<div dir="ltr">Hi All,<div><br></div><div>Forget small scale steam for electric power generation. Very low overall conversion efficiency and a full-time control problem to prevent potential steam explosions, make this a technology cul-de-sac not worth exploring. </div>
<div><br></div><div>The efficiency of a good downdraft gasifier and internal combustion engine will produce four times as much electricity as any steam engine could - for the same quantity of wood fuel.</div><div><br></div>
<div>I've recently been doing test runs on an APL 20kW Power Pallet, and saw 49.5kWh of electricity produced in 2.75 hours from a standard 200 litre (55 US gal) oil drum of woodchip fuel.</div><div><br></div><div>regards</div>
<div><br></div><div><br></div><div>Ken</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On 1 December 2013 16:29, <span dir="ltr"><<a href="mailto:sabbadess@aol.com" target="_blank">sabbadess@aol.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><font color="black" face="arial">
<div>Paul,</div>
<div> </div>
<div>I actually built a prototype that did this:</div>
<div> </div>
<div><a href="http://www.youtube.com/watch?v=AIFTBITYjb0" target="_blank">http://www.youtube.com/watch?v=AIFTBITYjb0</a></div>
<div> </div>
<div>I found that small steam at the residential scale is just a bad idea. The first major problem is wet layup seizing all the parts together. Then there are the thermal lags of the gasifier and boiler for a step change in electrical load. Then there is the corrosion/explosion hazard.....It just kept getting worse even though it sounded great in theory. I am FAR happier with my gasifier/engine combo.</div>
<div> </div>
<div>Stephen Abbadessa</div>
<div></div>
<div></div>
<div style="font-size:10pt;font-family:arial,helvetica"><div><div class="h5">-----Original Message-----<br>
From: Paul Anderson <<a href="mailto:psanders@ilstu.edu" target="_blank">psanders@ilstu.edu</a>><br>
To: Discussion of biomass pyrolysis and gasification <<a href="mailto:gasification@lists.bioenergylists.org" target="_blank">gasification@lists.bioenergylists.org</a>><br>
Sent: Sun, Dec 1, 2013 11:21 am<br>
Subject: [Gasification] Small steam systems plus gasifiers for electricity<br>
<br>
<div>
<div text="#000000" bgcolor="#FFFFFF">
<div>Dear Tom, Thomas and all,<br>
<pre cols="72"></pre>
On 11/30/2013 5:44 PM, Thomas Koch wrote:<br>
</div>
<blockquote type="cite">
<pre>Tom
.....
I can only agree that for small systems steam systems looks as the most reliable way to produce electricity
Thomas
</pre>
</blockquote>
This "low tech" approach appeals to me (and maybe to some others)
because the Up Draft gasifiers are great for making clean heat, of
which much gets wasted in cases such as people making char and
biochar. <br>
<br>
I acknowledge that the <u>small steam systems for electricity</u>
do not require gasification technologies, and therefore this topic
should soon be off of the Gasification Listserv. But for the
moment, who are the readers who have interest in taking this
discussion further? <br>
<br>
Paul<br>
<pre cols="72">Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: <a href="mailto:psanders@ilstu.edu" target="_blank">psanders@ilstu.edu</a>
Skype: paultlud Phone: <a href="tel:%2B1-309-452-7072" value="+13094527072" target="_blank">+1-309-452-7072</a>
Website: <a href="http://www.drtlud.com" target="_blank">www.drtlud.com</a></pre>
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