Browsing ODA Open Digital Archive by Author "Thunshelle, Kari"

Now showing items 1-14 of 14

    • Acceptable air velocities using demand-controlled ventilation for individual cooling 

      Thunshelle, Kari; Nordby, Henrik S.; Solberg, Håkon Rikoll; Holøs, Sverre Bjørn; Schild, Peter (E3S Web of Conferences;Volume 172, 2020. 12th Nordic Symposium on Building Physics (NSB 2020). Article Number: 09002, Journal article; Peer reviewed, 2020-06-30)
      One of the main challenges in highly insulated buildings is the increasing share of energy demand for cooling. New solutions for low energy cooling are needed. Individual cooling by demand-controlled ventilation and use ...

    • Benkeventilator kontra veggmontert kjøkkenhette: Eksperimentell dokumentasjon av ytelse 

      Eliassen, Øystein (MAEN;2022, Master thesis, 2022)
      Økende urbanisering fører til mer kompakte, arealeffektive og tettere bygg. Leilighetene har gjerne åpne løsninger, noe som byr på utfordringer til ventilasjonsløsninger. Dette fører til vanskeligheter med å finne ...

    • 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 ...

    • Experimental study comparing recirculating and extracting range hoods in terms of exposure in open kitchen-living rooms 

      Alvestad, Iselin (MAEN;2022, Master thesis, 2022)
      This thesis investigates the challenges by recirculating the air from range hoods compared to extracting it. Two types of range hoods were tested with both recirculation and extraction on different airflow rates while ...

    • 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 ...

    • Impact of Typical Faults Occurring in Demand-controlled Ventilation on Energy and Indoor Environment in a Nordic Climate 

      Andersen, Kamilla Heimar; Holøs, Sverre Bjørn; Yang, Aileen; Thunshelle, Kari; Fjellheim, Øystein; Jensen, Rasmus (E3S Web of Conferences;Volume 172, 09006 (2020, Journal article; Peer reviewed, 2020-06-30)
      This study evaluates typical faults occurring in demand-controlled ventilation (DCV) system and the impact on three output results: energy use, thermal comfort, and indoor air quality. The methodologies used in this study ...

    • Mostly dry: current ventilation practice efficiently limits moisture excess in mechanically ventilated apartments 

      Coskuntuna, Salih Berkay; Kraniotis, Dimitrios; Barnoshian, Siavash; Holøs, Sverre Bjørn; Thunshelle, Kari (CLIMA 2022;The 14th REHVA HVAC World Congress, Conference object, 2022-05-20)
      The current Norwegian building code (TEK 17) requires the new residential buildings to have balanced ventilation with heat recovery, in addition to the strict regulations regarding thermal performance and airtightness of ...

    • 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 ...

    • SvalVent – Biometri og termisk komfort 

      Solberg, Håkon Rikoll (MAEN;2018, Master thesis, 2018)
      Stadig mer av bygningers energibruk går med til kjøling. SvalVent er et pågående forskningsprosjekt som ser på muligheten for å redusere energibruk til kjøling på sommertid ved hjelp av brukerstyrte aktive tilluftsventiler. ...

    • 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 ...