Posted by Steve@Advance on July 02, 2018 at 18:31:19 from (66.169.147.211):
In Reply to: Re: The End Of An Era posted by gtractorfan on July 02, 2018 at 17:34:36:
"would it work to use a diesel engine like the ones now in use but instead of generating electricity use it to compress air and use the compressed air like a steam engine"? Could it be efficient?
Afraid not.
A couple reasons, more moving parts to rob power. It would need a compressor AND air powered drive system. Both would be major sources of inefficiency. But the biggest reason, air does not react like steam. As steam looses it's initial pressure as the cylinder extends, the steam continues to expand, carrying the charge throughout the full length of the power stroke with power to spare. Air is just compressed air. Once it looses it initial charge, it rapidly dwindles down.
But, there are air powered engines! They are used in mining operations. Look just like a miniature steam engine with cylinders and connecting rods on the sides. The reasons for use though is not efficiency, but because there is no exhaust smoke, no flames or sparks, and air is already available.
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