[Bldg-sim] Parametric analysis/modeling and Live analysis/modeling

[Shekhar, Diwanshu]

I believe my take away is: Modeling of an existing building where you can verify against actual
performance is referred to as "Live Modeling" (as explained by b.fountain). Parametric modeling has to do with when you change one or more parameters in your model , basically for comparison between the baseline and the proposed model. When one is performing a parametric analysis, the baseline model doesn't necessarily has to match with the actual building. Having said that, parametric analysis should be common in new constructions or sensitivity analysis of parameters(example of window glazing provided by Andy and Solar heat gain coefficient provided by Haider). Additionally, live analysis should be helpful when one is performing an energy analysis of an existing construction.
Please correct me if I am missing anything. 
-Diwanshu
-----Original Message-----
From: B. Fountain [mailto:bfountain at greensim.com] 
Sent: Thursday, June 03, 2010 11:21 AM
To: Shekhar, Diwanshu
Subject: Re: [Bldg-sim] Parametric analysis/modeling and Live analysis/modeling

"Live modelling" is not as clearly defined.  I can think of 2 contexts for
live modelling --

1) where you take a preliminary model into a Charrette type enviroment
with the design team and then dynamically update and run the model as the
design team brainstorms to show the impact of various design options. 
(usually stressful and fun)

2) modelling of an existing building where you can verify against actual
performance and further you can populate the model with "live" building
data.



> Andy and Haider,
> This makes a lot of sense now. Thanks to both of you. Now, I am wondering
> about the live modeling. What is it and how is it different from the
> parametric runs? Thanks much,
> -Diwanshu
>
> From: Andy Tindale [mailto:Andy at designbuilder.co.uk]
> Sent: Thursday, June 03, 2010 12:54 AM
> To: Shekhar, Diwanshu
> Cc: bldg-sim at lists.onebuilding.org
> Subject: RE: [Bldg-sim] Parametric analysis/modeling and Live
> analysis/modeling
>
> Hi Diwanshu,
>
> Just to expand on Haider's message, parametric analysis is applied to a
> base building design to see the effect of changing (usually one or 2)
> design parameters on a particular performance variable. The results are
> plotted as a curve or a series of curves to illustrate the variation
> graphically. For example, you might be interested to know the effect on
> building carbon emissions of varying the amount of glazing in the building
> and you might want to know this for 3 different types of glazing. The
> graph below was generated by DesignBuilder using the EnergyPlus simulation
> engine by selecting the parameters to vary. Because glazing provides both
> benefits (heat in winter and light) and penalties (cooling load),
> parametric analysis can give useful insights into the relationship between
> the design parameters and a chosen performance parameter (annual carbon
> emissions in this case). In the example graph below there is a minimum
> carbon emissions at just below 80% glazing and this might help guide an
> architect at early stages of the design process towards a basic optimised
> configuration.
>
> Andy
>
> [cid:image001.jpg at 01CB0307.B50B6B70]
>
> From: bldg-sim-bounces at lists.onebuilding.org
> [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Haider
> Sent: 03 June 2010 01:30
> To: Shekhar, Diwanshu
> Cc: bldg-sim at lists.onebuilding.org
> Subject: Re: [Bldg-sim] Parametric analysis/modeling and Live
> analysis/modeling
>
> Hi Diwanshu,
>
> Since you are posting to this group I am going to give an example related
> to buildings. Let me start with modeling. You can mathematically model the
> physic of heat transfer in a building. This is generally referred to as
> modeling. The advantage of this is that you can simulate the heat transfer
> in the building without actually have to build it or build a scale model.
> The inputs of the building model such as window solar heat gain
> coefficient etc. can be varied within some constraints to determine the
> disadvantage/advantage of that on the building energy consumption thereby
> optimizing the building to consume the least amount of energy. The varying
> of window solar heat coefficient in the above example would be referred to
> as parametric analysis. This is a simplistic yet time consuming
> methodology of optimizing the building energy efficiency feature.
>
> Hope this helps.
>
> Haider Khan.
> ICF International.
>
> On Jun 2, 2010, at 1:01 PM, "Shekhar, Diwanshu"
> <diwanshu.shekhar at lmco.com<mailto:diwanshu.shekhar at lmco.com>> wrote:
> Hello all,
> I am having a hard time understanding the concept of parametric
> analysis/modeling and Live analysis/modeling. I am sorry to say that
> Google is not very helpful here. I would appreciate if anybody here would
> explain these concepts to me. Thanks in advance.
>
> DS
>
>
> Diwanshu Shekhar
> Project Engineer
>
> Energy Trust of Oregon
> Business Energy Solutions
> Lockheed Martin
> 621 SW Morrison Street, Suite 550
> Portland, Oregon 97205
>
> 503.278.3007 DIRECT
> 503.243.1154 FAX
> energytrust.org<http://www.energytrust.org/>
>
> + Please consider the environment before printing this email.
>
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