Browsing TKD - Institutt for bygg- og energiteknikk by Author "Mysen, Mads"
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Demand-controlled ventilation in schools: Influence of base ventilation rates on subjective symptoms, perceived indoor environment and young adults' learning performance
Holøs, Sverre Bjørn; Yang, Aileen; Thunshelle, Kari; Mysen, Mads (SINTEF Proceedings;9, Conference object, 2021)The ventilation airflow rates in a demand-controlled ventilation strategy typically vary between a base (Vmin) and a maximum ventilation rate (Vmax). Classrooms have relatively short but intense hours of occupancy and a ... -
Demand-controlled ventilation: do different user groupsrequire different CO2-setpoints?
Haugland, Martine Borgen; Yang, Aileen; Holøs, Sverre Bjørn; Thunshelle, Kari; Mysen, Mads (IOP Conference Series: Materials Science and Engineering;Volume 609, Journal article; Peer reviewed, 2019)The aim of this study is to investigate whether children's bioeffluent generation rate is proportional to their carbon dioxide (CO2) generation rate. Consequently, to assess if there is a need to differentiate the CO2- ... -
Effect of filter type in ventilation systems on NO2 concentrations in classrooms
Yang, Aileen; Nikolaisen, Kristian Fredrik; Holøs, Sverre Bjørn; Thunshelle, Kari; Dauge, Franck Rene; Mysen, Mads (Springer Proceedings in Energy;Cold Climate HVAC 2018 - Sustainable Buildings in Cold Climates, Conference object, 2018-12-12)This study was conducted to assess how different filter types in the ventilation system affect the indoor NO2 concentrations. Measurements were carried out in two classrooms and air intakes in a primary school located in ... -
Effect of ventilation on perceived air quality in 18 classrooms
Holøs, Sverre Bjørn; Yang, Aileen; Thunshelle, Kari; Mysen, Mads (IOP Conference Series: Materials Science and Engineering;Volume 609, Journal article; Peer reviewed, 2019)The aim of this paper is to assess whether reducing the minimum ventilation airflow rate (Vmin) has any negative impacts on perceived air quality (PAQ) upon entering an unoccupied room. Seventeen healthy young adults were ... -
How Does Low Relative Humidity Affect Perceived Air Quality, Thermal Comfort and Symptoms in Modern Office Buildings in Cold Climates?
Lind, Merethe; Holøs, Sverre Bjørn; Thunshelle, Kari; Yang, Aileen; Mysen, Mads (Springer Proceedings in Energy;Cold Climate HVAC 2018 - Sustainable Buildings in Cold Climates, Conference object, 2018-12-12)To assess how people are influenced by relative humidity (RH) in cold climates, a study was conducted in an open office landscape in Oslo, Norway. The study took place during three cold days in February 2017. Fourteen ... -
Performance assessment of all-air heating in an office cubicle equipped with an active supply diffuser in a cold climate
Rabani, Mehrdad; Madessa, Habtamu Bayera; Nord, Natasa; Schild, Peter; Mysen, Mads (Building and Environment;Volume 156, June 2019, Pages 123-136, Journal article; Peer reviewed, 2019-04-12)Low-temperature space heating systems play a prominent role in improving the indoor air quality (IAQ) and thermal comfort of energy efficient buildings in cold-climate countries such as Norway. All-air heating (AAH) systems ... -
Should we differentiate ventilation requirements for different user groups?
Holand, Nora; Yang, Aileen; Holøs, Sverre Bjørn; Thunshelle, Kari; Mysen, Mads (Springer Proceedings in Energy;Cold Climate HVAC 2018 - Sustainable Buildings in Cold Climates, Conference object, 2018-12-12)The aim of our study is to investigate whether it is necessary to adjust the venti-lation requirements according to different user groups. This study is focusing es-pecially on teenagers, who might have a higher odour load ... -
Temperature-dependent ventilation rates might improve perceived air quality in a demand-controlled ventilation strategy
Yang, Aileen; Holøs, Sverre Bjørn; Opsahl Resvoll, Marie; Mysen, Mads; Fjellheim, Øystein (Building and Environment;Volume 205, November 2021, 108180, Peer reviewed; Journal article, 2021-07-24)The aim of the Best Vent project was to find the optimal control strategy for demand-controlled ventilation (DCV) without compromising on indoor air quality. In this paper, we discuss control strategies that would ensure ... -
VOC emission rates in newly built and renovated buildings, and the influence of ventilation – a review and meta-analysis
Holøs, Sverre Bjørn; Yang, Aileen; Lind, Merethe; Thunshelle, Kari; Schild, Peter; Mysen, Mads (The International Journal of Ventilation;, Journal article; Peer reviewed, 2018-02-20)Few field studies have evaluated ventilation strategies, such as temporarily increasing the ventilation rate, to counter the high pollutant-load from off-gassing of volatile compounds from new materials in these buildings. ... -
What should the Minimum Ventilation Rate Be in a Demand-Controlled Ventilation Strategy?
Mysen, Mads; Holøs, Sverre Bjørn; Yang, Aileen; Thunshelle, Kari; Schild, Peter (Springer Proceedings in Energy;CCC 2018: Cold Climate HVAC 2018, Conference object, 2019)Demand-Controlled Ventilation is emerging as a dominant ventilation strategy in non-residential buildings in Norway. The ventilation airflow rate is controlled between pre-set minimum (Vmin) and maximum (Vmax) values, based ...