Data Center Heat Recovery [EXT]
Steve – some great points. Wish I had the data to help understand them better.
Finding reliable, current data on CPU temperature vs performance is a challenge.
Request – Would greatly appreciate any links to studies that are less than 2 years old, looking at liquid cooled chip performance.
Laws of physics and heat transfer don’t change. “Moores Law” and chip design do change.
Finally, Edge vs Hyperscale
Kind Regards & Keep Safe
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From: main@OCP-All.groups.io <main@OCP-All.groups.io> On Behalf Of Steve Harrington
Sent: Tuesday, May 19, 2020 2:46 PM
Subject: Re: [OCP-All] Data Center Heat Recovery [EXT]
The NREL data center is very efficient. However, when looking at heat recovery, you have to balance the extra power required at higher CPU temperature with the cost of efficient heat pumps. (a one to one comparison of watts of heat to watts of computer power is not appropriate) A hotter running processor may require 5% more power and a typical heat pump has a COP of 4.
This means that if you run your 100 watt processor hotter so it uses 105 watts to get usable heat, and the heat your are replacing requires 25 watts of power to produce 100 watts of heat, the 20 watt power savings for a 100 watts of heat may not justify the expense of hooking the computer to the heating system.
Also, once you hook up a heat source that you can't control to a heating system, you need to have a backup source of heat.
I don't think it makes sense for San Diego, but it might for a place where heat is expensive and the computers are running at full load all of the time.
Steve Harrington, Ph.D
5900 Sea Lion Place, suite 150 Carlsbad CA 92010
On 5/19/2020 12:10 PM, Kevin McCoin via groups.io wrote: