<div dir="ltr"><div dir="ltr"><div dir="ltr"><span style="text-align:left;color:rgb(34,34,34);text-transform:none;text-indent:0px;letter-spacing:normal;font-family:Arial,Helvetica,sans-serif;font-size:13.33px;font-style:normal;font-variant:normal;font-weight:400;text-decoration:none;word-spacing:0px;display:inline;white-space:normal;float:none;background-color:rgb(255,255,255)">> Honestly, though, I think most of this is moot. With direct-contact
liquid cooling and warm-water cooling, I think for most data
centers, cooling to ambient air should be adequate. For >places where
that isn't enough, I would think a shallow, man-made cooling pond on
premises would be an adequate heat sink, without having to go all
the way to the ocean. By keeping >it shallow, at night when it cools
off, the pond could dump a lot of its heat to the atmosphere. </span></div><div dir="ltr"><br></div><div>Something like this perhaps?<br></div><div dir="ltr"><a href="https://youtu.be/0gCXfWCLZAA">https://youtu.be/0gCXfWCLZAA</a><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div></div></div><br><div class="gmail_quote"><div dir="ltr">On Mon, 5 Nov 2018 at 16:01, Prentice Bisbal via Beowulf <<a href="mailto:beowulf@beowulf.org">beowulf@beowulf.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
<pre class="m_-239222114683837985moz-signature" cols="72">Prentice </pre>
<div class="m_-239222114683837985moz-cite-prefix">On 11/05/2018 06:02 AM, Stu Midgley
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">As far as I can tell, they are just using the salt
water to reject the heat to. How they get the heat from the
cpu/hot bits to the water is not clearly stated...
<div><br>
</div>
<div>A passive heat exchanger would make energy sense... but
would cost a bomb in engineering... maybe direct fluid
cooling (asetek) with a heat-exchanger to the salt water?</div>
<div><br>
</div>
<div>Either way, its stupid. They could just easily pump the
cool salt water from the ocean into a DC, reject heat to it
using the same methods... and pump it back to the ocean.
Since no real delta in height, it would be efficient in
energy.</div>
</div>
</blockquote>
The issue with this would be the increased maintenance cost of the
equipment pumping the salt water to the the DC, do to the corrosion
from the salt water, and overall 'dirtiness' of the saltwater. A
better approach would be to have a closed loop of treated freshwater
going from the data center to the a heat exchanger submerged in the
sea. This should reduce maintenance costs for the system.<br>
<br>
Honestly, though, I think most of this is moot. With direct-contact
liquid cooling and warm-water cooling, I think for most data
centers, cooling to ambient air should be adequate. For places where
that isn't enough, I would think a shallow, man-made cooling pond on
premises would be an adequate heat sink, without having to go all
the way to the ocean. By keeping it shallow, at night when it cools
off, the pond could dump a lot of its heat to the atmosphere. <br>
<blockquote type="cite">
<div dir="ltr">
<div><br>
</div>
<div>OR... just use a boat...</div>
<div><br>
</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Mon, Nov 5, 2018 at 2:27 PM <<a href="mailto:jaquilina@eagleeyet.net" target="_blank">jaquilina@eagleeyet.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Probably a
stupid question here,<br>
<br>
What is the advantage of using salty sea water lets say over
for example <br>
mineral oil? I have seen on you tube these guys showing that a
pc will <br>
still run in a fish tank and all components submerged in
mineral oil? <br>
Yes it will be messier to change components but would the use
of mineral <br>
oil be more efficient?<br>
<br>
<br>
On 2018-11-04 14:10, Gerald Henriksen wrote:<br>
> On Sat, 3 Nov 2018 18:27:05 +0000, you wrote:<br>
> <br>
>> I’m not sure there’s a huge population of Xcloud-Xbox
gamers in <br>
>> Orkney. There's not much daylight this time of year,
of course, so <br>
>> maybe that's what those Orcadians are up to.<br>
> <br>
> Likely just a convenient place for a second test unit.<br>
> <br>
> In a way this is just an extension of the idea/product
Sun came up wth<br>
> where they put a datacentre in a shipping container with
the idea that<br>
> you could quickly get the datacentre where it was needed.<br>
> <br>
> While I wouldn't say this won't fail, I think there is a
lot of<br>
> attraction to the concept given not just the time lag do
build a<br>
> traditional data centre (mentioned in the article), but
even the cost<br>
> of real estate in many/most places people live these
days. Do you,<br>
> for one example, want to pay NYC rents or just throw a
bunch of pods<br>
> in the Hudson?<br>
> <br>
> I guess once you accept the idea that we no longer
maintain these<br>
> datacentres in the traditional way - we now just let
hardware fail in<br>
> place and ignore it until it's time to replace all the
hardware -<br>
> moving to smaller sealed units doesn't seem to strange.<br>
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</div>
<br clear="all">
<div><br>
</div>
-- <br>
<div dir="ltr" class="m_-239222114683837985gmail_signature" data-smartmail="gmail_signature">
<div dir="ltr">Dr Stuart Midgley<br>
<a href="mailto:sdm900@gmail.com" target="_blank">sdm900@gmail.com</a></div>
</div>
<br>
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