[Bldg-sim] One model

[CARNEY Ronan]

Actually, I'm utilising IES to do HVAC design, Energy Analysis, PMV
calc, lighting lux design, lighting power intensity design and natural
daylight analysis all in line with the Australian Standards and Green
Star (another form of LEED) requirements. 
 
Although the software costs money, I've found it to be worthwhile
battling against it's flaws and it gives us the results which we
require. 
 
Please note, this is a one model approach. It's easy to start a project
at CD (concept design) stage within Google Sketchup and to utilise the
freeware version of IES to do alternate design analysis. However, it's
way better if the full suite is purchases and the model is crossed over
into IES. Within IES multiple analysis and detailed designs can be
modelled quickly and with fantastic final project results. I know, I've
done it.
 
Also with the daylight analysis, if you've got a detailed building with
over 100000 surfaces, it's going to take forever to do the analysis,
that's my only issue with the software. However, the software is
developing multithreading facility within it's software, therefore
decreasing the time for analysis dramatically.
 
Should anyone want to discuss my approaches further, and are in
Brisbane, I welcome the opportunity to meet and greet with you.

Regards,
Ronan Carney
Electrical Engineer
Project Services
*Level 5B 80 George St Brisbane
*Ph: (07) 3224 5983
*Fax: (07) 3224 6151
*Email: Ronan.Carney at projectservices.qld.gov.au
<mailto:Ronan.Carney at projectservices.qld.gov.au>  


________________________________

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Rob
Guglielmetti
Sent: Thursday, 12 March 2009 1:12 PM
To: Ross Harding
Cc: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] One model



On Mar 11, 2009, at 6:09 PM, Ross Harding wrote:


	
	The ultimate goal for us would be to use one model for daylight
and energy models, but I haven't found that quite that simple as most
software requires varying drawing techniques.


Amen brother!  Another issue is that while the energy model has to
include the total building -- all spaces and systems -- to be a complete
picture of the energy use, a Radiance-based daylight model does not
necessarily require all the spaces to be modeled simultaneously.
Indeed, the accuracy of the ambient calculation is directly affected by
the maximum size of the scene, and so conducting a simultaneous daylight
simulation of an entire building at an acceptably rigorous ambient
resolution can be -- is generally -- time-prohibitive.

As mentioned in a recent thread on this list, Thomas Bleicher's "su2rad"
plugin for SketchUp can export a SU model to Radiance format and there
is also an E+ plugin to allow one to use the same SU model for E+
analysis; in theory, these three components (SketchUp, su2rad and the E+
plugin) allow for a "single model" approach to energy and daylight
modeling. However, because the su2rad exporter wants to take the entire
model and create a single Radiance scene description, that creates the
aforementioned problem of the ambient calculation getting out of hand
fairly quickly.  I suppose through intelligent layering and model
structuring, one could create a model that could be exported to Radiance
in "space components", but I'm not sure if this is compatible with the
E+ plugin's layering/model organization requirements.

- Rob Guglielmetti

***************************** Disclaimer *****************************

The contents of this electronic message and any attachments are intended only for the addressee and may contain privileged or confidential information. They may only be used for the purposes for which they were supplied. If you are not the addressee, you are notified that any transmission, distribution, downloading, printing or photocopying of the contents of this message or attachments is strictly prohibited. The privilege of confidentiality attached to this message and attachments is not waived, lost or destroyed by reason of mistaken delivery to you. If you receive this message in error please notify the sender by return e-mail or telephone.

Please note: the Department of Public Works carries out automatic
software scanning, filtering and blocking of E-mails and attachments (including emails of a
personal nature) for detection of viruses, malicious code, SPAM, executable programs or content it deems
unacceptable. All reasonable precautions will be taken to respect the privacy of
individuals as outlined in the DPW Privacy Plan. Personal information will only be used for official
purposes, e.g. monitoring Departmental Personnel's compliance with Departmental Policies.
Personal information will not be divulged or disclosed to others, unless as required by Departmental
Policy and/or State or Commonwealth Law.

Thank you.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20090312/ba83f811/attachment-0002.htm>