Experimental and statistical survey on local thermal comfort impact on working productivity loss in university classrooms
Апстракт
The paper presents an experimental analysis of the relationship between local thermal comfort and productivity loss in classrooms. The experimental investigation was performed in a real university classroom during the winter semester in city of Belgrade. Measurements were taken for four scenarios, with different indoor comfort conditions. Variations were made by setting the central heating system on/off, adding an additional heat source to provoke higher indoor temperatures, and measuring the radiant asymmetry impact. Innovative questionnaires were developed especially for the research, in order to investigate students' subjective feelings about local thermal comfort and indoor environmental quality Local predicted mean vote and predicted percentage dissatisfied indices were calculated using data measured in situ. The results were compared to existing models recommended in literature and European and ASHRAE standards. Student productivity was evaluated using novel tests, designed to fi...t the purposes of the research. Surveys were conducted for 19 days under different thermal conditions, during lectures in a real classroom, using a sample of 240 productivity test results in total. Using the measured data, new correlations between the predicted mean vote, CO2, personal factor and productivity loss were developed. The research findings imply that local thermal comfort is an important factor that can impact productivity, but the impact of the personal factor is of tremendous importance, together with CO2 concentration in the classroom.
Кључне речи:
working productivity loss / predicted percentage dissatisfied / predicted mean vote / local thermal comfort / indoor environmental qualityИзвор:
Thermal Science, 2019, 23, 1, 379-392Издавач:
- Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
Финансирање / пројекти:
- Интелигентни системи управљања климатизације у циљу постизања енергетски ефикасних режима у сложеним условима експлоатације (RS-MESTD-Technological Development (TD or TR)-33047)
- Унапређење енергетских карактеристика и квалитета унутрашњег простора у зградама образовних установа у Србији са утицајем на здравље (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-42008)
DOI: 10.2298/TSCI170920160B
ISSN: 0354-9836
WoS: 000460088000032
Scopus: 2-s2.0-85057115153
Колекције
Институција/група
Mašinski fakultetTY - JOUR AU - Bajc, Tamara AU - Banjac, Miloš AU - Todorović, Maja AU - Stevanović, Zana Z. PY - 2019 UR - https://machinery.mas.bg.ac.rs/handle/123456789/3143 AB - The paper presents an experimental analysis of the relationship between local thermal comfort and productivity loss in classrooms. The experimental investigation was performed in a real university classroom during the winter semester in city of Belgrade. Measurements were taken for four scenarios, with different indoor comfort conditions. Variations were made by setting the central heating system on/off, adding an additional heat source to provoke higher indoor temperatures, and measuring the radiant asymmetry impact. Innovative questionnaires were developed especially for the research, in order to investigate students' subjective feelings about local thermal comfort and indoor environmental quality Local predicted mean vote and predicted percentage dissatisfied indices were calculated using data measured in situ. The results were compared to existing models recommended in literature and European and ASHRAE standards. Student productivity was evaluated using novel tests, designed to fit the purposes of the research. Surveys were conducted for 19 days under different thermal conditions, during lectures in a real classroom, using a sample of 240 productivity test results in total. Using the measured data, new correlations between the predicted mean vote, CO2, personal factor and productivity loss were developed. The research findings imply that local thermal comfort is an important factor that can impact productivity, but the impact of the personal factor is of tremendous importance, together with CO2 concentration in the classroom. PB - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd T2 - Thermal Science T1 - Experimental and statistical survey on local thermal comfort impact on working productivity loss in university classrooms EP - 392 IS - 1 SP - 379 VL - 23 DO - 10.2298/TSCI170920160B ER -
@article{ author = "Bajc, Tamara and Banjac, Miloš and Todorović, Maja and Stevanović, Zana Z.", year = "2019", abstract = "The paper presents an experimental analysis of the relationship between local thermal comfort and productivity loss in classrooms. The experimental investigation was performed in a real university classroom during the winter semester in city of Belgrade. Measurements were taken for four scenarios, with different indoor comfort conditions. Variations were made by setting the central heating system on/off, adding an additional heat source to provoke higher indoor temperatures, and measuring the radiant asymmetry impact. Innovative questionnaires were developed especially for the research, in order to investigate students' subjective feelings about local thermal comfort and indoor environmental quality Local predicted mean vote and predicted percentage dissatisfied indices were calculated using data measured in situ. The results were compared to existing models recommended in literature and European and ASHRAE standards. Student productivity was evaluated using novel tests, designed to fit the purposes of the research. Surveys were conducted for 19 days under different thermal conditions, during lectures in a real classroom, using a sample of 240 productivity test results in total. Using the measured data, new correlations between the predicted mean vote, CO2, personal factor and productivity loss were developed. The research findings imply that local thermal comfort is an important factor that can impact productivity, but the impact of the personal factor is of tremendous importance, together with CO2 concentration in the classroom.", publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd", journal = "Thermal Science", title = "Experimental and statistical survey on local thermal comfort impact on working productivity loss in university classrooms", pages = "392-379", number = "1", volume = "23", doi = "10.2298/TSCI170920160B" }
Bajc, T., Banjac, M., Todorović, M.,& Stevanović, Z. Z.. (2019). Experimental and statistical survey on local thermal comfort impact on working productivity loss in university classrooms. in Thermal Science Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 23(1), 379-392. https://doi.org/10.2298/TSCI170920160B
Bajc T, Banjac M, Todorović M, Stevanović ZZ. Experimental and statistical survey on local thermal comfort impact on working productivity loss in university classrooms. in Thermal Science. 2019;23(1):379-392. doi:10.2298/TSCI170920160B .
Bajc, Tamara, Banjac, Miloš, Todorović, Maja, Stevanović, Zana Z., "Experimental and statistical survey on local thermal comfort impact on working productivity loss in university classrooms" in Thermal Science, 23, no. 1 (2019):379-392, https://doi.org/10.2298/TSCI170920160B . .