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Indeed, Radiance is quite a bit better suited to exploring geometries more complex than a box. Radiance also provides radiometric results by default (though only for energy in the visible spectrum), most people just immediately push those numbers through V-lambda since most Radiance users are interested in photometric answers. I digress.

Radiance's geometric prowess was exploited for an EnergyPlus-related Radiance utility released earlier this year, called "eplus_adduvf". This utility takes an idf as input and computes view factors for all the surfaces, or something. I don't think there's a manpage for it, but the source code is here.

I believe it was Tianzhen Hong at LBL who got the ball rolling on Greg Ward's development of eplus_adduvf, and probably knows the most about the proper application of the utility toward thermal load calculations. LBL also did some other work internally on this, but I don't know if anything was ever published. Andy McNeil presented the status of that work at the time, at the 2011 Radiance Workshop in Berkeley. Have a look here.

If only there was a model and API that would allow users to tie these elements together. (ahem) =)

Indeed, Radiance is quite a bit better suited to exploring geometries more complex than a box. Radiance also provides radiometric results by default (though only for energy in the visible spectrum), most people just immediately push those numbers through V-lambda since most Radiance users are interested in photometric answers. I digress.

Radiance's geometric prowess was exploited for an EnergyPlus-related Radiance utility released earlier this year, called "eplus_adduvf". This utility takes an idf as input and computes view factors for all the surfaces, or something. I don't think there's a manpage for it, but the source code is here.

I believe it was Tianzhen Hong at LBL who got the ball rolling on Greg Ward's (@GregWard) development of eplus_adduvf, and probably knows the most about the proper application of the utility toward thermal load calculations. LBL also did some other work internally on this, but I don't know if anything was ever published. Andy McNeil (@andyrew) presented the status of that work at the time, at the 2011 Radiance Workshop in Berkeley. Have a look here.

If only there was a model and API that would allow users to tie these elements together. (ahem) =)

Indeed, Radiance is quite a bit better suited to exploring geometries more complex than a box. Radiance also provides radiometric results by default (though only for energy in the visible spectrum), most people just immediately push those numbers through V-lambda since most Radiance users are interested in photometric answers. I digress.

Radiance's geometric prowess was exploited for an EnergyPlus-related Radiance utility released earlier this year, called "eplus_adduvf". This utility takes an idf as input and computes view factors for all the surfaces, or something. I don't think there's a manpage for it, but the source code is here.

I believe it was Tianzhen Hong at LBL who got the ball rolling on Greg Ward's (@GregWard) (GregWard) development of eplus_adduvf, and probably knows the most about the proper application of the utility toward thermal load calculations. LBL also did some other work internally on this, but I don't know if anything was ever published. Andy McNeil (@andyrew) (andyrew) presented the status of that work at the time, at the 2011 Radiance Workshop in Berkeley. Have a look here.

If only there was a model and API that would allow users to tie these elements together. (ahem) =)