https://lunarpedia.org/index.php?title=Solar_Furnace&feed=atom&action=historySolar Furnace - Revision history2024-03-28T18:14:31ZRevision history for this page on the wikiMediaWiki 1.34.2https://lunarpedia.org/index.php?title=Solar_Furnace&diff=12940&oldid=prevJarogers2001 at 01:37, 11 August 20082008-08-11T01:37:16Z<p></p>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; 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;">{{Eng Stub}}</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; 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;"></ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>At an intensity of 1366 watts/m2, the lunar surface is idea for the use of solar furnace technology. By concentrating the sunlight on to a small area you can raise the temperature well past that necessary to melt [[iron]], [[regolith]], incubate sealed containers to make [[silane]] or drive water off [[lunar soil]]. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>At an intensity of 1366 watts/m2, the lunar surface is idea for the use of solar furnace technology. By concentrating the sunlight on to a small area you can raise the temperature well past that necessary to melt [[iron]], [[regolith]], incubate sealed containers to make [[silane]] or drive water off [[lunar soil]]. </div></td></tr>
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</table>Jarogers2001https://lunarpedia.org/index.php?title=Solar_Furnace&diff=6893&oldid=prevCfrjlr: typos2007-03-24T19:26:33Z<p>typos</p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 19:26, 24 March 2007</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>At an intensity of 1366 watts/m2, the lunar surface is idea for the use of solar furnace technology. By concentrating the sunlight on to a small area you can raise the temperature well past that necessary to melt [[iron]], [[regolith]], incubate sealed containers to make [[silane]] or drive water off [[lunar soil]]. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>At an intensity of 1366 watts/m2, the lunar surface is idea for the use of solar furnace technology. By concentrating the sunlight on to a small area you can raise the temperature well past that necessary to melt [[iron]], [[regolith]], incubate sealed containers to make [[silane]] or drive water off [[lunar soil]]. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Except for fresnel lenses which are great for [[solar welding]], the design involves using mirrors coated with [[aluminum]] to reflect the sunlight to a small point. The back of the mirror can be of any rigid material and [[aluminum]] is a common element on the moon with a silver like reflective properties. Due to the lack of wind and lower gravity of the moon, less than a tenth of materials are required to make similar size furnace compared to earth. </div></td><td class='diff-marker'>+</td><td style="color: #222; 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>Except for fresnel lenses which are great for [[solar welding]], the design involves using mirrors coated with [[aluminum]] to reflect the sunlight to a small point. The back of the mirror can be of any rigid material and [[aluminum]] is a common element on the moon with a silver like reflective properties. Due to the lack of wind and lower <ins class="diffchange diffchange-inline">[[</ins>gravity<ins class="diffchange diffchange-inline">]] </ins>of the moon, less than a tenth of <ins class="diffchange diffchange-inline">[[</ins>materials<ins class="diffchange diffchange-inline">]] </ins>are required to make similar size furnace compared to earth. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>See [[Solar Thermal]] for details of how to use a solar furnace to generate energy. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>See [[Solar Thermal]] for details of how to use a solar furnace to generate energy. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The <del class="diffchange diffchange-inline">idea </del>location of a solar furnace is at the lunar poles. This is because a vertical orientation allows for easier access to where the point of concentration is and the sunlight is virtually continuous for half the year if not all of it. Closer to the equator and you have the problem of a more horizontal axis and that means that your focal spot is above you in a hard to reach location thus limiting its efficiency. </div></td><td class='diff-marker'>+</td><td style="color: #222; 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>The <ins class="diffchange diffchange-inline">ideal </ins>location of a solar furnace is at the lunar poles. This is because a vertical orientation allows for easier access to where the point of concentration is and the sunlight is virtually continuous for half the year if not all of it. Closer to the equator and you have the problem of a more horizontal axis and that means that your focal spot is above you in a hard to reach location thus limiting its efficiency. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>==Concentration methods== </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>==Concentration methods== </div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l13" >Line 13:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>This design focus all of the energy on a small point that blurs due to the perceived width of the sun. Reflective designs do not have the separation of light frequencies that refractive methods have and are thus simpler to focus. The only limit on the diameter is how big your mounting platform can handle in terms of weight. Using materials slightly thicker than foil is fully workable. The advantage of this design is that it has both a single focus point and single point of angle adjustment. