A novel and dynamic demand-controlled ventilation strategy for CO2 control and energy saving in buildings

Publication year: 2011
Source: Energy and Buildings, In Press, Accepted Manuscript, Available online 13 June 2011

Tao, Lu , Xiaoshu, Lu , Martti, Viljanen

Although conventional CO2-based demand-controlled ventilation strategies, such as proportional and exponential controls, can ensure buildings/spaces meeting the minimum requirements of outdoor air by industry standards, they are operated under the assumption of equilibrium condition which can hardly be reached in practice and therefore there is still much space to improve on conventional strategies in terms of energy saving. In this paper, a novel and dynamic control strategy was developed for hourly scheduled buildings. The strategy utilized schedules by setting a base ventilation rate for unoccupied periods and calculating ventilation rate dynamically at each occupied period by solving the CO2 mass…

 Highlights: ► We developed a novel and dynamic CO2-based DCV strategy for sports training arenas. ► Indoor CO2 concentration can be controlled near the set point at each training session. ► About +34% of energy related to ventilation air can be saved compared to proportional control. ► The new strategy can also be applied to common buildings which are occupied for almost all opening hours.