Browsing NTNU Open by Author "Lassen, Niels"
Now showing items 1-8 of 8
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Case study of personal heaters in a Plus energy building – Simulations of potential energy savings and results from a field test
Lassen, Niels (Journal article; Peer reviewed, 2019)Personal Comfort Systems (PCS) for heating, such as foot warmers, heated chairs and infrared heaters, can compensate for a lowering of up to 10°C in ambient temperatures in a heating situation. They are found to lead to a ... -
Continuous data-streams for occupant feedback on indoor climate: Theoretical and experimental analysis of concepts, methods and systems for real-life implementation
Lassen, Niels (Doctoral theses at NTNU;2021:129, Doctoral thesis, 2021)One of the main purposes of a building is to provide a healthy, productive, and comfortable indoor environment. Both conventional and modern “smart” buildings can be said to fall short of this ideal. The fields of research ... -
Design and in-field testing of a multi-level system for continuous subjective occupant feedback on indoor climate
Lassen, Niels; Josefsen, Terje; Goia, Francesco (Peer reviewed; Journal article, 2020)Information gaps between the building and the occupant often lead to sub-optimal building performance, impairing the efforts towards more sustainable buildings. New information and communication technology creates new ... -
Enabling holistic design for high energy efficient office buildings through the use of subjective occupant feedback
Lassen, Niels; Hegli, Tine; Dokka, Tor Helge; Løvold, Terje; Edwards, Kristian; Goia, Francesco; Andresen, Inger (Peer reviewed; Journal article, 2021)Today’s high-performance buildings answer to a large and growing number of quantitative performance criteria. Performance gaps between design and actual performance have however been identified as a significant challenge ... -
Experimental setup and testing of an in-field system for real- time occupant feedback
Lassen, Niels; Josefsen, Terje (Journal article; Peer reviewed, 2019)Thermal comfort and air quality in buildings have been found to be the 2nd and 5th largest sources of complaints among occupants in modern office buildings. In building operation, the determination of control set-points ... -
Field investigations of a smiley-face polling station for recording occupant satisfaction with indoor climate
Lassen, Niels; Goia, Francesco; Schiavon, Stefano; Pantelic, Jovan (Peer reviewed; Journal article, 2020)The use of smiley-face polling stations has had a rapid growth as a means of automatically and efficiently collecting user satisfaction verdicts in airports, restrooms, museums, and retail. Their advantages are that they ... -
Information match between continuous occupant data streams and one-time manual surveys on indoor climate
Lassen, Niels; Møller, Jan Kloppenborg; Goia, Francesco (Peer reviewed; Journal article, 2021)Occupant-centric data streams, and more specifically continuous subjective occupant feedback (CSOF) systems, offer the possibility for autonomous collection of occupant feedback in buildings. They are made possible by ... -
A theoretical framework for classifying occupant-centric data streams on indoor climate using a physiological and cognitive process hierarchy
Lassen, Niels; Goia, Francesco (Peer reviewed; Journal article, 2021)New and pervasive information and communication technologies have made it possible to capture a large range of continuous data from, or close to, each individual building occupant. These occupant-centric data streams may ...