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>This design focus all of the energy on a small point that blurs due to the perceived width of the sun. Reflective designs do not have the separation of light frequencies that refractive methods have and are thus simpler to focus. The only limit on the diameter is how big your mounting platform can handle in terms of weight. Using materials slightly thicker than foil is fully workable. The advantage of this design is that it has both a single focus point and single point of angle adjustment. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Fresnel <del class="diffchange diffchange-inline">lense </del></div></td><td class='diff-marker'>+</td><td style="color: #222; 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 class="diffchange diffchange-inline">[[</ins>Fresnel <ins class="diffchange diffchange-inline">lens]]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>This involves a transparent sheet with <del class="diffchange diffchange-inline">groves </del>that act like miniature lenses. If you use this to focus light on a highly reflective solar tube, you can transfer this heat to a specific location several meters away. For the needs of welding, this would be very useful. A fresnel <del class="diffchange diffchange-inline">lense </del>of a meter in diameter would be enough to raise the focus temperature well over that needed to fuse iron. Any bigger than this and you are likely to have problems. </div></td><td class='diff-marker'>+</td><td style="color: #222; 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>This involves a transparent sheet with <ins class="diffchange diffchange-inline">grooves </ins>that act like miniature lenses. If you use this to focus light on a highly reflective solar tube, you can transfer this heat to a specific location several meters away. For the needs of welding, this would be very useful. A fresnel <ins class="diffchange diffchange-inline">lens </ins>of a meter in diameter would be enough to raise the focus temperature well over that needed to fuse iron. Any bigger than this and you are likely to have problems. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>Mirror arrays </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>Mirror arrays </div></td></tr>
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</table>Cfrjlrhttps://lunarpedia.org/index.php?title=Solar_Furnace&diff=6892&oldid=prevCfrjlr: cat isru2007-03-24T19:20:15Z<p>cat isru</p>
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</table>Cfrjlrhttps://lunarpedia.org/index.php?title=Solar_Furnace&diff=6891&oldid=prevCfrjlr: Category:Hardware2007-03-24T18:56:08Z<p><a href="/w/Category:Hardware" title="Category:Hardware">Category:Hardware</a></p>
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</table>Cfrjlrhttps://lunarpedia.org/index.php?title=Solar_Furnace&diff=6890&oldid=prevCfrjlr: cats2007-03-24T18:54:38Z<p>cats</p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>The second is long mirrors that do not concentrate the sunlight to a point. This is desirable for packing because to get high density you need a regular shape. This would be efficient for really large scale solar furnaces where the target point is a strip where things heat up. This is the environment you need for melting things or keeping them at a high temperature for a long time.</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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>The second is long mirrors that do not concentrate the sunlight to a point. This is desirable for packing because to get high density you need a regular shape. This would be efficient for really large scale solar furnaces where the target point is a strip where things heat up. This is the environment you need for melting things or keeping them at a high temperature for a long time.</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; 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;"></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; 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:Settlement]]</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; 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:Chemistry]]</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #222; 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:Mining]]</ins></div></td></tr>
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</table>Cfrjlrhttps://lunarpedia.org/index.php?title=Solar_Furnace&diff=6889&oldid=prevCfrjlr: typos2007-03-24T18:52:15Z<p>typos</p>
<table class="diff diff-contentalign-left" data-mw="interface">
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 18:52, 24 March 2007</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l1" >Line 1:</td>
<td colspan="2" class="diff-lineno">Line 1:</td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>At an intensity of 1366 watts/m2, the lunar surface is idea for the use of solar <del class="diffchange diffchange-inline">funance </del>technology. <del class="diffchange diffchange-inline"> </del>By concentrating the sunlight on to a small area you can raise the temperature well past that necessary to melt [[iron]], [[<del class="diffchange diffchange-inline">regiolith</del>]], incubate sealed containers to make [[silane]] or drive water off [[lunar soil]].</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>At an intensity of 1366 watts/m2, the lunar surface is idea for the use of solar <ins class="diffchange diffchange-inline">furnace </ins>technology. By concentrating the sunlight on to a small area you can raise the temperature well past that necessary to melt [[iron]], [[<ins class="diffchange diffchange-inline">regolith</ins>]], incubate sealed containers to make [[silane]] or drive water off [[lunar soil]]. