An analysis of influences of blinds and solar radiation on microclimate in office rooms during summer days: a pilot study
Laen...
Kuupäev
2019
Kättesaadav alates
Autorid
Cao, D.V.
Kic, P.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Windows are the only part of a building that can directly penetrate the solar radiation
into the occupied space and thus the shading devices are needed to control the solar penetration.
In the office buildings, they usually use external blinds and internal blinds to reduce heat gains
during summer caused by sunlight as well as solar radiation. Therefore, these blinds are main part
to maintain thermal comfort for office workers. The aim of this paper is to present results of
measurements in four big office rooms in different situations of blinds application. Then, the
influence of the internal and external blinds on the internal microclimate conditions inside the
large offices during the hot summer days with high solar radiation will be evaluate. The offices
floor area is from 43.3 m2
to 59.5 m2
and height 2.8 m. The experiments in this research were
focused on measurement and evaluation of globe temperature, indoor air temperature and relative
humidity at level of working place during several hot summer days. Comparison of the results of
short-term measurements in a room with open blinds and closed blinds has shown the influence
of the blinds on the reduction of indoor temperature. More significant was the effect of external
aluminium blinds. Solar energies passing through the windows into the interior were 3,476 W
without blind and 305 W in case of aluminium venetian external blinds. When the maximum
outside temperature was 29.9 °C and office workers used blinds with natural ventilation, the
maximum air temperatures in four rooms were from 27.2 °C to 28.5 °C, which exceeded
maximum recommended temperature (28 °C). The external aluminium venetian blinds and
internal fabric vertical blinds did not maintain thermal comfort inside the offices during all
summer days, but it can help in reduction of energy consumption for air-conditioning.
Kirjeldus
Article
Märksõnad
air-temperature, glazed window, globe temperature, measurement, articles