Application of fuzzy logic in the regulation of Internal Environment of buildings

Internal environments in buildings can greatly benefit from the application of automated regulation. Such systems can lower energy consumption and boost user efficiency. Best results can be achieved through the application of a holistic approach where the buildings envelopes as well as the installed systems are regulated by an integral system for visual, thermal and ventilation parameters. In the paper an Integral Control system of Internal Environment (ICsIE) is presented and described. The system uses fuzzy logic controllers as well as conventional PI controllers linked in a cascade system. The system is installed in an occupied office of the Faculty of Civil and Geodetic Engineering (FGG) in Ljubljana, Slovenia. The system has been operational since early 2009 and is capable to regulate internal visual, thermal and ventilation parameters of the office. System efficiency has been proven through numerous experiments, one of which is also presented in the paper.