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Old 07-22-2015, 06:36 PM   #5 (permalink)
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ice/water storage volume vs heat transfer

The larger the cooler size the greater the cooling mass per unit of surface area you get as far as loosing ice in the cooler itself.
Doubling the size would cut heat transfer to 1/4th with no more R-Factor in the cooler's envelope.(same wall thickness).
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