Elliott J. Stoddard invented and patented two versions of the Stoddard engine, the first in 1919 and the second in 1933. The general engine classification is an external combustion engine with valves and single-phase gaseous working fluid (i.e. a "hot air engine"). The internal working fluid was originally air, although in modern versions, other gases such as helium or hydrogen may be used.
One potential thermodynamic advantage of using valves is to minimize the adverse effects of "unswept volume" in the heat exchangers (sometimes called "dead volume"), which is known to reduce engine efficiency and power output in the valveless Stirling engine.
The engine design in the patent was using a scotch yoke.
The 1933 Stoddard engineedit
In the 1933 design,[2] Stoddard reduced the internal volume of the heat exchangers maintaining the same generalized thermodynamic processes as the 1919 cycle.
Wikimedia Commons has media related to Stoddard engine.
February 15, 2024
stoddard, engine, elliott, stoddard, invented, patented, versions, first, 1919, second, 1933, general, engine, classification, external, combustion, engine, with, valves, single, phase, gaseous, working, fluid, engine, internal, working, fluid, originally, alt. Elliott J Stoddard invented and patented two versions of the Stoddard engine the first in 1919 and the second in 1933 The general engine classification is an external combustion engine with valves and single phase gaseous working fluid i e a hot air engine The internal working fluid was originally air although in modern versions other gases such as helium or hydrogen may be used One potential thermodynamic advantage of using valves is to minimize the adverse effects of unswept volume in the heat exchangers sometimes called dead volume which is known to reduce engine efficiency and power output in the valveless Stirling engine Contents 1 The 1919 Stoddard engine 2 The 1933 Stoddard engine 3 Gallery 4 References 5 External linksThe 1919 Stoddard engine editThe generalized thermodynamic processes of the 1919 Stoddard cycle are 1 Adiabatic compression Isobaric heat addition Adiabatic expansion Isobaric heat removalThe engine design in the patent was using a scotch yoke The 1933 Stoddard engine editIn the 1933 design 2 Stoddard reduced the internal volume of the heat exchangers maintaining the same generalized thermodynamic processes as the 1919 cycle Gallery editStoddard engine diagrams nbsp The 1919 Stoddard Engine nbsp The 1933 Stoddard EngineReferences edit 1919 Stoddard Engine US Patent 1933 Stoddard Engine US PatentExternal links edit nbsp Wikimedia Commons has media related to Stoddard engine Retrieved from https en wikipedia org w index php title Stoddard engine amp oldid 1192827248, wikipedia, wiki, book, books, library,
