please dont rip this site

Stirling Heat Engines

Ernie Rogers says:

All engines approach the Carnot limit about equally well. You may recall that the simple expression of the Carnot limit of efficiency is--

Eff = 1 - TL/TH

where TL is the heat rejection temperature and TH is the heat input temperature.

Both the Stirling engine and the Rankine (steam) engine are external-combustion engines. For external combustion engines, the input temperature is limited by the material properties of the heat exchanger that puts heat into the fluid. This limitation on TH places a severe constraint on the engine efficiency. Single stage steam power plants average about 35% efficiency. My recollection is that the current Stirling engines being produced by Stirling Power Systems, Inc. (check my memory) are 45% efficient.

Internal combustion engines are currently using an input temperature of about 2500 deg. Kelvin, which is much higher than the engines above. They are much less constrained by material properties because the heat is generated within the cylinder. The best known efficiency for such engines is 55%, obtained with the Sulzer two-stroke diesel.

Many combined-cycle (gas/steam) power plants achieve about 55% efficiency, but those plants are using TWO thermodynamic cycles in series, each one much less efficient.

Also:

See also:


file: /Techref/other/stirlingengines.htm, 3KB, , updated: 2014/1/26 11:31, local time: 2017/12/18 09:01,
TOP NEW HELP FIND: 
54.91.171.137:LOG IN

 ©2017 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE! / 

<A HREF="http://www.piclist.com/techref/other/stirlingengines.htm"> Stirling Heat Engines</A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.


Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?

  PICList 2017 contributors:
o List host: MIT, Site host massmind.org, Top posters @20171218 RussellMc, Van Horn, David, Sean Breheny, James Cameron, alan.b.pearce, IVP, Neil, Bob Blick, David C Brown, John Gardner,
* Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.
 

Welcome to www.piclist.com!

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  .