[Equest-users] Daikin heat pump curves

[Sambhav Tiwari]

These curves are same for all HP units how is it possible

Regards
Sambhav

On Thu, Jul 17, 2014 at 4:45 AM, Julien Marrec <julien.marrec at gmail.com>
wrote:

> Hi,
>
> I've been trying to model a Daikin VRV system and trying to figure out why
> I was getting 100 times more space heating in the proposed (VRV) model
> compared to the baseline model (PTHP). After isolating the problem to the
> VRV, I found a conversation from March 2014 between a few folks (Byron
> Burns and Bill Bishop mostly - thank you both!), that basically explained
> why I was getting the issue: the .inp data from Daikin isn't importing
> correctly.
>
> I just wanted to say that we're in July now, and this still hasn't been
> fixed (I downloaded the curve from Daikin a few days ago), so if you're
> having the problem, the fix proposed by Byron and Bill still works. It
> consists in to replacing the VRV Heating Curve with:
>
> "VRV Heating EIR-F-EWB/ODB AC" = CURVE-FIT
>    TYPE             = BI-QUADRATIC-T
>    INPUT-TYPE       = COEFFICIENTS
>    COEFFICIENTS     = ( -1.85025, 0.0620141, -0.000312822, 0.07145853,
>          -0.0003626328, -0.0007776424 )
>    ..
>
> (at least that's how I understood it and it seems to be working).
>
> I've attached the performance curves with repaired Heating EIR for VRV.
>
> I'll email Daikin to let them know (again), maybe others will want to do
> the same so that they realize this is a problem encountered by more than
> one individual
>
>
> Have a great day,
> Julien
> --
> Julien Marrec, EBCP, BPI MFBA
> Energy&Sustainability Engineer
> T: +33 6 95 14 42 13
>
> LinkedIn (en) : www.linkedin.com/in/julienmarrec
>
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