Date:
1816
 
Category:
Hydro
 
Location:
United States  
 
Event:
Robert Stirling of Scotland invents a power cycle that operates without a high-pressure boiler. In his engine (patented in 1816), air was heated by external combustion through a heat exchanger and then was displaced, compressed and expanded by two pistons. A successful Stirling engine was built for factory use in 1843.

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