Hybrid Car – More Fun with Less Gas

simple stirling hot air engine made at home with simple tools ,2 cans a baloon - Page 11

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Posted by Rick on November 14, 2011, 6:03 pm

I'm sorry Morris but other than replying to the post that apparently
Stirling engines do appear to have at least some practical use in the
conversion of solar energy to electricity, I have no involvement whatsoever,
however this engine manufacturer was mentioned in the Wiki article.


Posted by Rick on November 14, 2011, 6:28 pm

I've actually come across an online instruction manual for the Philips
MP1002CA 230v/180W hot air generator, manufactured back in 1951, I'm
guessing that a version made now, 60 years on, would be considerably more

Posted by vaughn on November 14, 2011, 6:53 pm

How so?

Posted by Rick on November 14, 2011, 8:02 pm

I was thinking along the lines off comparing the efficiency of a 60 year old
cars generator to a modern alternator.

Posted by Daniel who wants to know on November 15, 2011, 7:02 am
The generator was actually likely more efficient than an alternator, they
were phased out because they didn't charge at idle unless a pulley ratio was
used that would make them self destruct at engine redline.

12v alternators are only 50-60% efficient, heck they lose 10% just in the
diodes because they put out roughly 14 volts and there is a .7 volt drop
across each diode, so 1.4 volts for the positive and negative diodes
combined.  A 6v alternator would lose 20% in the diodes, a 24v just 5%, etc.

The rest is lost from powering the field coil, along with eddy current,
hysteresis, and the I2R losses of the stator windings.

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