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Measuring the human body’s micro‐climate using a thermal manikin (2014)
Völker, Conrad ; Mämpel, Silvio ; Kornadt, Oliver
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.
Thermische Behaglichkeit in Gebäuden –thermophysiologische Beschreibung des Menschen unter besonderer Berücksichtigung des Blutkreislaufs und verschiedener thermischer Komfortkriterien (2008)
Mämpel, Silvio
Dokumentation einer numerischen Simulation zur Beschreibung der Behaglichkeit des menschlichen Körpers in Gebäuden. Es wurde speziell auf den im Modell vorhandenen Blutkreislauf sowie auf die Implementierten Komfortindikatoren eingegangen.
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