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Mutual influence of external wall thermal transmittance, thermal inertia, and room orientation on office thermal comfort and energy demandBožiček, David ...Upgrades in building energy efficiency codes led to differences between buildings designed according to outdated codes and those with most recent requirements. In this context, our study investigates ... the influence of external wall thermal transmittance, thermal inertia, and orientation on energy demand (heating, cooling) and occupant thermal comfort. Simulation models of an office building were designed, varying (i) the thermal transmittance values (0.20 and 0.60 W/(m2K)), (ii) the room orientation (four cardinal directions), and (iii) the wall thermal inertia (approximately 60 kJ/(m2K) for low and 340 kJ/(m2K) for high thermal inertia. The energy demand for heating and cooling seasons was calculated for Ljubljana using EnergyPlus 9.0.0 software. The reduction of the external wall thermal transmittance value from 0.6 W/(m2K) to 0.2 W/(m2K) contributes to significant energy savings (63% for heating and 37% for cooling). Thermal inertia showed considerable potential for energy savings, especially in the cooling season (20% and 13%, depending on the external wall insulation level). In addition, the orientation proved to have a notable impact on heating and cooling demand, however not as pronounced as thermal inertia (up to 7% total energy demand). Comparison of the thermal comfort results showed that when internal air temperatures are identically controlled in all the rooms (i.e., internal air temperature is not an influencing factor), the external wall thermal transmittance, thermal inertia, and room orientation show negligible influence on the average occupant thermal comfort. The simultaneous achievement of thermally comfortable conditions in the working environment and low energy use can only be achieved by simultaneously considering the U-value and thermal inertia.Source: Energies [Elektronski vir]. - ISSN 1996-1073 (Vol. 16, iss. 8, art. 3524, apr. 2023, str. 1-29)Type of material - e-article ; adult, seriousPublish date - 2023Language - englishCOBISS.SI-ID - 151106819
Author
Božiček, David |
Kunič, Roman, 1961-2019 |
Krainer, Aleš |
Stritih, Uroš |
Dovjak, Mateja
Topics
raba energije |
toplotno udobje |
raba energije |
toplotna inercija |
orientacija |
office building |
thermal comfort |
energy demand |
thermal inertia |
orientation
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Božiček, David | 39878 |
Kunič, Roman, 1961-2019 | 06699 |
Krainer, Aleš | 02182 |
Stritih, Uroš | 15163 |
Dovjak, Mateja | 29265 |
Source: Personal bibliographies
and: SICRIS
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