Stirling versus Otto/Diesel (efficiencies, weights, power output)

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mrockwel
Posts: 2
Joined: Thu Mar 03, 2005 8:08 pm
First Name: michael
Last Name: rockwell

Stirling versus Otto/Diesel (efficiencies, weights, power output)

Post by mrockwel »

For a project in my Thermo II class we were assigned to look up
information about Stirling engines, their current use and possible
future uses as well as advantages and disadvantages. I already have
plenty of examples of possible future uses and the current uses of
Stirling engines. And have my pros and cons fairly well mapped out.

I list size/weight, manufacturing cost, startup time as disadvantages
and noise, efficiency, emmissions and fuel as advantages - what I
really need is some way to quantify this. I could go through cycle
analysis for an otto or diesel cycle if i knew rough temperatures and
intra-cycle efficiencies and then also a reasonable Stirling engine
temperature difference and use ( N1 = 1 - Tc/Th ). That would look
good on my paper since it would show I can analyze a cycle.

However it would also be nice to find charts of example efficiencies
for otto/diesel and efficiencies for Stirling with relation to
weight/power output. I don't know I am really in a bind here,
anything would help. I have scoured the internet and can't find much
that would help me.

If you know of any sources for this information please let me know.
mrockwel
Posts: 2
Joined: Thu Mar 03, 2005 8:08 pm
First Name: michael
Last Name: rockwell

Response to Stirling versus Otto/Diesel (efficiencies, weights, power output)

Post by mrockwel »

I am the original poster, just adding a comment.

For example, the weight/efficiency/power output/manufacturing cost - of a commercial diesel engine intended for small auto use compared to the same numbers for a Stirling engine and then possibly similar numbers for a large yacht type application would be nice.

Or even just the required numbers to caculate such things out. I have experience with very crude analysis of diesel, otto, dual, brayton cycles - but all under a large amount of assumptions involving isentropic expansion/compression, constant pressure, constant volume and such things.
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