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Except for fresnel lenses which are great for [[solar welding]], the design involves using mirrors coated with [[aluminum]] to reflect the sunlight to a small point. <del class="diffchange diffchange-inline"> </del>The back of the mirror can be of any rigid material and [[aluminum]] is a common element on the moon with a silver like reflective properties. <del class="diffchange diffchange-inline"> </del>Due to the lack of wind and lower gravity of the moon, less than a tenth of materials are required to make similar size furnace compared to earth.</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>Except for fresnel lenses which are great for [[solar welding]], the design involves using mirrors coated with [[aluminum]] to reflect the sunlight to a small point. The back of the mirror can be of any rigid material and [[aluminum]] is a common element on the moon with a silver like reflective properties. Due to the lack of wind and lower gravity of the moon, less than a tenth of materials are required to make similar size furnace compared to earth. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>See [[Solar Thermal]] for details of how to use a solar <del class="diffchange diffchange-inline">funace </del>to generate energy.</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>See [[Solar Thermal]] for details of how to use a solar <ins class="diffchange diffchange-inline">furnace </ins>to generate energy. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The idea location of a solar furnace is at the lunar poles. <del class="diffchange diffchange-inline"> </del>This is because a vertical orientation allows for easier access to where the point of concentration is and the sunlight is virtually continuous for half the year if not all of it. <del class="diffchange diffchange-inline"> </del>Closer to the equator and you have the problem of a more horizontal axis and that means that your focal spot is above you in a hard to reach location thus limiting its efficiency.</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>The idea location of a solar furnace is at the lunar poles. This is because a vertical orientation allows for easier access to where the point of concentration is and the sunlight is virtually continuous for half the year if not all of it. Closer to the equator and you have the problem of a more horizontal axis and that means that your focal spot is above you in a hard to reach location thus limiting its efficiency. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>==Concentration methods==</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>==Concentration methods== </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Parabolic mirror</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>Parabolic mirror </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>This design focus all of the energy on a small point that <del class="diffchange diffchange-inline">blurrs </del>due to the perceived width of the sun. <del class="diffchange diffchange-inline"> </del>Reflective designs do not have the separation of light frequencies that refractive methods have and are thus simpler to focus. <del class="diffchange diffchange-inline"> </del>The only limit on the diameter is how big your mounting platform can handle in terms of weight. <del class="diffchange diffchange-inline"> </del>Using materials slightly thicker than foil is fully workable. <del class="diffchange diffchange-inline"> </del>The advantage of this design is that it has both a single focus point and single point of angle adjustment.</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>This design focus all of the energy on a small point that <ins class="diffchange diffchange-inline">blurs </ins>due to the perceived width of the sun. Reflective designs do not have the separation of light frequencies that refractive methods have and are thus simpler to focus. The only limit on the diameter is how big your mounting platform can handle in terms of weight. Using materials slightly thicker than foil is fully workable. The advantage of this design is that it has both a single focus point and single point of angle adjustment. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Fresnel lense</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>Fresnel lense </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>This involves a transparent sheet with groves that act like <del class="diffchange diffchange-inline">minature </del>lenses. <del class="diffchange diffchange-inline"> </del>If you use this to focus light on a highly reflective solar tube, you can transfer this heat to a specific location several meters away. <del class="diffchange diffchange-inline"> </del>For the needs of welding, this would be very useful. <del class="diffchange diffchange-inline"> </del>A fresnel lense of a meter in diameter would be enough to raise the focus temperature well over that needed to fuse iron. <del class="diffchange diffchange-inline"> </del>Any bigger than this and you are likely to have problems.</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>This involves a transparent sheet with groves that act like <ins class="diffchange diffchange-inline">miniature </ins>lenses. If you use this to focus light on a highly reflective solar tube, you can transfer this heat to a specific location several meters away. For the needs of welding, this would be very useful. A fresnel lense of a meter in diameter would be enough to raise the focus temperature well over that needed to fuse iron. Any bigger than this and you are likely to have problems. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Mirror arrays</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>Mirror arrays </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>This can come in two forms. <del class="diffchange diffchange-inline"> </del>The first is an array of flat mirrors scattered over the surface each with their own targeting control. <del class="diffchange diffchange-inline"> </del>This is currently being used in the desert to generate power on earth.</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>This can come in two forms. The first is an array of flat mirrors scattered over the surface each with their own targeting control. This is currently being used in the desert to generate power on earth. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; 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;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The second is long mirrors that do not concentrate the sunlight to a point. <del class="diffchange diffchange-inline"> </del>This is desirable for packing because to get high density you need a regular shape. <del class="diffchange diffchange-inline"> </del>This would be efficient for really large scale solar <del class="diffchange diffchange-inline">funaces </del>where the target point is a strip where things heat up. <del class="diffchange diffchange-inline"> </del>This is the environment you need for melting things or keeping them at a high temperature for a long time.</div></td><td class='diff-marker'>+</td><td style="color: #222; 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>The second is long mirrors that do not concentrate the sunlight to a point. This is desirable for packing because to get high density you need a regular shape. This would be efficient for really large scale solar <ins class="diffchange diffchange-inline">furnaces </ins>where the target point is a strip where things heat up. This is the environment you need for melting things or keeping them at a high temperature for a long time.</div></td></tr>
<!-- diff cache key lunarpedia_prod-mw_:diff::1.12:old-6886:rev-6889 -->
</table>Cfrjlrhttps://lunarpedia.org/index.php?title=Solar_Furnace&diff=6886&oldid=prevArolah: New page: At an intensity of 1366 watts/m2, the lunar surface is idea for the use of solar funance technology. By concentrating the sunlight on to a small area you can raise the temperature well pa...2007-03-24T18:49:08Z<p>New page: At an intensity of 1366 watts/m2, the lunar surface is idea for the use of solar funance technology. By concentrating the sunlight on to a small area you can raise the temperature well pa...</p>
<p><b>New page</b></p><div>At an intensity of 1366 watts/m2, the lunar surface is idea for the use of solar funance technology. By concentrating the sunlight on to a small area you can raise the temperature well past that necessary to melt [[iron]], [[regiolith]], incubate sealed containers to make [[silane]] or drive water off [[lunar soil]].<br />
<br />
Except for fresnel lenses which are great for [[solar welding]], the design involves using mirrors coated with [[aluminum]] to reflect the sunlight to a small point. The back of the mirror can be of any rigid material and [[aluminum]] is a common element on the moon with a silver like reflective properties. Due to the lack of wind and lower gravity of the moon, less than a tenth of materials are required to make similar size furnace compared to earth.<br />
<br />
See [[Solar Thermal]] for details of how to use a solar funace to generate energy.<br />
<br />
The idea location of a solar furnace is at the lunar poles. This is because a vertical orientation allows for easier access to where the point of concentration is and the sunlight is virtually continuous for half the year if not all of it. Closer to the equator and you have the problem of a more horizontal axis and that means that your focal spot is above you in a hard to reach location thus limiting its efficiency.<br />
<br />
==Concentration methods==<br />
<br />
Parabolic mirror<br />
<br />
This design focus all of the energy on a small point that blurrs due to the perceived width of the sun. Reflective designs do not have the separation of light frequencies that refractive methods have and are thus simpler to focus. The only limit on the diameter is how big your mounting platform can handle in terms of weight. Using materials slightly thicker than foil is fully workable. The advantage of this design is that it has both a single focus point and single point of angle adjustment.<br />
<br />
Fresnel lense<br />
<br />
This involves a transparent sheet with groves that act like minature lenses. If you use this to focus light on a highly reflective solar tube, you can transfer this heat to a specific location several meters away. For the needs of welding, this would be very useful. A fresnel lense of a meter in diameter would be enough to raise the focus temperature well over that needed to fuse iron. Any bigger than this and you are likely to have problems.<br />
<br />
Mirror arrays<br />
<br />
This can come in two forms. The first is an array of flat mirrors scattered over the surface each with their own targeting control. This is currently being used in the desert to generate power on earth.<br />
<br />
The second is long mirrors that do not concentrate the sunlight to a point. This is desirable for packing because to get high density you need a regular shape. This would be efficient for really large scale solar funaces where the target point is a strip where things heat up. This is the environment you need for melting things or keeping them at a high temperature for a long time.</div>Arolah