Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Speaking mainly from my experience with DOE-2.1E, I don't think any version of DOE-2 allows for dynamic switching of a building envelope component. With simple windows defined by U and SC (SHGC), it is possible to add a SHADING-SCHEDULE and a CONDUCTANCE-SCHEDULE that can vary however you want (in 2.1E you could reference them with a FUNCTION, and I presume in DOE-2.2/2.3 with an Expression), but I think of that more as modeling drapes and shade screens and not as switching the windows themselves. The other thing to keep in mind is that the thermal behavior of the zone, i.e., its WEIGHTING-FACTOR, will always be constant. If the glazing area is limited, i.e., if the WWR is less than 20, that's not too bad, but if the WWR is large your results will be questionable. That was a problem I encountered many years ago when DOE wanted LBNL to model attached greenhouses with movable insulation at night.
