Browsing by Author "Gameiro da Silva, Manuel"
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- Indoor climate quality assessment in civil aircraft cabins: A field studyPublication . Gameiro da Silva, Manuel; Broday, Evandro Eduardo; Rodrigues Ruivo, CelestinoIndoor Climate Quality is the way to assess how much thermal and indoor air quality conditions might influence people's comfort indoors. Passengers traveling on commercial airplanes are increasingly demanding comfort inside the cabin. So, creating a comfortable environment is a relevant requirement to be considered. Although indoor climate standards cover mainly buildings, other indoor environments may use the same concepts. This study aimed to present a multiprobe device for indoor climate quality assessment and a methodology to cate-gorize thermal comfort and indoor air quality levels in twenty-five flights between 2019 and the beginning of 2020. Data were collected in two distinct seasons, Heating and Cooling, regarding the mode of use of HVAC systems, depending on the predominant passengers' clothing set, for different aircraft types and routes. It was analyzed how much thermal comfort and indoor air quality parameters are in accordance with the categories established in the EN 16798-1 standard. As the main findings, it can be concluded that the environmental pa-rameters analyzed on flights were mostly within the comfort range. However, there is a possibility of improvement in thermal comfort since the predominance of values in the best comfort category is still marginal, focusing on the study of air cleaning and air distribution flow to improve people's comfort and energy saving.
- Study on thermal comfort by using an atmospheric pressure dependent predicted mean vote indexPublication . Ruivo, Celestino; Gameiro da Silva, Manuel; Broday, Evandro EduardoThe thermal environment index Predicted Mean Vote is a descriptor largely applied to evaluate the comfort sensation of people in moderate environments. Software tools based on the Fanger's method have been created and used, which application is limited for the sea level atmospheric pressure. A procedure for estimating the index of thermal comfort of individuals in environments at air pressure different from barometric pressure 0 m of altitude was recently introduced. In present study, indoor air state associated with neutral thermal comfort conditions of individuals in seating activity are predicted for atmospheric pressure values in the range between 65.0 kPa and 101.3 kPa. It was observed that neutral temperature diminishes with the decrease of barometric pressure. Dependencies of index PMV on the activity level, the clothing insulation, relative, air velocity and on relative humidity for two atmospheric pressure values are investigated. It is concluded that the impact of pressure of the environment on the index of thermal comfort must be also considered when sizing an air-conditioning system.