Baudelot Cooler. Jean Louis Baudelot (1797–1881), was born in France, and studied engineering in Belgium. Though he claimed several inventions, fame came in 1856, when he patented a liquid cooler, specifically intended for the brewing industry. A cousin who was a brewer presented him with the fact that until then beer worts had to be cooled in a shallow vessel (cool ship) and stirred during a whole night—a process that easily took 8 hours.
Baudelot opened a brewery (later taken over by his son) after patenting his invention, which was nonetheless shamelessly copied. The brewery served for experimenting and bettering his designs. Others also worked on his patent, not least in the US, where a new type was patented as late as 1939.
Though plate heat exchangers and shell-and-tube coolers have taken over, Baudelot coolers are still with us. In industrial/chemical plants, ultrafast cooling is still done by contemporary Baudelots, and in Germany, at least one commercial brewery still uses a stainless steel Baudelot today.