Hi all,
Does anyone know roughly the efficiency of Robert Stirling's first air
engines that used to produce about 3 horsepower?? I have heard about
0.2% but this seems very low to me.
Any help would be great! thanks
The efficiency of the first Stirling engines?
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Response to The efficiency of the first Stirling engines?
Rod,
Efficiency in what terms?
In Stirling's time they measured in tons of coal per hour, per HP.
I have seen HP values of less than 1 to over 3 given to this engine. I would question any account of actual horsepower over 1 HP from that time. A very detailed analysis of the 1816 design is given by Finkelstein and Organ in "Air Engines". However, they claim that no known value exhists for the working RPM and so they estimate it to be 29, based on the construction limitaions of the flywheel. From what they know about the working temperatures and other factors they came up with .6 HP at 29 RPM.
Rick
Efficiency in what terms?
In Stirling's time they measured in tons of coal per hour, per HP.
I have seen HP values of less than 1 to over 3 given to this engine. I would question any account of actual horsepower over 1 HP from that time. A very detailed analysis of the 1816 design is given by Finkelstein and Organ in "Air Engines". However, they claim that no known value exhists for the working RPM and so they estimate it to be 29, based on the construction limitaions of the flywheel. From what they know about the working temperatures and other factors they came up with .6 HP at 29 RPM.
Rick