Electrical costs to run a home web server

[techlists at phpcoderusa.com]

I feel for you!!

On 2021-07-21 22:21, Eric Oyen via PLUG-discuss wrote:
> Well, yes and no.
> During the “dry months” it can be a little over efficient. During the
> 110 degree days with less than 5% humidity, it can maintain the place
> at 80-85 degrees. During the monsoon (especially this last week), it
> can be miserable, although cooler than outside. It was over 90 in the
> house today and almost as muggy as any coastal city. With that much
> moister in here, things tend to get sticky and mildew can build up
> rapidly. So, during the cool of the night (if you call 90 outside
> cool), we put it on vent and dry out the house a bit.
> 
> And yeah, all this moister can be hell on computer equipment. Contacts
> tend to corrode, dust starts to become more conductive, etc. Now, if I
> had an ammonia chiller unit here with the condenser coil being
> pre-cooled by the evaporations cooler, we could be dry as a bone in
> here and 80 degrees regardless of outside temp. The reason I specify
> an ammonia chiller, it doesn’t require a compressor to operate (just a
> low value thermal exciter to get the ball rolling) Sure, running an
> extra fan inside to blow air across the coil might take a few extra
> pennies, but the chill during the heat would be more than worth it.
> 
> -Eric
> From the Central Offices of the Technomage Guild, HVAC Dept.
> 
> 
>> On Jul 21, 2021, at 6:50 PM, Keith Smith via PLUG-discuss 
>> <plug-discuss at lists.phxlinux.org> wrote:
>> 
>> 
>> Hi Eric,
>> 
>> I assume you live in the valley? And you use a master cool evaporative 
>> cooler... Off topic question - Does your master cool, cool your house 
>> reasonably in the summer and more so during the monsoons?
>> 
>> 
>> On 2021-07-21 15:50, Eric Oyen via PLUG-discuss wrote:
>>> Back when I ran a home server on my Athlon X2 with 1500 W supply, the
>>> machine never drew that much. Even with several disks spinning, 8
>>> VMWare instances going and a few other goodies, that machine never
>>> drew more than 600w at maximum. I kept it live 24/7 for a few years
>>> and it added less than $120 yearly to the electrical bill. These 
>>> days,
>>> that machine is out of service and is only good for parts. My Mac
>>> mini, which draws at most 100 W under full load is on 24/7 and I 
>>> don’t
>>> even see it add that much to the electrical bill here. There are
>>> really only 3 high draw appliances in this house now:
>>> 1. The refrigerator
>>> 2. The stove/oven
>>> 3. The master cool evaporative cooler. Everything else either runs on
>>> wall warts or only gets used occasionally. In fact, we spend less 
>>> than
>>> $150 a month here for electric. Now, if I put that Athlon X2 back 
>>> into
>>> service, we might see $10 a month in extra use. I am still
>>> contemplating putting it back up and using it as my go to linux
>>> development machine.
>>> -Eric
>>> From the Central Offices of the Technomage Guild, Utilities Dept.
>>>> On Jul 21, 2021, at 7:33 AM, Keith Smith via PLUG-discuss 
>>>> <plug-discuss at lists.phxlinux.org> wrote:
>>>> Hi,
>>>> I just read this quote about the electrical costs to run a web 
>>>> server from home:
>>>> Cost: While it may sound cheaper to use that computer lying around 
>>>> doing nothing when creating your web server, when you factor in the 
>>>> cost of powering an old computer 24 hours a day, it can get very 
>>>> expensive. A 250W desktop computer running 24 hours per day at 12 
>>>> cents per KW/h is a whopping $262.00 per year!
>>>> ---
>>>> I think their math is wrong.
>>>> The average residential electricity rate in Chandler is 10.85¢/kWh.
>>>> I'm thinking a low traffic PHP web server running on an old Dell 
>>>> with a 400 watt power supply is not using but maybe 100 watts on 
>>>> average.  I've read that the computer should use no more than half 
>>>> the power supply capacity.  Is this correct?
>>>> If my home web server is using 100 watts an hour that mean 100 watts 
>>>> * 30 days * 24 hours or 72K watts.
>>>> I'm thinking 72 * .1085 = $7.81 a month.
>>>> Any thoughts are much appreciated.
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