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May
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pollutants than conventional heating and cooling systems;
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<div id="keski3"><br/><table class="contentpaneopen"><br/><tbody><br/><tr><br/><td valign="top" colspan="2"><br/><p class="MsoNormal"><img title="Horizontal geothermal ground loops" src="http://www.informedbuilding.com/images/geothermal/horizontal_geothermal_ground_loops.gif" height="304" alt="Example of closed loop horizontal geothermal ground loops" width="319"><img title="Vertical geothermal ground loops" src="http://www.informedbuilding.com/images/geothermal/vertical_geothermal_ground_loops.gif" height="304" alt="Example of closed loop vertical geothermal ground loops" width="300"> </p><br/><p> Source: <a rel="nofollow" href="http://www.energy.gov" title="u.s. department of energy" target="_blank">U.S. Department of Energy</a> </p><br/><h3>Vertical Geothermal Ground Loops </h3><br/><p class="MsoNormal">When extreme climates, limited space or rocky terrain is a <br/>concern, vertical geothermal ground loops are often the only viable <br/>option.<span> </span>This makes them popular for use on small lots and in <br/>retrofits.<span> </span>In <strong><strong>vertical geothermal ground <br/>loops</strong></strong>, a drilling rig is used to drill 150 to 300 foot deep <br/>holes in which hairpin shaped loops of pipe are dropped and then <br/>grouted.<span> </span>A typical vertical ground loop requires 300 to 600 <br/>feet of piping per ton of heating and cooling.<span> </span>Vertical loops <br/>are typically more expensive than horizontal loops, but are considerably less <br/>complicated than drilling for water.<span> </span>Less piping is also <br/>required for vertical geothermal ground loops as opposed to horizontal loops as <br/>the earth’s temperature is more stable at depth.<span> </span></p><br/><h3>Slinky Coil Geothermal Ground Loops </h3><br/><p class="MsoNormal"><strong><strong>Slinky coil geothermal ground <br/>loops</strong></strong> are gaining popularity, particularly in residential <br/>geothermal system installations.<span> </span>Slinky coil ground loops are <br/>essentially a more economic and space efficient version of a horizontal ground <br/>loop.<span> </span>Rather than using straight pipe, slinky coils, as you <br/>might expect, use overlapped loops of piping laid out horizontally along the <br/>bottom of a wide trench.<span> </span>Depending on soil, climate and your <br/>heat pumps’ run fraction, slinky coil trenches can be anywhere from one third to <br/>two thirds shorter than traditional horizontal loop trenches.<span> <br/></span></p><br/><h3>Geothermal Pond Loops </h3><br/><p class="MsoNormal">If at least a ½ acre by 8 ft deep pond or lake is available <br/>on your property, a closed loop geothermal system can be installed by laying <br/>coils of pipe in the bottom of a body of water.<span> <br/></span>However, a horizontal trench will still be needed to bring the loop up to <br/>the home and close the loop.<span> </span>Due to the inherent advantages <br/>of water to water heat transfer, this type of geothermal system is both highly <br/>economical and efficient. </p><br/><p class="MsoNormal"><img title="Pond geothermal ground loop" src="http://www.informedbuilding.com/images/geothermal/pond_geothermal_ground_loop.gif" height="304" alt="Example of closed pond loop geothermal ground loop" width="319"><img title="Open loop geothermal ground loop" src="http://www.informedbuilding.com/images/geothermal/open_loop_geothermal_ground_loop.gif" height="304" alt="Example of open loop vertical geothermal ground loop" width="300"> </p><br/><p>Source: <a rel="nofollow" href="http://www.energy.gov" title="u.s. department of energy" target="_blank">U.S. Department of Energy</a></p><br/><h2>Open Geothermal Ground Loops </h2><br/><p class="MsoNormal">With <strong><strong>open geothermal ground <br/>loops</strong></strong>, rather than continuously running the same supply of <br/>water or antifreeze through the system, fresh water from a well or pond is <br/>pumped into and back out of the geothermal unit.<span> </span>Both an <br/>abundant source of clean water and an adequate runoff area are required for a <br/>successful open loop system.<span> </span>While double well designs can be <br/>economical, use of open geothermal ground loops is generally discouraged and <br/>even prohibited in some jurisdictions.<span> </span>Water quality is key <br/>to an open loop design as mineral content and acidity can quickly damage <br/>geothermal units.<span> </span>Also, improper installation or runoff <br/>management of an open loop geothermal system can result in ground water <br/>contamination or depleted aquifers.<span> </span></p><br/><p class="MsoNormal">Want to know more? Read <a rel="nofollow" href="http://images.google.com/Geothermal/Main16/Geothermal-HVAC-Systems/" title="Geothermal Ground Loops">Geothermal Ground Loops & <br/>Geothermal HVAC Systems </a> </p><br/><p class="MsoNormal"></p><br/><div class="moduletable"><br/><script type="text" /><!--<br/>google_ad_client = "pub-7479341731947713";<br/>//468x60, created 12/28/07<br/>google_ad_slot = "9091975975";<br/>google_ad_width = 468;<br/>google_ad_height = 60;<br/>//--></script><br/><br/><script src="http://pagead2.googlesyndication.com/pagead/show_ads.js" type="text" /><br/></script><br/><br/><script>window.google_render_ad();</script><br/><ins style="PADDING-RIGHT: 0px; PADDING-LEFT: 0px; VISIBILITY: visible; PADDING-BOTTOM: 0px; MARGIN: 0px; WIDTH: 468px; BORDER-TOP-STYLE: none; PADDING-TOP: 0px; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none; POSITION: relative; HEIGHT: 60px; BORDER-BOTTOM-STYLE: none"><ins style="PADDING-RIGHT: 0px; DISPLAY: block; PADDING-LEFT: 0px; VISIBILITY: visible; PADDING-BOTTOM: 0px; 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A Typical Geothermal Power Plant
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This is Billy Collins' website. At this site you can find out more about Billy Collins the former U.S. Poet Lauerate. You can listen to books and readings by Billy Collins. There is also alot of free audio downloads if you wish to do .
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