cy's profile - activity

RADIANCE Three-Phase Method - modeling only clear glass Hi everyone, I have a very simple question about the RADIANCE ma

I guess by calibrated you mean obtained with digital camera.... I wasn't aware of ASE metric, thanks for mentioning that

I think that I know what you mean, you refer to the transfer from the sky through the window (daylight matrix), which is

does that mean then that there is no reliable way to predict glare from daylight with the methods currently available? I

Hi all, I'm on the phase of analysing the DGP results obtained with evalglare from annual sample data.

I have two very simple questions about the glare classification method proposed by Wienold:

When evaluating the DGP occurence during the 95% of the working time, is not that clear for me if it should be considered the 'average' or the only the 'maximum' value of that sample.

Then, how to sample the data, should be randomly?

I mean, from a year of 2000 working hours, I should consider a random sample of 100 hours to estimate average DGP during the 5% of the time? Or, can that be selective? Since for instance winter time is more prone to achieve higher glare results.

I'd appreciate your help

Steph

Thank you so much for your recommendations. May I just ask you about your comment on the validity of DGP results: Is the

I wasn't sure how to determine which '95%' of the '100%' of the data to take into account, the maximum DGP value in summ

I wasn't sure how to determine which '95%' of the '100%' of the data to take into account, the maximum DGP value in summ

First, I did my calculations by extracting (from the 100% of the data) the DGP values belonging to each classification (

Sorry about my late reply. In the paper: dynamic daylight glare evaluation (Building simulation conference, 2009), Wieno

about the dynamic glare classification categories Hi all, I'm on the phase of analysing the DGP results obtained with ev

I see, there is influence in the solar distribution but not that significant.. thanks a lot!

I wonder how Energy Plus handles the lighting redirections through the BSDF data (for thermal calculation), I don't see huge difference when comparing results, but I'd like to know how different is the calculation performed when using the BSDF data [0009] (Matrix Two Dimensions) with the 145x145 data...than when carrying out the calculation using only the Visible and Solar Transmittance and Reflectance data by adding a new glazing system in Open Studio ([0007] Window Material Glazing).. where reflectance data and transmittance are specified at normal incidence. I'd appreciate your reply.Steph

Hi, may I ask you something regarding your answer in this question: "Everything that goes through BSDF window in EnergyPlus will hit some surface and then will be bounced as perfectly diffuse".

Thank you so much! Yep, pretty much answered the crucial part of my question...thanks again! S.

Hi all, I'd like to confirm some information that I 'collected' from different posts in this forum, regarding annual glare and daylight predictions.

-Annual Glare cannot be simulated 'alone' using Energy Plus, is calculated through Open Studio-Radiance

-This is done using the glazing material created within Open Studio, the use of BSDF data from Window 7 is not yet implemented in Open Studio

-If the BSDF data cannot be used in Open Studio-Radiance; but it is possible to use it in Energy Plus, what method is used to carry-out daylight simulations in Energy Plus? And how approximate are those results to those obtained with Radiance?

-The use of user-defined BSDF would be implemented sometime soon in Open Studio, at the moment only venetian blinds can be simulated: are those included in a database? or how can such system be tested?

I'd highly appreciate your help.

Steph

Thank you so much for your time and help...! :) Steph

Thank you so much for your answer!

May I ask two more questions, 1) Annual glare can be then calculated using glazing systems (xml files) obtained from Window 7? 2) is it possible to know since when this feature (annual glare calculation) is available in Open Studio? Meaning the year or the version of the software? I would like to include this information in my report.

I thank you in advance!

Sth

Hi guys

I'm coming here to ask about the output of glare simulations using Open Studio/Energy Plus. It is possible to obtain an annual calcuation, sort of an annual glare map of glare?

I have some problems to run simulations using the latest version of Open Studio & Energy Plus with the computer that I'm using now, so I cannot really test this now. I hope that somebody can give me a hint while I fix this problem. I thank you in advance Steph