TY  - JOUR
A1  - Gena, Amayu Wakoya
A1  - Völker, Conrad
A1  - Settles, Gary
T1  - Qualitative and quantitative schlieren optical measurement of the human thermal plume
JF  - Indoor Air
N2  - A new large‐field, high‐sensitivity, single‐mirror coincident schlieren optical instrument has been installed at the Bauhaus‐Universität Weimar for the purpose of indoor air research. Its performance is assessed by the non‐intrusive measurement of the thermal plume of a heated manikin. The schlieren system produces excellent qualitative images of the manikin's thermal plume and also quantitative data, especially schlieren velocimetry of the plume's velocity field that is derived from the digital cross‐correlation analysis of a large time sequence of schlieren images. The quantitative results are compared with thermistor and hot‐wire anemometer data obtained at discrete points in the plume. Good agreement is obtained, once the differences between path‐averaged schlieren data and planar anemometry data are reconciled.
KW  - Raumklima
KW  - Behaglichkeit
KW  - Digital image correlation
KW  - human thermal plume
KW  - schlieren imaging
KW  - schlieren velocimetry
KW  - thermal comfort
KW  - Schlierenspiegel
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20200709-41936
UR  - https://onlinelibrary.wiley.com/doi/full/10.1111/ina.12674
VL  - 2020
IS  - volume 30, issue 4
SP  - 757
EP  - 766
PB  - John Wiley & Sons
ER  - 
TY  - JOUR
A1  - Gallo, Emmanuelle
T1  - Räumliche und soziale Strategie zur Sicherung des Wärmekomforts
N2  - Wissenschaftliches Kolloquium vom 27. bis 30. Juni 1989 in Weimar an der Hochschule für Architektur und Bauwesen zum Thema: ‚Produktivkraftentwicklung und Umweltgestaltung. Sozialer und wissenschaftlich-technischer Fortschritt in ihren Auswirkungen auf Architektur und industrielle Formgestaltung in unserer Zeit. Zum 100. Geburtstag von Hannes Meyer'
T3  - Wissenschaftliche Zeitschrift / Hochschule für Architektur und Bauwesen <Weimar> - 36.1990,1-3/127-128 
KW  - Raumklima
KW  - Behaglichkeit
KW  - Bauhaus-Kolloquium
KW  - Weimar
KW  - 1989
Y1  - 1990
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-10740
ER  - 
TY  - JOUR
A1  - Alsaad, Hayder
A1  - Völker, Conrad
T1  - Performance evaluation of ductless personalized ventilation in comparison with desk fans using numerical simulations
JF  - Indoor Air
N2  - The performance of ductless personalized ventilation (DPV) was compared to the performance of a typical desk fan since they are both stand-alone systems that allow the users to personalize their indoor environment. The two systems were evaluated using a validated computational fluid dynamics (CFD) model of an office room occupied by two users. To investigate the impact of DPV and the fan on the inhaled air quality, two types of contamination sources were modelled in the domain: an active source and a passive source. Additionally, the influence of the compared systems on thermal comfort was assessed using the coupling of CFD with the comfort model developed by the University of California, Berkeley (UCB model). Results indicated that DPV performed generally better than the desk fan. It provided better thermal comfort and showed a superior performance in removing the exhaled contaminants. However, the desk fan performed better in removing the contaminants emitted from a passive source near the floor level. This indicates that the performance of DPV and desk fans depends highly on the location of the contamination source. Moreover, the simulations showed that both systems increased the spread of exhaled contamination when used by the source occupant.
KW  - Behaglichkeit
KW  - Raumklima
KW  - Strömungsmechanik
KW  - Fluid
KW  - computational fluid dynamics
KW  - desk fan
KW  - ductless personalized ventilation
KW  - IAQ
KW  - thermal comfort
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20200422-41407
UR  - https://onlinelibrary.wiley.com/doi/full/10.1111/ina.12672
VL  - 2020
PB  - John Wiley & Sons Ltd
ER  -