[Bldg-sim] Model validation protocol

[Jeff Haberl]

FYI...



I think either Prof. Spitler or Fisher at OSU Mechanical Engineering can help with this based on their previous ASHRAE projects.



Jeff



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Jeff S. Haberl, Ph.D.,P.E., FASHRAE..............jhaberl at tamu.edu

Professor............................................................Office Ph: 979-845-6507

Department of Architecture.............................Lab Ph:979-845-6065

Energy Systems Laboratory.............................FAX: 979-862-2457

Texas A&M University.....................................77843-3581

College Station, Texas, USA, 77843..................URL:www.esl.tamu.edu

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________________________________
From: bldg-sim-bounces at lists.onebuilding.org [bldg-sim-bounces at lists.onebuilding.org] on behalf of Joel Neymark [neymarkj at msn.com]
Sent: Wednesday, March 28, 2012 8:45 AM
To: Sachin Sharma; 'bldg-sim at lists.onebuilding.org'
Subject: Re: [Bldg-sim] Model validation protocol

Sachin,

For building energy simulation programs validation protocols are like professional registration exams, you can only do a limited number of previously addressed/"solved" specific problems to "prove" competency to qualify to practice (and then subsequently step off the "academic" platform and into the larger world -- and do your best). Having said that, we are striving to take validation as far as we can.

I recommend the following as a starting point for studying validation methodology; and you can search on the authors at the "NREL publications data base" for more recent material.

http://www.nrel.gov/docs/fy06osti/40360.pdf

Also, an IEA research task had a study a while back relating to validating radiant system modeling

http://www.iea-shc.org/publications/downloads/RADTEST_final.pdf

Best,
joel

Joel Neymark, P.E.
J. Neymark & Associates
Tel: (1) 303 384 3672

From: Sachin Sharma<mailto:sachin5787 at gmail.com>
Sent: Wednesday, March 28, 2012 6:18 AM
To: 'bldg-sim at lists.onebuilding.org'<mailto:'bldg-sim at lists.onebuilding.org'>
Subject: [Bldg-sim] Model validation protocol

Hi,

This requires input from masters of energy modelling, so plz give suggestions!

I have modelled a test chamber with radiant floor cooling system + OA ventilation using EnergyPlus. The model has been prepared as per the specification of a published paper of a renowned Journal. The experimental data of the test chamber as given in the paper has been matched with my energyplus results. So, here are my queries:

1. Will this be considered as validation of the methodology used in the software and now I can make changes in not only the HVAC system but also in the building envelope as well. My concern is that, by changing the building envelope and HVAC system do the results of my model be considered as validated or not. Can anyone share the model result validation protocol.

2. If I put DOAS in the same model with same envelope details and compare it with other cooling systems for a particular climate does the model results be considered as validated or not. In other words, can I make changes in the HVAC system keeping envelope, schedules and other loads similar to the original data and consider my model results to be validated or not.

In many cases what I have seen is that the models are validated using experimental data but what if there is no experimental setup available, then will this approach of using a published data from previous experiment to validate your own modelling approach and then making desired parametric changes to find results suffice or not?

Thanks,

With regards,

Sachin Sharma, GRIHA T&E
M.Tech Energy Engg.
Department of Mechanical Engineering
NIT Jaipur
+91 9983912512


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