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

Shekhar, Diwanshu diwanshu.shekhar at lmco.com
Thu Jun 3 10:29:54 PDT 2010


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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