Modeling an Electrochromic Window Using a Multi-criteria Control Strategy

Electrochromic (EC) glazing products have the ability to actively control solar transmission based on low voltage input. While this technology has been around for several years, the default options to model EC glazing in current simulation tools is still limited and often does not allow a full evaluation of multi-state EC products with predictive controls. Given a growing interest from the design community for incorporating EC glazing in high performance and net zero energy buildings, this paper will present a methodology for modeling a commercially available multi-state EC product with the actual control logic using EMS and compare the results with the default modeling approach.