INTRO Ever wonder what applications looked like a century ago? Here is the story of Richard Mollier one of the first programmers in an era before smartphones and computers. Richard Mollier was a professor of Applied Physics and Mechanics and a pioneer of experimental research in thermodynamics in the late 19th century. He carried out meticulous calculations for every state and property of air. The result: the emblematic HX diagram. An easy-to-read tool still in use today. In this whitepaper we explain what the Mollier diagram is and how to read it.
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