[Equest-users] Can't force pump power to Zero?

[Pasha Korber-Gonzalez]

James.  I would suggest trying 0.0001 for your input.  sometimes DOE2
doesn't like an exact 0 number value, so I typically practice with input
values set at 0.001 or as low as I can input with the value restrictions.

that's what I can offer for now.

Pasha

On Wed, Apr 14, 2010 at 8:56 AM, James Hansen <JHANSEN at ghtltd.com> wrote:

>  I’ve got a fairly simple primary/secondary chilled water system with a
> waterside economizer chiller.
>
>
>
> I’ve already got a secondary chilled water pump circulating primary chilled
> water to the systems in my proposed building, and it does double duty as
> pumping through the heat exchanger in my proposed design.  So the chilled
> water pump that I’ve set up for the waterside economizer (to regulate
> maximum flow) really has Zero power consumption.
>
>
>
> However, when I set the KW to 0.00 for this pump, eQuest is STILL
> auto-sizing something and forcing the KW to around 32 KW.  I even set the
> efficiencies to 1.0 to see if that made a difference (doesn’t).  I’m not
> sure if it has something to do with the warning about the pump not being
> able to match system flow at the minimum required head…but why can’t I force
> this KW to 0??
>
>
>
> Has anyone ever run into this?  Here’s a screenshot of my input for that
> pump and the PV-A output.  Thanks in advance!
>
>
>
> *GHT Limited
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>
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>
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>
>
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