The heat pump principle was discovered before the turn of the century as the basis of all refrigeration. The principle of using a heat engine in a reverse mode as a heat pump was proposed by Lord Kelvin in the nineteenth century, but it was only in the... Exergy: Energy, Environment and Sustainable Development - Page 91 by Marc A Rosen, Ibrahim Dincer, Marc A. Rosen - 2007 - 472 pages Limited preview -
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