[Equest-users] [Bldg-sim] VRF performance curve

Qureshi, Harris Harris.Qureshi at stantec.com
Wed May 27 07:18:02 PDT 2015


Hi Rathna,

What software are you using ? You might want to go through the attached modelling protocol attached from LG as Sherif mentions .

Harris

Harris Qureshi, B.E(Mech), MSc. Energy, LEED AP Homes
Mechanical Engineer
Stantec
Dubai Investment Park, PO Box 52764 Dubai UAE
Phone: +971-4-812-5947
Cell: +971-50-189-9924
Harris.Qureshi at stantec.com<mailto:Harris.Qureshi at stantec.com>

[http://www.stantec.com/content/dam/stantec/images/esignature/stantec.png]<http://www.stantec.com/>



The content of this email is the confidential property of Stantec and should not be copied, modified, retransmitted, or used for any purpose except with Stantec's written authorization. If you are not the intended recipient, please delete all copies and notify us immediately.

ü Please consider the environment before printing this email.
From: Bldg-sim [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Sherif Farag
Sent: Wednesday, May 27, 2015 5:26 PM
To: Rathna Shree
Cc: BldgSim Mailing List; equest-users at onebuilding.org<mailto:equest-users at onebuilding.org>
Subject: Re: [Bldg-sim] VRF performance curve

Hi Rathna,
LG has a plug-in that works good with eQuest, I tried it and I noticed the % of energy saving will be on the region of 20% when compared to PTAC (Not compared to the App G. Baseline).
Thanks;
Sherif Farag
Technical Director
Integrated Environmental Services (IES) Ltd.
Abu Dhabi - UAE

On May 27, 2015, at 11:18 AM, Rathna Shree <rathnashreep at yahoo.in<mailto:rathnashreep at yahoo.in>> wrote:

Dear All,

I worked on a couple of projects in equest  using the VRF performance curves from Daikin and LG. The methodology i followed is as below:

1) Modelled packaged VAV with minimum flow ratio 1.
2) Created systems based on number of ODU's and assigned multiple zones to the respective ODU. (Just like modelling a AHU)
3) Inputted the ODU Cooling capacity and supply flow
4) Fans will be constant volume.
5) Since it is a cooling only system, i assigned only the "Cool EIR - fEWB-OAT", "Cool-EIR-fPLR" and "Cool cap-fEWB&OAT" curves. Rest were all default DX unit curves.

 PVAV system is used as PSZ system cannot handle multiple zones well thus causing unmet hours.

I did 2 trials, one with default DX curves and the other with performance curves from LG and Daikin. The results showed a decrease in cooling energy consumption by more than 30% thus impacting the overall energy consumption by more than 10%.

Is the simulation methodology and results appropriate? I feel the savings is on a higher side.

Please advise.

Regards,
Rathnashree
_______________________________________________
Bldg-sim mailing list
http://lists.onebuilding.org/listinfo.cgi/bldg-sim-onebuilding.org
To unsubscribe from this mailing list send  a blank message to BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG<mailto:BLDG-SIM-UNSUBSCRIBE at ONEBUILDING.ORG>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20150527/dd15b5c2/attachment-0005.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: VRF-TG-BK-001-US-012G03_eQUEST_Building_Energy_Modeling_Guide_for_LG Multi_V_20120703095059.pdf
Type: application/pdf
Size: 1064513 bytes
Desc: VRF-TG-BK-001-US-012G03_eQUEST_Building_Energy_Modeling_Guide_for_LG Multi_V_20120703095059.pdf
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20150527/dd15b5c2/attachment-0005.pdf>


More information about the Equest-users mailing list