Unmet Hours - RSS feedhttps://unmethours.com/questions/Question-and-Answer Resource for the Building Energy Modeling CommunityenWed, 05 Nov 2014 11:40:06 -0600non-convex space in CBECC-Comhttps://unmethours.com/question/992/non-convex-space-in-cbecc-com/ Is it possible to model a non-convex space using only one thermal zone?Tue, 04 Nov 2014 18:50:10 -0600https://unmethours.com/question/992/non-convex-space-in-cbecc-com/Answer by cbecc for <p>Is it possible to model a non-convex space using only one thermal zone?</p>
https://unmethours.com/question/992/non-convex-space-in-cbecc-com/?answer=1013#post-id-1013A so-called “non-convex” space or zone is one where one or more surfaces cannot “see” one or more of the other surfaces in the space or zone. A common example would be an “L” shaped zone. If EnergyPlus is run with “Solar Distribution” set to FullInteriorAndExterior, a zone like this will create errors. However, CBECC-Com runs the EnergyPlus models with Solar Distribution set to FullExterior. In this case, beam solar radiation entering the zone is assumed to fall on the floor, where it is absorbed according to the floor's solar absorptance. Any radiation reflected by the floor is added to the transmitted diffuse radiation, which is assumed to be uniformly distributed on all interior surfaces. Non-convex spaces or zones do not create problems when FullExterior solar distribution is used. Wed, 05 Nov 2014 11:40:06 -0600https://unmethours.com/question/992/non-convex-space-in-cbecc-com/?answer=1013#post-id-1013