Evaluation of hybrid ventilation control strategies in residential buildings

This paper deals with the development and the evaluation of hybrid ventilation control strategies, using both natural and mechanical mode, in residential buildings. The case study is a single dwelling and it includes a mechanical ventilation system based on the french national regulation and a hybrid ventilation system used in the framework of the European project RESHYVENT. Two demand control strategies have been developed for hybrid ventilation system, the first one is based on the occupant detection and the second one is based on the CO2 levels in the dry rooms. For the evaluation of hybrid ventilation control strategies, yearly simulations have been performed in four European climates (Athens, Nice, Stokholm and Trappes) using SIMBAD Building and HVAC Toolbox. The assesment criteria used are related to indoor air quality and to energy consumptions. The main conclusion of this work is the ability of hybrid ventilation systems to improve indoor air quality and to reduce fan energy consumption with respect to reference system while maintaining the same building energy consumption for heating.