CONTROLE DE OPERAÇÃO DE EDIFÍCIOS DE ESCRITÓRIOS COM VENTILAÇÃO HÍBRIDA

UMA ANÁLISE DO COMPORTAMENTO DO USUÁRIO

Abstract

Buildings that combine the use of air conditioning with natural ventilation, also known as mixed-mode ventilated buildings, have been a recurrent subject of research over the past two decades, due to its great potential for energy saving. Under the promise of ensuring thermal comfort at a low energy consumption, these constructions face the challenge of having its occupant behavior barely known and a gap in international standards, concerning thermal comfort models that fulfill its specificities. This paper reports the field research developed through four measurement rounds, comprised within the interval of one year, of three office rooms from mixed-mode buildings located in the city of São Paulo, aiming to analyze and understand occupant behavior in buildings where users are able to freely operate both windows and airconditioning equipment. Indoor environmental variables were monitored, as well as user control variables (manual operation of air-conditioning and natural ventilation systems). Measured data were compared with predictive thermal comfort models from ASHRAE 55-2017 and EN 15251-2007, in order to identify which thermal comfort model best represents the situation found. The results observed were: similar setpoints adopted for air-conditioned and naturally ventilated periods; passive users regarding interactions with ventilation strategies (few alterations between both systems during the day); inadequacy of the static model and good compatibility of the adaptive model, being possible to consider the strands from ASHRAE 55-2017 and EN 15251-2007 equally effective.