https://sam.ensam.eu:443 The DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material. Wed, 11 Mar 2026 22:07:49 GMT 2026-03-11T22:07:49Z http://hdl.handle.net/10985/15495 Ventilation rates and thermal comfort assessment in a naturally ventilated classroom ALLAB, Yacine; KINDINIS, Andrea; CAUSONE, Francesco; TATTI, Anita; SIMONET, Sophie; BAYEUL-LAINÉ, Annie-Claude Ventilation systems are meant (i) to guarantee good indoor air quality (IAQ) by providing and distributing fresh air to the occupied/breathing zone and (ii) to dilute and remove pollutants emitted by indoor sources. On the other hand, inadequate ventilation rates can induce discomfort issues and excessive energy consumption. This study focuses on the performance assessment of natural ventilation strategies in university classrooms, which are characterized by a high occupancy level and the necessity to provide high levels of comfort to perform intellectual work. The high occupancy level creates challenging conditions both in terms of internal gains and CO2 concentration. This paper presents an experimental performance assessment of four natural ventilation strategies applied to a university classroom: single side ventilation, cross ventilation, stack ventilation with and without window supply. Each strategy is evaluated in terms of thermal comfort and air change rate measurements. Thermal comfort assessment were performed during occupancy period (physical parameter measurements and questionnaires) whereas air change rate measurements, based on tracer gas techniques, were performed during unoccupied periods. Fri, 01 Jan 2016 00:00:00 GMT http://hdl.handle.net/10985/15495 2016-01-01T00:00:00Z ALLAB, Yacine KINDINIS, Andrea CAUSONE, Francesco TATTI, Anita SIMONET, Sophie BAYEUL-LAINÉ, Annie-Claude Ventilation systems are meant (i) to guarantee good indoor air quality (IAQ) by providing and distributing fresh air to the occupied/breathing zone and (ii) to dilute and remove pollutants emitted by indoor sources. On the other hand, inadequate ventilation rates can induce discomfort issues and excessive energy consumption. This study focuses on the performance assessment of natural ventilation strategies in university classrooms, which are characterized by a high occupancy level and the necessity to provide high levels of comfort to perform intellectual work. The high occupancy level creates challenging conditions both in terms of internal gains and CO2 concentration. This paper presents an experimental performance assessment of four natural ventilation strategies applied to a university classroom: single side ventilation, cross ventilation, stack ventilation with and without window supply. Each strategy is evaluated in terms of thermal comfort and air change rate measurements. Thermal comfort assessment were performed during occupancy period (physical parameter measurements and questionnaires) whereas air change rate measurements, based on tracer gas techniques, were performed during unoccupied periods. http://hdl.handle.net/10985/8951 INDOOR CLIMATE QUALITY ASSESSMENT IN HIGH SCHOOL CLASSROOM : VENTILATION STRATEGIES AND OCCUPANCY MANAGEMENT ALLAB, Yacine; KINDINIS, Andrea; BAYEUL-LAINÉ, Annie-Claude; SIMONET, Sophie; COUTIER-DELGOSHA, Olivier More than a well-being, providing a good Indoor Climate Quality (ICQ) in education buildings is necessary for students’ health and in order to maximize academic results. In the context of a research focusing on hybrid ventilation strategies, this paper presents the results of a first survey on thermal comfort and indoor air quality in high school classrooms; the results will be subsequently used to develop strategies on mixed mode ventilated classrooms. The objects of the study are the classrooms of ESTP, a civil engineering school located in Cachan, a suburban city in southern of Paris, France. The survey lasted one month during the mid-season. The classrooms are equipped with a mechanical ventilation system and with windows, so that various solutions can be tested based on natural, mechanical and hybrid ventilation. After a first period of monitoring and an analysis of initial conditions, ICQ was analyzed in different conditions according to the schedule and the occupancy of the investigated classrooms. Indoor climate quality is assessed using objective (measurement campaign) and subjective survey (questionnaire). The measuring campaign includes measurement of thermal comfort parameters (temperature, mean radiant temperature, air flow velocity, and humidity) and indoor air quality parameters (CO2 concentration, CO concentration and humidity). Thermal comfort is assessed using respectively analytic theory (ISO 7730) and extended PMV for non-air conditioned buildings (adaptive PMV). IAQ (indoor air quality) is evaluated according to the level of CO2 concentration. The questionnaire submitted to the students included 9 indexes for subjective assessment of thermal comfort and indoor air quality perception. It includes questions about sensation/preference of indoor climate quality and the satisfaction about the control of indoor climate. Additional issues are requested for PMV (Predicted Mean Vote) calculation (metabolism, clothing). According to the level of occupancy which characterizes various periods, it is found that the ICQ evolves during a school day. Moreover, the influence of the occupancy level was more significant on thermal comfort, especially in warm conditions. Wed, 01 Jan 2014 00:00:00 GMT http://hdl.handle.net/10985/8951 2014-01-01T00:00:00Z ALLAB, Yacine KINDINIS, Andrea BAYEUL-LAINÉ, Annie-Claude SIMONET, Sophie COUTIER-DELGOSHA, Olivier More than a well-being, providing a good Indoor Climate Quality (ICQ) in education buildings is necessary for students’ health and in order to maximize academic results. In the context of a research focusing on hybrid ventilation strategies, this paper presents the results of a first survey on thermal comfort and indoor air quality in high school classrooms; the results will be subsequently used to develop strategies on mixed mode ventilated classrooms. The objects of the study are the classrooms of ESTP, a civil engineering school located in Cachan, a suburban city in southern of Paris, France. The survey lasted one month during the mid-season. The classrooms are equipped with a mechanical ventilation system and with windows, so that various solutions can be tested based on natural, mechanical and hybrid ventilation. After a first period of monitoring and an analysis of initial conditions, ICQ was analyzed in different conditions according to the schedule and the occupancy of the investigated classrooms. Indoor climate quality is assessed using objective (measurement campaign) and subjective survey (questionnaire). The measuring campaign includes measurement of thermal comfort parameters (temperature, mean radiant temperature, air flow velocity, and humidity) and indoor air quality parameters (CO2 concentration, CO concentration and humidity). Thermal comfort is assessed using respectively analytic theory (ISO 7730) and extended PMV for non-air conditioned buildings (adaptive PMV). IAQ (indoor air quality) is evaluated according to the level of CO2 concentration. The questionnaire submitted to the students included 9 indexes for subjective assessment of thermal comfort and indoor air quality perception. It includes questions about sensation/preference of indoor climate quality and the satisfaction about the control of indoor climate. Additional issues are requested for PMV (Predicted Mean Vote) calculation (metabolism, clothing). According to the level of occupancy which characterizes various periods, it is found that the ICQ evolves during a school day. Moreover, the influence of the occupancy level was more significant on thermal comfort, especially in warm conditions.