze and evaporate that condensed water.
nick
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