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Today's Topics:
1. Re: [outages] Equinix CH1 Overheating (Clayton Zekelman)
2. Re: [outages] Equinix CH1 Overheating (Chris Adams)
3. Re: [outages] Equinix CH1 Overheating (Josh Luthman)
4. Re: [outages] Equinix CH1 Overheating (Michael B. Williams)
----------------------------------------------------------------------
Message: 1
Date: Mon, 15 Jan 2024 15:35:23 -0500
From: Clayton Zekelman <clay...@mnsi.net>
To: David Eddleman
<david.eddle...@gmail.com>,outages-discussion@outages.org
Subject: Re: [Outages-discussion] [outages] Equinix CH1 Overheating
Message-ID: <1705350922_167...@surgemail.mnsi.net>
Content-Type: text/plain; charset="us-ascii"; Format="flowed"
At 03:07 PM 2024-01-15, David Eddleman via Outages-discussion wrote:
>"Reuse the ducting" doesn't work well. The cold air has to be blown
>to specific rows for the datacenter to work. Remember hot row, cold
>row. Racks of servers make great windbreaks since they're giant
>blocks, blocking any blowing air, so the cold air has to come in via
>the cold row ducting to be effective. Simply opening the doors and
>bringing fans in only slightly reduces the ambient temperatures, but
>it doesn't get cold air where it needs to go, as heat simply flows
>in the direction of least resistance to fill a void. Plus depending
>upon the failure within the chiller system the whole system may shut
>down to prevent the system from eating itself during a malfunction.
>Even though the heat exchanger isn't working, the blower motors may
>have a physical disconnect in the event of said event. Residential
>HVAC systems have safeties that can disconnect the whole system in
>the event condensation drains are clogged, for example.
>
>Datacenters in Greenland have other problems as well, despite being
>in an arctic environment for many parts of the year. Snow is
>actually a fantastic insulator, so you still need HVAC even when the
>environment is seriously cold outside. You need a way to pump cold
>air in and hot air out.
>
When we build a facility, the design we use has a mixing chamber
where the cold air supply from the internal air handler returns can
be combined with filtered outside air. We use actuators to control
the dampers, and a variable speed fan wall with one way louvers to
draw the air in. We also use humidity sensors to make sure we're not
introducing too much humidity or drying the air out too much. In the
facilities where we did install humidifiers, we never have ended up
needing them (must be due to our climate). We have pressure relief
vents with weighted louvers to exhaust any excess air that we draw in
when in free cooling mode. It seems to work well, and we track all
the state info on our BMS to make sure nothing gets out of
whack. The whole setup saves us a bunch on electricity, as we almost
never use mechanical cooling in the winter months.
--
Clayton Zekelman
Managed Network Systems Inc. (MNSi)
3363 Tecumseh Rd. E
Windsor, Ontario
N8W 1H4
tel. 519-985-8410
fax. 519-985-8409
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Message: 2
Date: Mon, 15 Jan 2024 20:12:30 -0600
From: Chris Adams <c...@cmadams.net>
To: outages-discussion@outages.org
Subject: Re: [Outages-discussion] [outages] Equinix CH1 Overheating
Message-ID: <20240116021230.ga25...@cmadams.net>
Content-Type: text/plain; charset=us-ascii
Once upon a time, Josh Luthman <j...@imaginenetworksllc.com> said:
> The same ductwork that the chillers/compressors are using could be utilized
> by outside cold air. You will have to have a second fan, filter, etc. yes.
In at least some places, there is not much ductwork - the chillers are
connected to air handlers at the end of the row, blowing down the aisle.
I haven't been to 350 Cermak (we had equipment there but on another
floor, and I never visited there anyway), so don't know the setup.
--
Chris Adams <c...@cmadams.net>
------------------------------
Message: 3
Date: Mon, 15 Jan 2024 21:18:22 -0500
From: Josh Luthman <j...@imaginenetworksllc.com>
To: Chris Adams <c...@cmadams.net>, outages-discussion@outages.org
Subject: Re: [Outages-discussion] [outages] Equinix CH1 Overheating
Message-ID:
<CAN9qwJ9f4GPvCL-3iPvQv-NhrvXv3pAK5=t0hz9g+bp+lxw...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
In the context where they are just blowing down the aisle, one duct from
outside to that aisle would be an alternative.
In the context where there are "better" paths for air to travel, use the
existing ductwork.
On Mon, Jan 15, 2024 at 9:13?PM Chris Adams via Outages-discussion <
outages-discussion@outages.org> wrote:
> Once upon a time, Josh Luthman <j...@imaginenetworksllc.com> said:
> > The same ductwork that the chillers/compressors are using could be
> utilized
> > by outside cold air. You will have to have a second fan, filter, etc.
> yes.
>
> In at least some places, there is not much ductwork - the chillers are
> connected to air handlers at the end of the row, blowing down the aisle.
> I haven't been to 350 Cermak (we had equipment there but on another
> floor, and I never visited there anyway), so don't know the setup.
>
> --
> Chris Adams <c...@cmadams.net>
> _______________________________________________
> Outages-discussion mailing list
> Outages-discussion@outages.org
> https://puck.nether.net/mailman/listinfo/outages-discussion
>
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Message: 4
Date: Tue, 16 Jan 2024 02:32:11 +0000
From: "Michael B. Williams" <michael.willi...@glexia.com>
To: Josh Luthman <j...@imaginenetworksllc.com>
Cc: Chris Adams <c...@cmadams.net>, outages-discussion@outages.org
Subject: Re: [Outages-discussion] [outages] Equinix CH1 Overheating
Message-ID: <8fbfee84-2e12-494c-5e26-759f04501...@glexia.com>
Content-Type: text/plain; charset="utf-8"
In these circumstances, all I can say is fuqqq.
[data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=3D]
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