@article{VoelkerMaempelKornadt, author = {V{\"o}lker, Conrad and M{\"a}mpel, Silvio and Kornadt, Oliver}, title = {Measuring the human body's micro-climate using a thermal manikin}, series = {Indoor Air}, journal = {Indoor Air}, number = {24, 6}, doi = {10.25643/bauhaus-universitaet.3815}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20181025-38153}, pages = {567 -- 579}, abstract = {The human body is surrounded by a micro-climate which results from its convective release of heat. In this study, the air temperature and flow velocity of this micro-climate were measured in a climate chamber at various room temperatures, using a thermal manikin simulating the heat release of the human being. Different techniques (Particle Streak Tracking, thermography, anemometry, and thermistors) were used for measurement and visualization. The manikin surface temperature was adjusted to the particular indoor climate based on simulations with a thermoregulation model (UCBerkeley Thermal Comfort Model). We found that generally, the micro-climate is thinner at the lower part of the torso, but expands going up. At the head, there is a relatively thick thermal layer, which results in an ascending plume above the head. However, the micro-climate shape strongly depends not only on the body segment, but also on boundary conditions: the higher the temperature difference between the surface temperature of the manikin and the air temperature, the faster the air flow in the micro-climate. Finally, convective heat transfer coefficients strongly increase with falling room temperature, while radiative heat transfer coefficients decrease. The type of body segment strongly influences the convective heat transfer coefficient, while only minimally influencing the radiative heat transfer coefficient.}, subject = {Raumklima}, language = {en} } @phdthesis{Kuhne1998, author = {Kuhne, Michael}, title = {Modellierung des Energietransports durch Verglasungen}, doi = {10.25643/bauhaus-universitaet.43}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20040220-458}, school = {Bauhaus-Universit{\"a}t Weimar}, year = {1998}, abstract = {Es werden sowohl analytische als auch numerische Verfahren zur Berechnung der W{\"a}rmeverluste von Verglasungen vorgestellt, wobei alle am Energietransport beteiligten Prozesse, die W{\"a}rmeleitung, die thermisch getriebenen Konvektionsstr{\"o}mungen und die infrarote Strahlungswechselwirkung, korrekt und vollst{\"a}ndig ber{\"u}cksichtigt werden. Mit Hilfe numerischer Str{\"o}mungssimulation werden Verglasungen systematisch hinsichtlich der F{\"u}llgasart, der Infrarotverspiegelung, der Einbaulage und des Scheibenabstandes sowie der Anzahl der Gaszwischenr{\"a}ume (Zwei-, Drei- und Vierscheiben-Verglasung) untersucht und verglichen. Die Abh{\"a}ngigkeit des k-Wertes von den Temperaturen der angrenzenden Klimate (Atmosph{\"a}re und Innenraum) wird dargestellt.}, subject = {Verglasung}, language = {de} }