TY - JOUR
T1 - Black globe free convection measurement error potentials
AU - Teitelbaum, Eric
AU - Pantelic, Jovan
AU - Rysanek, Adam
AU - Chen, Kian Wee
AU - Meggers, Forrest
N1 - Funding Information:
We thank all of the staff and researchers involved in this project, particularly the facilities staff at United World College Southeast Asia for the support in kind of our radiant cooling experiments in the tropics.
Publisher Copyright:
© 2019 Society for Modeling & Simulation International (SCS).
PY - 2019
Y1 - 2019
N2 - For thermal comfort research, black globes have become the de facto tool for mean radiant temperature, TM RT, measurement. They provide a quick, cheap means to survey the radiant environment in a space with nearly a century of trials to reassure researchers. However, as more complexity is introduced to built environments, particularly by engineering spaces to separate radiative and convective modes of heat transfer for energy efficiency and comfort, we must reassess the relationship of globe readings in the context of their environments. In particular, corrections for globe readings taking wind into account [1, 4] rely on a forced convection heat transfer coefficient. The simulation proposed in this paper demonstrates the influence of free convection on the instrument’s readings. Initial studies show that the TM RT and air temperature separations of 2 K could introduce errors equivalent to 0.1 m/s of air velocity, providing an additional mechanism for globe readings to track air temperatures.
AB - For thermal comfort research, black globes have become the de facto tool for mean radiant temperature, TM RT, measurement. They provide a quick, cheap means to survey the radiant environment in a space with nearly a century of trials to reassure researchers. However, as more complexity is introduced to built environments, particularly by engineering spaces to separate radiative and convective modes of heat transfer for energy efficiency and comfort, we must reassess the relationship of globe readings in the context of their environments. In particular, corrections for globe readings taking wind into account [1, 4] rely on a forced convection heat transfer coefficient. The simulation proposed in this paper demonstrates the influence of free convection on the instrument’s readings. Initial studies show that the TM RT and air temperature separations of 2 K could introduce errors equivalent to 0.1 m/s of air velocity, providing an additional mechanism for globe readings to track air temperatures.
KW - Black globe
KW - Mean radiant temperature
KW - Measurement protocol
KW - Sensors
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M3 - Conference article
AN - SCOPUS:85081542057
SN - 0735-9276
VL - 51
SP - 143
EP - 146
JO - Simulation Series
JF - Simulation Series
IS - 8
T2 - 10th Annual Symposium on Simulation for Architecture and Urban Design, SimAUD 2019
Y2 - 7 April 2019 through 9 April 2019
ER -