NCEUB Conferences, 13th International Radiance Workshop 2014

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Design optimization using Genopt and Daysim
Khaled Nassar

Building: Arup 8 Fitzroy St.
Room: Emmerson & Shears Room
Date: 2014-09-02 11:30 AM – 12:00 PM
Last modified: 2014-08-24


Optimization and parametric runs are often common procedures for anyone practicing daylight or lighting design. Daylight professionals often use simulation tools for their analysis. DAYSIM, for example, is a validated, RADIANCE-based daylighting analysis software that models the annual amount of daylight in and around buildings. Performing parametric runs or optimization using DAYSIM manually if often time consuming. GenOpt is an optimization program for the minimization of a cost function that is evaluated by an external simulation program, such as EnergyPlus, TRNSYS, Dymola, IDA-ICE or DOE-2. By coupling GneOpt with DAYSIM, professionals can easily search the design space for optimum solutions or perform parametric runs on their design. However, to date GenOpt has only been used in optimization with RADIANCE and has not been coupled with DAYSIM. This paper shows how use the wide array of local and global multi-dimensional and one-dimensional optimization algorithms in GENOPT in conjunction with DAYSIM. A number of design cases where the gradient of the cost function is not available are presented and we show they can be solved using the approach presented here. The paper also addresses how to use the algorithms in GENOPT for doing parametric runs.