{"id":1003,"date":"2008-02-28T17:39:24","date_gmt":"2008-02-28T09:39:24","guid":{"rendered":"http:\/\/www.intmath.com\/blog\/?p=1003"},"modified":"2018-04-30T16:08:46","modified_gmt":"2018-04-30T08:08:46","slug":"water-from-the-air-using-windmills","status":"publish","type":"post","link":"https:\/\/www.intmath.com\/blog\/environment\/water-from-the-air-using-windmills-1003","title":{"rendered":"Water from the air using windmills"},"content":{"rendered":"<p>A promising Australian invention extracts water from the air using a sustainable energy source - the wind.<\/p>\n<p>Phillip Adams, of The Australian newspaper writes about the <strong>Whisson windmill<\/strong> in \"Water from Wind\" (unfortunately, no longer available):<\/p>\n<blockquote>\n<p>There&rsquo;s a lot of water in the air. It rises from the surface of the oceans to a height of almost 100 kilometres. You feel it in high humidity, but there&rsquo;s almost as much invisible moisture in the air above the Sahara or the Nullarbor as there is in the steamy tropics.<\/p>\n<\/blockquote>\n<p>The design involves a very efficient windmill.<\/p>\n<blockquote>\n<p>Usually a windmill has three blades facing into the wind. But Whisson&rsquo;s design has many blades, each as aerodynamic as an aircraft wing, and each employing &ldquo;lift&rdquo; to get the device spinning. I&rsquo;ve watched them whirr into action in Whisson&rsquo;s wind tunnel at the most minimal settings.<\/p>\n<\/blockquote>\n<p>The windmill includes a water condenser system based on an African insect&rsquo;s method of obtaining water - it just presents its body head-down into the wind and water runs right off its body into its mouth.<\/p>\n<p>From the journal <i>Nature<\/i>:<\/p>\n<blockquote>\n<p>This insect has a tailor-made covering for collecting water from early-morning fog. Some beetles in the Namib Desert collect drinking water from fog-laden wind on their backs.<\/p>\n<\/blockquote>\n<p><img src=\"\/blog\/wp-content\/images\/2008\/02\/stenocara-beetle.jpg\" alt=\"Stenocara beetle\" \/><br \/>\n<span class=\"small\">A stenocara beetle.<\/p>\n<p>Governments should make huge investments into this kind of technology. Already there is a vital need in many countries to extract clean water using sustainable (that is, not using fossil fuels) energy.<\/p>\n<p>Max Whisson has such a solution.<\/p>\n<p><img src=\"\/blog\/wp-content\/images\/2008\/02\/max-whisson.jpg\" alt=\"Max Whisson\" \/><br \/>\n<span style=\"font-size:8pt;\">Max Whisson on a dried out lake bed in Western Australia. <a href=\"http:\/\/www.abc.net.au\/austory\/specials\/windmills\/default.htm\">Image source<\/a><\/span><\/p>\n<p>Here&rsquo;s a brief animation showing the concept. (There is no sound.)<\/p>\n<div class=\"videoBG\">\n<iframe title=\"YouTube video player\" width=\"480\" height=\"303\" src=\"https:\/\/www.youtube.com\/embed\/Gf0krn99Y20\" frameborder=\"0\" allowfullscreen><\/iframe>\n<\/div>\n<p>You can see a video on <a href=\"http:\/\/www.abc.net.au\/austory\/specials\/windmills\/default.htm\">Max Whisson&rsquo;s windmill<\/a> from Australia&rsquo;s ABC TV.<\/p>\n<h2>Reality Check<\/h2>\n<p>There are quite a few naysayers commenting about this invention. For example, in the <a href=\"http:\/\/www2b.abc.net.au\/tmb\/Client\/Message.aspx?b=25&m=1416&ps=20&dm=1&pd=3\">ABC&rsquo;s forum<\/a>, we read:<\/p>\n<blockquote>\n<p>Based on the show and the information on the Water Unlimited website he&rsquo;s claiming that a 4 square metre unit will produce 6300 litres of water a day for 15 km\/h winds.<\/p>\n<p>The maximum energy available in 4 square metres of wind at 15 km\/h is 105 Watts, or 2.5 kWh per day.<\/p>\n<p>A very good de-humidifier requires 0.36 kWh per litre, so the *best* we can expect from one of these devices is less than 7 litres of water a day.<\/p>\n<\/blockquote>\n<p>And then there&rsquo;s <a href=\"http:\/\/blogs.theage.com.au\/lifestyle\/renovationnation\/archives\/2007\/06\/dr_maxs_windmil_1.html\">Major Malfunction in The Age<\/a>, who says:<\/p>\n<blockquote>\n<p>I&rsquo;ve done some calculations according to Whisson&rsquo;s own yield estimates and the laws of physics, and yes... The power required (for the small unit) is in the megawatt range.<\/p>\n<p>Damned reality. Always getting in the way of a good idea...<\/p>\n<\/blockquote>\n<p>So there&rsquo;s a challenge for you mathematicians and physicists. Will this work, or is it another good idea doomed to failure?<\/p>\n<p class=\"alt\">See the <a href=\"https:\/\/www.intmath.com\/blog\/environment\/water-from-the-air-using-windmills-1003#comments\" id=\"comms\">2 Comments<\/a> below.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><a href=\"https:\/\/www.intmath.com\/blog\/environment\/water-from-the-air-using-windmills-1003\"><img src='\/blog\/wp-content\/images\/2008\/02\/stenocara-beetle.thumbnail.jpg' alt='Stenocara beetle' class=\"imgRt\" \/><\/a>An Australian invention shows great promise in extracting water from the air using an efficient windmill and a condenser based on the African stenocara beetle.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mo_disable_npp":""},"categories":[6],"tags":[130],"_links":{"self":[{"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/posts\/1003"}],"collection":[{"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/comments?post=1003"}],"version-history":[{"count":1,"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/posts\/1003\/revisions"}],"predecessor-version":[{"id":11456,"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/posts\/1003\/revisions\/11456"}],"wp:attachment":[{"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/media?parent=1003"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/categories?post=1003"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.intmath.com\/blog\/wp-json\/wp\/v2\/tags?post=1003"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}