[Bldg-sim] eQuest & Mitsubishi VRF systems

Chris Jones cj at cr-jay.ca
Tue Apr 8 06:49:22 PDT 2008


Thanks for your response.  I will check with the VisualDOE folks to 
find out if there that is a viable option at this point.

At 18:37 2008-04-02, Brandon Nichols wrote:
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>All,
>
>It is my understanding that Mitsubishi and Daikan funded development 
>of DOE2 VRF routines that run under EnergyPro and VisualDOE using 
>DOE2.1E, and there may be some 
><http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/2007-August/006284.html>problematic 
>challenges hindering simple implementation in eQuest.
>.
>Will see if I can elicit comment on this topic from eQuest's 
>dynamic, talented and decidedly underappreciated developers, who 
>tirelessly toil day and night on our behalf.  Perhaps we can show 
>our appreciation for them by all lobbying our local Mitsubishi / 
>Daikan reps to secure funding for a port-to-eQuest effort.  After 
>all, updating to eQuest it seems would be in the manufacture's best 
>interests, with usage of variable refrigerant flow systems gaining 
>traction in the marketplace.
>
>As a short-term workaround, am following up on a rumor that there 
>may be a way for an eQuest parametric run to be manually edited to 
>reference these routines, provided they can be obtained.  Will also 
>see what I can do about actually obtaining them.  This isn't a 
>purely altruistic gesture, I too am working on a VRF system.
>
>More information forthcoming, hopefully...
>
>Brandon Nichols, PE,  LEED AP
>Mechanical
>HARGIS ENGINEERS
>600 Stewart St
>Suite 1000
>Seattle, WA 98101
>d | 206.436.0400 c | 206.228.8707
>o | 206.448.3376 f | 206.448.4450
><http://www.hargis.biz>www.hargis.biz
>
>
>----------
>From: bldg-sim-bounces at lists.onebuilding.org 
>[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Haider Khan
>Sent: Tuesday, April 01, 2008 10:09 AM
>To: Chris Jones
>Cc: bldg-sim at lists.onebuilding.org
>Subject: Re: [Bldg-sim] Mitsubishi VFR systems
>
>As far as I know you cannot do it in DOE2 directly, but a quasi DOE2 
>approach would be to calculate the hourly system loads using DOE2 
>and calculate VRV energy consumption using spreadsheet calculations. 
>You will have to create a regression based model to calculate the 
>energy consumption as a function of the capacity and outdoor air 
>temperature (The data is available on Mr. Slim website). Once you 
>are sure the model is working correctly (be sure to put limits on 
>your equations for out of range data) you can use the hourly weather 
>boundary conditions to calculate the annual energy consumption.
>
>If  you are doing code compliance using eQUEST you can calculate the 
>average calibrated EER using the above methodology and use it as a DOE2 input.
>
>Best Regards,
>Haider M. Khan, MSME
>
>ICF International
>9300 Lee Highway,
>Fairfax, VA 22031
>Ph:  703 934-3868
>Fax: 703 934-3530
>
>
>
>On Fri, Mar 28, 2008 at 12:08 PM, Chris Jones 
><<mailto:cj at cr-jay.ca>cj at cr-jay.ca> wrote:
>I am presented with the task of modelling a small commercial building
>with the Mitsubishi variable flow refrigerant system - heat
>pumps.  Does anyone have any hints for approximating this system in
>DOE2.1e or equest?
>
>
>
>Chris Jones, P.Eng.
>14 Oneida Avenue
>Toronto, ON M5J2E3
>Tel. 416 203-7465
>Fax. 416 946-1005
>
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Chris Jones, P.Eng.
14 Oneida Avenue
Toronto, ON M5J2E3
Tel. 416 203-7465
Fax. 416 946-1005 
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