Name: Patryck Machado de Almeida
Type: MSc dissertation
Publication date: 26/03/2019

Namesort descending Role
Cristina Engel de Alvarez Advisor *

Examining board:

Namesort descending Role
Cristina Engel de Alvarez Advisor *
Edna Aparecida Nico Rodrigues Co advisor *
Erica Coelho Pagel External Examiner *
Geilma Lima Vieira Internal Examiner *

Summary: The increase in energy consumption is a theme that has aroused a wide concern of
many researchers and authorities in almost all the world, and one of the factors that
influence this consumption is the increasing in the use of artificial acclimatization
systems, mainly air conditioners. Thus, the search for buildings that demand less
energy has become increasingly common in the last years. Therefore, the use of
natural ventilation stands out as an important strategy to promote thermal comfort and
indoor air quality, with minimal or no energy consumption at all. The research evaluated
the hygrothermal conditions and the air movement acceptability as a comfort strategy
in a naturally ventilated educational environment in the city of Vitória / ES, which
climate is classified as tropical hot and humid. It also verified the influence of the
ventilation on the comfort of the users and the impact of prior exposure of users to
conditioned environments in their thermal preference. For this, measurements of the
internal environmental variables (air temperature, globe temperature, relative air
humidity and air velocity) were carried out while the occupants answered the
questionnaire regarding thermal sensations and air velocity. In this way, the
associations between the values of the environmental variables and the sensations
reported by the occupants were obtained. The results are presented in the form of
tables and graphs by relating the internal microclimatic variables with the occupants'
responses. The results demonstrated that the highest values of thermal neutrality were
concentrated with the operating temperature between 26 °C and 28 °C. The occupants,
for the most part, accepted air velocities above 1m/s, mainly from 26ºC, and these
were fundamental in reducing thermal discomfort by heat. There were differences
between the thermal preference of occupants with and without the routine exposure to
air conditioned environments. Regarding the type of acclimatization in the environment
studied, 53.6% of users answered that they prefer natural ventilation, while 26.8%
prefer natural ventilation and fans and 19.6% opted for air conditioning.

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