TY - GEN
T1 - Reliable methodology to monitor and assess radiant environments
AU - Hatefnia, Navid
AU - Barakati, Amir
AU - Ghobad, Marjan
AU - Panah, Azar Eslam
N1 - Publisher Copyright:
Copyright © NCEUB 2017.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2017
Y1 - 2017
N2 - An accurate assessment of thermal comfort allows in-time adjustments in design that leads to achieve a more pleasant indoor or outdoor environment. Among the factors that influence human thermal comfort, Mean Radiant Temperature (MRT) is the focus of the present paper. This work proposes a methodology to facilitate the process of recording, measuring and post-processing of MRT. Current techniques used to estimate MRT in urban environments have several challenges among which accuracy and settling time are the major issues. Moreover, the only output is a single value for MRT without the possibility of sensitivity analysis on effective parameters. The method proposed in this paper, called Radiant Ambience Imaging, is established based on two main techniques: thermography and Numerous Vector (NV) numerical method. The MRT is assessed by capturing infrared and HDR images from a polished hemisphere followed by the numerical analysis. The results not only include the value for the MRT at the point of interest but also the share of each radiant object. The process relies merely on electromagnetic radiation fluxes and there is no need for wind effect corrections. It also provides data post-processing to help architects optimize their designs in order to control MRT in practical applications.
AB - An accurate assessment of thermal comfort allows in-time adjustments in design that leads to achieve a more pleasant indoor or outdoor environment. Among the factors that influence human thermal comfort, Mean Radiant Temperature (MRT) is the focus of the present paper. This work proposes a methodology to facilitate the process of recording, measuring and post-processing of MRT. Current techniques used to estimate MRT in urban environments have several challenges among which accuracy and settling time are the major issues. Moreover, the only output is a single value for MRT without the possibility of sensitivity analysis on effective parameters. The method proposed in this paper, called Radiant Ambience Imaging, is established based on two main techniques: thermography and Numerous Vector (NV) numerical method. The MRT is assessed by capturing infrared and HDR images from a polished hemisphere followed by the numerical analysis. The results not only include the value for the MRT at the point of interest but also the share of each radiant object. The process relies merely on electromagnetic radiation fluxes and there is no need for wind effect corrections. It also provides data post-processing to help architects optimize their designs in order to control MRT in practical applications.
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M3 - Conference contribution
AN - SCOPUS:85056637963
T3 - Proceedings of 33rd PLEA International Conference: Design to Thrive, PLEA 2017
SP - 1092
EP - 1099
BT - Proceedings of 33rd PLEA International Conference
A2 - Brotas, Luisa
A2 - Roaf, Sue
A2 - Nicol, Fergus
PB - NCEUB 2017 - Network for Comfort and Energy Use in Buildings
T2 - 33rd International on Passive and Low Energy Architecture Conference: Design to Thrive, PLEA 2017
Y2 - 2 July 2017 through 5 July 2017
ER -