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Re: [EnergyPlus_Support] about the intrnal heat gain from computers
Hi
I also have faced the same kind of problem of calculating building
internal heat sources specially for computers and monitors.
Electricity Consumtions of computers and monitors varies from model to
model. In ASHRAE Handbook , the range is given only but difficult to
take the appropriate one for the use.
For my experiment, i tested one pentium-4 computer and a monitor by
KWh meter. And i got around 120W has been consumed by the KWh meter.
But i am not sure about the ratio of electricity consumtion and the
heat generation.
Thanks
On Fri, 7 Jan 2005 15:37:35 -0800 (PST), zhen tian <tianzhen9@xxxxxxxxx> wrote:
>
> Hi, All:
>
> I almost finish my simulation and very appreciate the help from Mike and many other expers in EnergyPlus group.
>
> Now I am checking the input in my model. I have a question about the internal heat gain from "Electric Equipment". I know that typical office work and the inpin the Occupancy heat gain is about 100-130W/person for ut for "lighting design level" can be the calculation of lighting fixtures. But I am not sure about the Electric Equipment.
>
> Although referring to some standard, I can use 10W/m2 for the office space. But right now I want to use the actual value for this. Some days ago, there are some poster for discussing the computer heat production. If the enegy consumption for a PC (including monitor) is about 300W, and there are only 2 computers in a zone. So the input value for this zone is 600W in the Electric Equipment Design Level. Is this method correct?
>
> Although this may be correct for calculation of electrity use of a space, is it correct for the actual heat production? If all the 600W electricity consumed will be turned into heat production in the space? If not, what ratio will become heat? And if a PC is in a standby conidtion, what will be the reasonable range for energy consumption and heat production? Could sombody give me some reference or data?
>
> Thanks a lot.
>
> Regards,
>
> Zhen
>
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