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RE: [EnergyPlus_Support] DX Coils
Mike,
I
using three sizes in this particular building, 7.5, 8.5 and 12 ton
(nominal). I have put together the other four performace curves for DX
coil from MFG performace tables for many systems (these are actually
Carrier 48TM's and 48HJ's). But so far I haven't been able to get data for
computing Part Load curves (Do MFG's not want to put this data out for
some reason?)
I
would like to get your curve for a 9.5 ton. What I am using now is a
linear "curve" from DOE2 (Thanks to J. Trowbridge! ) of PLF = 0.7 + 0.3(PLR).
Brent
We have developed a PLF
curve for a 9.5 ton unit which we could
share, but it sounds like you're
looking for something larger. The
manufacturer should be willing to
provide you with this. What size
range are you looking
at?
Mike
On 22 Oct 2002, at 11:35, Griffith, Brent
wrote:
> Greetings,
>
> RE: input for
Coil:DX:CoolingBypassFactorEmpirical
>
> Has anyone generated
Part Load Fraction Correlation functions for
> larger industrial rooftop
package units? It seems difficult to get
> part load data for
specific models. All I have been able to come up
> with is
to generate a suitable cubic from the Part_Load Factor Curve
> provided
as Figure 1. in ARI Standard 340/360-2000. This seems to
> work
but I am not sure if this is the way to go since it often goes
> way
below the E+ limit of 0.7. Also I can't seem to push the SHR
>
higher than 0.75 which is less than what is indicated by the equipment
>
specs I am using.
>
> Any ideas? Thanks in
advance.
>
> Brent Griffith
>
>
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