[Bldg-sim] VRF System Modeling - eQUEST
gems at spiritone.com
Thu Aug 14 17:35:03 PDT 2008
Steve Gates is working with Daiken to develop the algorithms and data
necessary to be able to model VRFs in eQUEST. He is also developing a
new eQUEST platform simultaneously and more slowly called the Design Day
platform which will solve many of the perceived "problems" with eQUEST
subroutines. I do not know when the DD platform will be available but I
don't think it will slow him up with respect to developing the VRF
algorithms. They will be added to the existing eQUEST platform. These
algorithms will be available some time early to mid next year.
The EnergyPro algorithms are based on MSA data and were developed by
Tianzen Hong for Martin Dodd. I do not know if there is enough of a
difference between MSA VRFs and Daiken VRFs operation/data that would
make the EnergyPro tool inappropriate for use in analyzing the Daiken
VRFs. Someone else could answer this question. Maybe the Daiken rep
quoted here knows enough about it and using EnergyPro is quite appropriate.
Dan Russell wrote:
> I don't have any experience with this yet, but recognizing that it will
> be necessary for myself in the near future as it is for some, like
> yourself, already I went ahead and asked our local Daikin Rep about
> getting VRF routines incorporated into eQuest. The following is a
> response given today by the Daikin engineering department:
> |...EnergyPro is basically done. The VRVIII units have been added and
> DOE |testing has been performed to verify the results. Martyn Dodd will
> be at |Sawgrass to bring us all up to speed.
> |eQuest as well EnergyPlus are next to tackle and we have already made
> |contact and started working with the software developers. The time
> frame |is middle to end of 2009 for both software packages. eQuest is
> more of a |wildcard because there are some major software changes
> happening on that |platform because of something called the "Design
> Sizing" project which is |very delayed and could end up hurting our
> timeline. I have found in past |that these timelines typically slip so
> please be wary about making any |concrete promises but you have my
> assurance that it is being worked on and |we will eventually (i.e.
> anywhere from 12 months to 30 months) have this |done.
> |If this is a project with immediate LEED implications, I would explore
> |EnergyPro. There is a Daikin specific site on EnergyPro's domain now.
> |Sherwin Khayatian
> |Manager, Western Region
> |Daikin AC (Americas), Inc.
> |Tel: 415-686-3165
> So, at least from the Daikin side it seems that the only sure way to go
> at this time is with EnergyPro. I don't know of a responsive local
> Mitsubishi Rep in my area, but maybe someone out there can ask similar
> question to Mitsubishi regarding their involvement with supporting an
> eQuest-compatible VRF routine.
> Dan Russell, EIT
> -----Original Message-----
> From: bldg-sim-bounces at lists.onebuilding.org
> [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Michael
> Sent: Thursday, July 24, 2008 1:07 PM
> To: Bldg-sim at lists.onebuilding.org
> Subject: [Bldg-sim] VRF System Modeling - eQUEST
> Does anyone know about or have any experience modeling VRF systems in
> eQUEST? Can it be done?
> Does anyone know about the capability of other software packages to
> model VRF systems? Are any of them better than others?
> Michael Bejrowski
> Mechanical EIT - Austin, TX
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