AHAM BTU Calculator - This worksheet by the Association of Home Appliance Manufacturers can help you estimate how much cooling capacity you need.
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Ice Cream Manufacture - The basic steps in the manufacturing of ice cream are generally as follows: blending of the mix ingredients,
pasteurization,
homogenization,
aging the mix,
freezing,
packaging and
hardening.
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Refrigeration Basics - (Aire Kool Refrigeration) This site explains in basic terms the principals that are used to create the refrigeration effect.