You are welcome. Please see the following link for Glare index output: bigladdersoftware.com/epx/docs/8-9/input-output-reference/output-table-summaryreports.html#daylightingreportmonthly
Hello. Thank you for your good training. I had a question about DesignBuilder, if possible, please answer. From another software, I calculated the ambient temperature for one hour on a specific day in a street and modeled this street in DesignBuilder. Now I want to enter this temperature manually for this street and get energy analysis from DesignBuilder. Is this possible in DesignBuilder software?
Hi, Thank you for the question. As far as I know, such calculations are not feasible in the DesignBuilder. Such urban morphological/outdoor simulation is possible in EnviMet. But then again, the building's internal energy analysis will not be possible in EnviMet. I hope that answers your question.
Hi! Thanks for the tutorial. I'm using v7 of DesignBuilder and I don't see the export energy plus input file simulation option. Do you know where can I get the illuminance input file?
Hi! Usually, if the software is not licenced, then the export option does not appear. In the case of illuminance input, as far as I know, you do not need to input any file. In DB, the lighting controls that you need to input for the simulation. I hope that helps.
Thanks a lot for this tutorial. By the way, the illuminance values you obtain at the end on the Excel sheet, are they supposed to change if we change the glazing type in the DesignBuilder model ?
I follow you procedure in order to study illuminance in a one-window room for several glazing solutions. At the end, I always have the same illuminance values, independantly of the glazing type, the weather file or the sky conditions. However, the illuminance changes well when I change the dimensions of the openings (for example, illuminance reduces when I reduce the window size). Would you have an idea were my errors come from ? Thanks a lot in advance. Pierre IMBERT, pierre.imbert@insa-strasbourg.fr
If you are using different glazing types the luminance should change. The glazing properties should be changed in the following way: Opening > Glazing types > Glazing data (if you click the 'Project external glazing', in the right side of the screen the glazing data should come) > Change the type. If you simulate daylight now, it should show the difference.
@Kumar Biswajit Debnath, Thanks a lot for this tutorial. I followed the same procedure with my 5m by 5m private office but I get larger illuminance values such as 5600 lux. Any idea to have more realistic values? Weather file used is SriLanka, Katunayake.
If you have large windows and clear glass, in the context of Sri Lanka, that may be possible. Highly depends on the size and position of the apertures of your modelled office.
@@biswajit512 Thanks a lot. Actually the highest value I got is 56,000 lux (not 5600 lux - apologies) in that 5m by 5m model. However, when I increased the model dimensions to 10 by 16 m, I received much lower (~7000 lux near clear glazed window with 65WWR). Another question, I believe this is the available daylight illuminance at a particular point at the specified work plane height. So, if I measured the illuminance at this point with a lux meter, the reading could be much lower than the simulated result depending on several reasons such as the work plane surface color etc. So, I can't use the values from the lux meter to validate the illuminance results from the simulated model. Can I?
@@dilininishadika5524 Or it can be higher depending on the colour of the walls and other reflective surfaces and positioning, which may increase the lux level. You can use the lux meter to validate the simulation model. You just need to see from the literature what is the acceptable difference of lux level between simulated and real-world situation. They will be always different but you need to acknowledge and show that how much is the difference and the possible reasons behind it with references from existing literature.
Thanks a lot for the tutorial. How can i carry out daylight glare index analysis using design builder?
You are welcome. Please see the following link for Glare index output: bigladdersoftware.com/epx/docs/8-9/input-output-reference/output-table-summaryreports.html#daylightingreportmonthly
Also, you can see the Glare INdex in the Output variable list just under the variable I selected at 16:00 in the video.
Hello. Thank you for your good training. I had a question about DesignBuilder, if possible, please answer.
From another software, I calculated the ambient temperature for one hour on a specific day in a street and modeled this street in DesignBuilder. Now I want to enter this temperature manually for this street and get energy analysis from DesignBuilder. Is this possible in DesignBuilder software?
Hi, Thank you for the question. As far as I know, such calculations are not feasible in the DesignBuilder. Such urban morphological/outdoor simulation is possible in EnviMet. But then again, the building's internal energy analysis will not be possible in EnviMet. I hope that answers your question.
Hi! Thanks for the tutorial. I'm using v7 of DesignBuilder and I don't see the export energy plus input file simulation option. Do you know where can I get the illuminance input file?
Hi! Usually, if the software is not licenced, then the export option does not appear. In the case of illuminance input, as far as I know, you do not need to input any file. In DB, the lighting controls that you need to input for the simulation. I hope that helps.
Thanks a lot for this tutorial. By the way, the illuminance values you obtain at the end on the Excel sheet, are they supposed to change if we change the glazing type in the DesignBuilder model ?
The illuminance values may change depending on the glazing types in DB model.
Thank you for your answer.
I follow you procedure in order to study illuminance in a one-window room for several glazing solutions. At the end, I always have the same illuminance values, independantly of the glazing type, the weather file or the sky conditions. However, the illuminance changes well when I change the dimensions of the openings (for example, illuminance reduces when I reduce the window size). Would you have an idea were my errors come from ? Thanks a lot in advance.
Pierre IMBERT, pierre.imbert@insa-strasbourg.fr
If you are using different glazing types the luminance should change. The glazing properties should be changed in the following way: Opening > Glazing types > Glazing data (if you click the 'Project external glazing', in the right side of the screen the glazing data should come) > Change the type. If you simulate daylight now, it should show the difference.
Thank you for your help ! :)
@Kumar Biswajit Debnath, Thanks a lot for this tutorial. I followed the same procedure with my 5m by 5m private office but I get larger illuminance values such as 5600 lux. Any idea to have more realistic values? Weather file used is SriLanka, Katunayake.
If you have large windows and clear glass, in the context of Sri Lanka, that may be possible. Highly depends on the size and position of the apertures of your modelled office.
@@biswajit512 Thanks a lot. Actually the highest value I got is 56,000 lux (not 5600 lux - apologies) in that 5m by 5m model. However, when I increased the model dimensions to 10 by 16 m, I received much lower (~7000 lux near clear glazed window with 65WWR).
Another question, I believe this is the available daylight illuminance at a particular point at the specified work plane height. So, if I measured the illuminance at this point with a lux meter, the reading could be much lower than the simulated result depending on several reasons such as the work plane surface color etc. So, I can't use the values from the lux meter to validate the illuminance results from the simulated model. Can I?
@@dilininishadika5524 Or it can be higher depending on the colour of the walls and other reflective surfaces and positioning, which may increase the lux level. You can use the lux meter to validate the simulation model. You just need to see from the literature what is the acceptable difference of lux level between simulated and real-world situation. They will be always different but you need to acknowledge and show that how much is the difference and the possible reasons behind it with references from existing literature.
Thanks
I can not generate daylight parameters. can you suggest me to solve this problem?
Can you be more specific on which daylight parameters you want to generate (I am assuming as output variables), please?
can i ask you that how to see ase ? thank you
This might help: designbuilder.co.uk/helpv7.0/Content/AnnualDalylightingOutputsAndDisplayOptions.htm