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Plenary
Speech:
Modelling of Thermal Comfort Conditions in Buildings
Prof. Lajos Barna
Department of Building Service and Process Engineering,
Budapest University of Technology and Economics
H 1541 Budapest,
HUNGARY
E-mail: barna@epgep.bme.hu
Web site:
http://www.lza.lv/scientists/buikis.htm
Abstract: The enhancement of buildings’ energy performance
puts emphasis on meeting the comfort requirements indoors, as the acceptable
environments have to be provided from less energy.
The comfort of the occupant is determined by the heat exchange between his body
and his indoor environment. The heat exchange mainly depends on the temperature
of the surrounding surfaces and the air temperature as well as on the velocity
of the air movement. The temperature, the velocity distribution and the heat
exchange between the human body and its’ surroundings can be described by
analytic and numeric models. The steps of the modelling are the following:
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creating a geometric model,
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definition of the equations and differential equations that can
be applied to the phenomenon; setting of the initial and boundary conditions,
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elaboration of the mathematic or numeric model,
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modelling of the temperature and the velocity distribution in the
space, and of the heat exchange between the occupant and his environment for the
set conditions.
The paper discusses and evaluates mathematic and numeric modelling examples.
Brief Biography of the Speaker:
Name: Dr. Lajos Barna PhD
Qualifications: MSc in Mechanical Engineering in 1972, Technical University of
Budapest
University positions:
Associate professor, 1999-
Comprehensive examination in mechanical engineering: 1983; PhD: 1998.
Teaching and research experience:
Lecturer of several subjects for building service engineering students: Heating,
Water supply, Gas supply, District heating supply. Tutor of diploma works.
Major subjects of research works:
Energetic examination and evaluation of buildings;
Modelling of comfort conditions in building;
Investigation of air supply conditions in the room of gas appliances.
He has more than 100 publications in scientific journals and scientific
conferences.
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