- #1
dr dodge
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I am doing some experimental work with stirling enging design, in order to add supliment the power I use at my house, and want to get some facts straight, and throw out some ideas for discussion (or destruction, as the case may be)
Basic assumptions:(so far)
The more heat differential would mean power potential power.
Thermal creep that allows the cold side to get hot and vise versa decreases efficiency.
Most "normal inefficiencies" that apply to IC recips, will also effect the stirling (drags, stroke/rod ratios, mass/inertia, etc)
"Dead volume" is inefficient
Now some questions.
Rather than a common path for the expand/contract, can separate paths be used, with check valves to control flow?
Does the displacer have to move at the same cycle as the power piston, only 90 degree phase angle?
Is there a formula of temp diff vs ratio of piston sizes?
Is there a formula, or rule of thumb for flywheel selection? (aka vs stroke, piston mass)
thanks,
dr
Basic assumptions:(so far)
The more heat differential would mean power potential power.
Thermal creep that allows the cold side to get hot and vise versa decreases efficiency.
Most "normal inefficiencies" that apply to IC recips, will also effect the stirling (drags, stroke/rod ratios, mass/inertia, etc)
"Dead volume" is inefficient
Now some questions.
Rather than a common path for the expand/contract, can separate paths be used, with check valves to control flow?
Does the displacer have to move at the same cycle as the power piston, only 90 degree phase angle?
Is there a formula of temp diff vs ratio of piston sizes?
Is there a formula, or rule of thumb for flywheel selection? (aka vs stroke, piston mass)
thanks,
dr