ESTGV - DEC - Artigo em revista científica, não indexada ao WoS/Scopus
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Browsing ESTGV - DEC - Artigo em revista científica, não indexada ao WoS/Scopus by Author "Almeida, Ricardo"
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- Experimental assessment of IAQ improvement in naturally ventilated educational buildingsPublication . Pinto, Manuel; Almeida, Ricardo; Pinho, Paulo; Lemos, Luís; Lanzinha, JoãoIndoor environmental conditions in classrooms, in particular temperature and indoor air quality, influence students’ health, attitude and performance. In recent years several studies regarding indoor environmental quality of classrooms were published and natural ventilation proved to have great potential, particularly in southern European climate. This research aimed to evaluate indoor environmental conditions in 8 schools and to assess their improvement potential by simple natural ventilation strategies. Temperature, relative humidity and carbon dioxide concentration were measured in 32 classrooms. Ventilation performance of the classrooms was deeply characterized by tracer gas measurements of the air change rate assuming different windows related boundary conditions. A total of 110 tracer gas measurements were made. The complete characterization of the classrooms ventilation performance was relevant for the definition of the ventilation protocol since air change rate helped to pinpoint the best ventilation strategy for each case study. The results of the ventilation protocol implementation were very encouraging and, globally, a significant decrease on the CO2 concentration was observed without modifying the comfort conditions. This paper presents and discusses the main conclusions of the measurements campaign performed in the referred classrooms.
- Indoor environmental quality of classrooms in Southern European climatePublication . Almeida, Ricardo; Freitas, VascoThe indoor environmental quality within a classroom is linked to the health, comfort and performanceof students. It is well established that there are classroom environments where indoor environmentalquality is poor. Therefore, the rehabilitation of school buildings is assumed as an appropriate strategy.Consequently, some countries have sponsored nationwide programs for the rehabilitation of school build-ings, whose result has been, in some cases, other than the expected. Classrooms performance in serviceconditions must be evaluated and, from the results, optimized solutions should be established and care-fully designed and executed to have the desired effect. Thus, a research project was defined, aiming toassess the impact of retrofit on the indoor environmental quality of school buildings. The methodologyused included the in situ measurement of temperature, relative humidity, carbon dioxide concentrationand ventilation rates. A total of 24 classrooms of 9 school buildings (2 non-retrofitted and 7 recentlyretrofitted) were studied. A long term monitoring was defined with three measurement campaigns:winter, mid-season and summer conditions, each with three weeks length. The results confirmed thatnon-retrofitted schools need to improve their indoor environmental conditions and in retrofitted build-ings mechanical ventilation systems are not being used, with important consequences on the indoor airquality.
- Natural ventilation and indoor air quality in educational buildings: experimental assessment and improvement strategiesPublication . Almeida, Ricardo; Pinto, Manuel; Pinho, Paulo G.; Lemos, Luís T. deIndoor environmental conditions in classrooms, in particular temperature and indoor air quality, influence students’ health, attitude and performance. In recent years, several studies regarding indoor environmental quality of classrooms were published and natural ventilation proved to have great potential, particularly in southern European climate. This research aimed to evaluate indoor environmental conditions in eight schools and to assess their improvement potential by simple natural ventilation strategies. Temperature, relative humidity and carbon dioxide concentration were measured in 32 classrooms. Ventilation performance of the classrooms was characterized using two techniques, first by fan pressurization measurements of the envelope airtightness and later by tracer gas measurements of the air change rate assuming different envelope conditions. A total of 110 tracer gas measurements were made and the results validated ventilation protocols that were tested afterward. The results of the ventilation protocol implementation were encouraging and, overall, a decrease on the CO2 concentration was observed without modifying the comfort conditions. Nevertheless, additional measurements must be performed for winter conditions.
- Reabilitação de edifícios escolares: avaliação do desempenho higrotérmico em serviço e exigências regulamentaresPublication . Freitas, Vasco Peixoto de; Almeida, Ricardo