https://wiki.opensourceecology.org/index.php?action=history&feed=atom&title=Simcha_Solar 2026-05-05T12:18:23Z Revision history for this page on the wiki MediaWiki 1.39.13 https://wiki.opensourceecology.org/index.php?title=Simcha_Solar&diff=7996&oldid=prev 2009-04-10T18:26:18Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 18:26, 10 April 2009</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l50">Line 50:</td> <td colspan="2" class="diff-lineno">Line 50:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Simcha</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Simcha</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Collaboration_Discussions]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:Collaboration_Discussions]]</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Solar Turbine]]</ins></div></td></tr> <!-- diff cache key wikidb-wiki_:diff::1.12:old-3050:rev-7996 --> </table>

Jeremy https://wiki.opensourceecology.org/index.php?title=Simcha_Solar&diff=3050&oldid=prev 2008-09-15T14:42:19Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 14:42, 15 September 2008</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l49">Line 49:</td> <td colspan="2" class="diff-lineno">Line 49:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Best,</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Best,</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Simcha</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Simcha</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:Collaboration_Discussions]]</ins></div></td></tr> <!-- diff cache key wikidb-wiki_:diff::1.12:old-2963:rev-3050 --> </table>

WikiSysop https://wiki.opensourceecology.org/index.php?title=Simcha_Solar&diff=2963&oldid=prev 2008-09-09T14:16:58Z

<p>New page: S. Edell &lt;edell@kalm.co.il&gt; to Marcin Jakubowski &lt;joseph.dolittle@gmail.com&gt; date Mon, Sep 8, 2008 at 7:58 AM subject RE: Interested in low-cost solar energy hide details Sep 8 (1 day ag...</p> <p><b>New page</b></p><div>S. Edell &lt;edell@kalm.co.il&gt;<br /> to Marcin Jakubowski &lt;joseph.dolittle@gmail.com&gt;<br /> date Mon, Sep 8, 2008 at 7:58 AM<br /> subject RE: Interested in low-cost solar energy<br /> <br /> hide details Sep 8 (1 day ago)<br /> <br /> <br /> Reply<br /> <br /> <br /> Hi Marcin,<br /> <br /> Although I do work at an engineering firm, I myself am not an engineer, but<br /> am head of finances. That&#039;s why I mentioned that I have the ear of the CEO<br /> and might be able to interest him. I also have contacts with a few young<br /> engineers, so anything is possible.<br /> <br /> So: I myself cannot contribute real development, but I am knowledgeable to<br /> understand the needs if brought up to speed, and perhaps then could get<br /> others involved. In what areas do you need the most?<br /> <br /> My most general double-barreled question has to do with predicted cost and<br /> efficiency: 1) what are your most up-to-date estimates of the percentage of<br /> the available power from sunlight that will remain at the end? i.e. if you<br /> assume that insolation levels are 1 kw/h/meter, what remains after all the<br /> inefficiencies? Second, what do you now see as the cost for the total<br /> system?<br /> <br /> Do I understand correctly that you are moving away from a boundary layer<br /> turbine towards a high-recirculation ratio uniflow steam engine? I glanced<br /> at Wikipedia, where it mentions the following disadvantages:<br /> <br /> &quot; In practice the uniflow engine has a number of operational shortcomings.<br /> The large expansion ratio requires a large cylinder volume. To gain the<br /> maximum potential work from this a high reciprocation rate was required,<br /> typically 80% faster than a double-acting engine. This caused the opening<br /> times of the inlet valves to be very short, putting great strain on a<br /> delicate mechanical part. In order to withstand the huge mechanical forces<br /> encountered, engines had to be heavily built and a large flywheel was<br /> required to smooth out the variations in torque as the steam pressure<br /> rapidly rose and fell in the cylinder. Additionally, as there was a thermal<br /> gradient across the cylinder, the metal of the wall expanded to different<br /> extents. This required precise boring of the cylinder barrel to be wider in<br /> the cool centre than at the hot ends. If the cylinder was not heated<br /> correctly, or if water entered, the delicate balance could be upset causing<br /> seizure mid-stroke or, potentially, destruction.&quot;<br /> <br /> Best,<br /> Simcha</div>

WikiSysop