FW: [Radiance-general] modeling hourly daylight illuminance/daylightfactor values for a year

[Ramana Koti]

Hi,

Thanks for the pointers John and Christoph.

I did manage to install DAYSIM and model an office space. When I ran the
simulation I got the 'uncommented lines in the dc file' error which I looked
up in the tutorial and fixed the PATH and RAYPATH environmental variables. I
am using Windows XP on my notebook (the tutorial points these fixes for
Windows 2000, I tried them nevertheless).

I encountered the same error even then. I was trying to fix it and in the
process uninstalled and installed the program 2 to 3 times. Now the program
doesn't start after installation. I can't get it to start despite some
effort. It would help my thesis a lot if I can make it work.

Need your help.

Thanks again,
Ramana.


On 3/27/06, Reinhart, Christoph <Christoph.Reinhart at nrc-cnrc.gc.ca> wrote:
>
> Hi Ramana,
>
> To further convince you that Daylight Coefficients are 'the way to go',
> you can have a look at the attached paper.
>
> Christoph
> Christoph Reinhart, Ph.D.
> Associate Research Officer              National Research Council Canada
> Institute for Research in Construction
> Adjunct Professor                       McGill University
> School of Architecture
> 1200 Montreal Road M-24, Ottawa         Ontario K1A 0R6, Canada
> tel: (613) 993-9703                     fax: (613) 954 3733
> Lightswitch Wizard (initial design)           www.buildwiz.com
> DAYSIM (expert software)                        www.daysim.com
>
> -----Original Message-----
> From: radiance-general-bounces at radiance-online.org
> [mailto:radiance-general-bounces at radiance-online.org] On Behalf Of John
> Mardaljevic
> Sent: Sunday, March 26, 2006 4:57 AM
> To: radiance-general at radiance-online.org
> Subject: [Radiance-general] modeling hourly daylight
> illuminance/daylightfactor values for a year
>
> Ramana,
>
> A brute-force approach (i.e. a new simulation for every hour) can be
> done, but it is computationally very inefficient.  A better approach is
> to use daylight coefficients.  Background, theory and implementation are
> described in chapter 6 here:
> http://www.iesd.dmu.ac.uk/~jm/zxcv-thesis/
> [Web pages seem to be down at the moment - try again later/tomorrow]
>
> An end-user DC version called DAYSIM is available from here:
> http://irc.nrc-cnrc.gc.ca/ie/lighting/daylight/daysim_e.html
> DAYSIM is different in detail from the description noted above, but does
> more or less the same thing.
>
> -John
>
> -----------------------------------------------
> Dr. John Mardaljevic
> Senior Research Fellow
> Institute of Energy and Sustainable Development De Montfort University
> The Gateway Leicester
> LE1 9BH, UK
> +44 (0) 116 257 7972
> +44 (0) 116 257 7981 (fax)
>
> jm at dmu.ac.uk
> http://www.iesd.dmu.ac.uk/~jm
>
>
>
> _______________________________________________
> Radiance-general mailing list
> Radiance-general at radiance-online.org
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>
>
>


--
Venkata Ramana Koti
1137 E Orange St Apt #35
Tempe AZ 85281 USA
Tel: 480.326.9275

MS in Building Design (Energy/Climate)
School of Architecture and Landscape Architecture
College of Design
Arizona State University, Tempe AZ 85287
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