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Heat Pump or Heat Engine?

I haven’t bent any copper for a few weeks now.  Between the heat, a vacation, and some bad habits, the shop has barely been opened.  Part of the reason is due to a recent fascination with power plants.  Previously, in

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Posted in Personal, Refrigeration, The Squatch, Water

Excerpts from “Elementary Mechanical Refrigeration” by Fred E Matthews, 1912

The following are several pages taken from the above mentioned book.  A similar explanation is more or less copied in “Power’s Principles of Refrigeration” of which I have a 1921 copy.  Take special note of the beautiful illustration below.  Clicking

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Posted in Old Refrigeration Texts, Refrigeration

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