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A bicycle pump gets warm. A can of dust spray gets cold. A butane lighter gets cold in your hand as you use it. Those three everyday facts are the whole of refrigeration, and this book takes them from a pump in your hand to the machine in your kitchen, the plant behind a supermarket, and the psychrometric chart an engineer actually uses.
Nothing in the universe makes cold. Every refrigerator, every air conditioner, every heat pump does exactly one thing: it moves heat from where you do not want it to where you do not care. Once that sentence is true for you, the entire subject reorganises itself, and the machine on your wall stops being a black box.
You will measure superheat and subcooling with a clamp thermometer and a pressure gauge and know more about a running system than most people who install them. You will build a thermoelectric cooler and find out why it disappoints. You will work out why a swamp cooler is magnificent in Arizona and useless in Florida, and why a dive shop floats a scuba tank in a bathtub while filling it.
Twenty-four chapters, twenty-two drawn figures, and twenty-four costed bench experiments. Willis Carrier is on the cover because if you could bring one person back to teach you this subject, you would want the man who worked it out in 1911 and whose name is still on the machines.
Every measurement is given in both metric and imperial. The complete book is free at benchdegree.com.
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