A framework for automated control and commissioning of hybrid ventilation systems in complex buildings

Complex commercial buildings consume a significant amount of energy through their ventilation and cooling systems. Hybrid ventilation can help reduce these loads while providing building occupants with a comfortable environment. This research develops a generic automated hybrid ventilation control for public spaces of complex commercial buildings, and identifies a commissioning methodology which determines the best way to operate a hybrid ventilation system in a retrofitted or occupied building. This control was verified through a case study of a complex building. The results show that the system could be used through 28% of the 128-day cooling season resulting in 20% energy savings in comparison to traditional mechanical ventilation in the public space. The implementation of the automated control helped develop a hybrid ventilation operation protocol through commissioning during the operation phase in lieu of developing complex air-flow models for the installed system in the case study building.

► Automated control for hybrid ventilation system operation in complex buildings ► Best hybrid ventilation strategy for case study building was obtained. ► A commissioning methodology was developed using the automated control. ► Performance metrics evaluated: thermal comfort, indoor-air quality, and energy savings ► Significant energy savings using hybrid ventilation while meeting other metrics