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Posted by geoman on July 16, 2006, 7:12 pm
> geoman wrote:
>> Lights for Manual J. I'm not confident with the old stand by 2 watss per
>> ft2 since the new electronic fixtures. And computors have changed a great
>> deal. What is everyone using for these BTU gains in J?
>>
>> The new style floresents four bulb suspended ceiling fixtures, what is
>> appropriate to use for BTU gain?
>>
>> Computors. Changing all the time.
>>
>> Desktop BTU with CTR btu output?
>>
>> Desktop BTU with LCD Screen output?
>>
>> Laptop BTU output?
>>
>>
>> Thanks
>>
>> Rich
>>
>>
>
> Rich,
>
> The manufacturers of lighting all publish the BTU output these days, as I
> remember. We're using Cooper lighting in our new building and I know they
> were able to provide the data.
>
> We've seen severe disproportional heat loading in office environments
> directly related to copiers and laser printers. Abby was right... these
> need a real close look. Lexmark has some data out there on lasers... I
> don't know if I've ever seen any on copiers.
>
> AMD has some pretty good data on CPU cooling, as I remember. AMD's run hot
> so their info would be conservative for Intel machines (I'm told).
>
> My gut feeling is that in a one-person-per-office scenario, standard LCD's
> and workstations don't present a huge problem. Start stacking them
> together and it's a nightmare. I've seen it.
>
> No one likes to deliberately oversize systems... but it would be nice if
> just a little planning was done prior to installation. You're doing the
> customer right by asking these questions.
>
> Case-in-point: We recently were working a controls project at a major
> order-taking/distribution site in the Indianapolis area. The building had
> a huge open area that was the 'order-taking' bull-pen... so to speak. A
> consultant decided that 'associates' could be more 'productive' if
> printers were placed in numerous strategic locations throughout the maze
> of cube workstations. That way... they didn't have to run half-way across
> the building to get print-outs (which they need only occasionally).
>
> They didn't ask anyone but their network people if this was a problem. For
> the network... it was not. But going from 2 to 16 laser printers took it's
> toll on the HVAC system in a 100 x 40 zoned space. The cooling couldn't
> keep up. There was no 'magic' controls fix.
>
> They had to upgrade the system.. which was expensive post-construction.
>
> I know we're all very focused on energy savings these days.. which is what
> VS and multi-stage systems are all about. It is my own opinion that
> designing for a 20% (or more) increase in load is not a bad idea these the
> way things change so quickly.
>
> After all, the systems can be somewhat 'scalable' to demand.
>
> Jake
Wow, between all these great posts and email I'm getting an adrenalin buzz!
I can see the problem you had with those extra printers, that would really
upset the cart.
This one job is pretty simple, but I know the guy that designed the prints,
hes a 110% idiot that needs to be shown to the rest of the community.
The existing building was a grocery store and they are making three equally
divided offices in the building. The original building had NO insulation
anywhere and had TONS of the old type ballast 8 foot lights and a 120,000
btu furnace and 4 ton AC worked exceptionally well.
. The building was gutted and it went from 8" Bare block walls to R-23 walls
and r44 ceiling. and insulated glass and real doors verses those leaking
automatic doors. Now the prints say they need 14 tons of AC and 490,000
BTU's of heat!!! See why I want this right. Being so small I could fudge
it by a half ton in each unit but I know its going to be asked about the
extra loads.
Thanks
Rich
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