By T. Finlekstein, A. Organ
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Additional resources for Air Engines - The History, Science, and Reality of the Perfect Engine
5398 of 1826, referred to an engine which had a compressor cylinder delivering pressurized air to a hermetically sealed furnace. The products of combustion were passed through a vessel fitted with shelves over which water was made to trickle. The mixture of steam and hot gases was then used to drive his engine (Bourne op. ). Ericsson also built an air engine in 1833 which, as far as can be ascertained today, used a closed cycle with constant-pressure heating and cooling. No detailed records of this construction have survived, but it seems (Anon.
Other earlier engines, such as Hook’s engine and A. and F. Brown’s of New York, also differed in minor detail. For example, in Brown’s engine, the cylinders were separate instead of coaxial (Knoke op. ). Several other engines using a similar working principle to the two types described here were proposed. For example, an engine (Patent No. 3807, Söderström 1868) used a single cylinder in direct communication with the furnace and a piston working as compressor on the downstroke, and expander on the upstroke.
Stirling 1845). With relatively short displacer cylinders in earlier engines, the upper ends still tended to become hot and in this model the whole cylinder was therefore made much longer. The regenerator R and the cooler W were transferred to a separate enclosure outside the cylinder, with three connecting ducts to the bottom H of the displacer cylinder and one to the pipe C leading to the power cylinder. 020 in wide. To reduce longitudinal heat conduction, the regenerator was subdivided into four stacks.