Heat Pumps – History Heat pumps are not new - 1748: William Cullen demonstrates artificial refrigeration.
{"Image DocumentName": "Heat Pumps \u2013 HistoryHeat pumps are not new : William Cullen demonstrates artificial refrigeration.", "Image ImageDescription": "1834: Jacob Perkins builds a practical refrigerator with diethyl ether. 1852: Lord Kelvin describes heat pump theory. 1855\u20131857: Peter Ritter von Rittinger develops and builds the first heat pump using Lord Kelvin\u2019s theory. Ice-making ammonia brine plants were in use in the latter part of the 19th century.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}