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Different Methods for Estimating the Mean Radiant Temperature in an Outdoor Urban Setting by Sofia Thorsson; Fredrik Lindberg; Ingegärd Eliasson; Björn Holmer is a Environmental Science article available to read on EtoBox.

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## Abstract The mean radiant temperature (T~mrt~) is one of the most important meteorological parameters governing human energy balance. In this paper, three different methods of obtaining the T~mrt~ in an outdoor urban setting are compared. Method A is based on integral radiation measurements and angular factors, method B is based on measurements with a 38‐mm flat grey globe thermometer and in method C makes use of the Rayman 1.2 software is used. Measurements were performed in a large open square in a high latitude city—Göteborg, Sweden—during clear to overcast weather conditions in October 2005 and in July and August 2006. Results show that the difference between Method A and Method B was generally relatively small. Most of the discrepancy, caused by rapid changes in radiation, temperature and wind speed was smoothed out using 5 min mean values. By systematically and empirically changing the mean convection coefficient, the accuracy of Method B was improved and a new equation expressing the T~mrt~ was obtained. With this new equation the 38 mm flat grey globe thermometer could successfully be used to estimate the T~mrt~ in an outdoor urban setting provided that the wind speed an

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Author

Sofia Thorsson; Fredrik Lindberg; Ingegärd Eliasson; Björn Holmer

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0899-8418)

Published

2007

Language

EN

Field

Environmental Science (Physical Sciences)