Model validation protocol

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

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?


With regards,

Sachin Sharma, GRIHA T&E

Sachin Sharma's picture
Joined: 2011-09-30
Reputation: 0


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.

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


Joel Neymark, P.E.

Joel Neymark's picture
Joined: 2011-10-02
Reputation: 0


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

Jeff S. Haberl, Ph.D.,P.E., FASHRAE

Jeff Haberl2's picture
Joined: 2011-10-02
Reputation: 200