<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>On 05/01/2012, at 8:02 AM, Lincoln Dale wrote:</div></div></div></span></span></div><div><blockquote type="cite"><div class="gmail_quote"><div><font class="Apple-style-span" color="#000000"><br></font>its also not "poor" given the ambient temperatures seen in the geography where the site is located.<br>
the physical site is more about where there is "cheap power" and "cheap land", not "optimal ambient temperatures".<br>i'd hate to see how much water they go through though!<br></div></div></blockquote></div><br><div>High Ambient temperature is not necessarily the determining factor in your cooling power costs.</div><div><br></div><div>If you're prepared to use evaporative cooling, you can get an energy "free ride" down to the "wet bulb temperature".</div><div><br></div><div>In hot, dry climates like Nevada, Adelaide, or even Western Sydney, it's possible to run the cooling for a datacentre more efficiently than an equivalent facility by the sea. This may seem counter-intuitive, but most things in thermodynamics are :)</div><div><br></div><div>There's an argument that evaporative cooling wastes precious water - but in a country like ours where we burn stuff to make steam to get energy, it's a lesser evil.</div><div><br></div><div>Seeley in Adelaide have developed their "climate wizard" product to take advantage of this phenomenon and reduce energy costs, so it can be used to pre-cool the air for a more traditional air conditioning plant, or replace it altogether where high air flows are appropriate (not usually a problem in a DC!).</div><div><br></div><div>John</div><div><br></div></body></html>