Modification of Human-Biometeorologically Significant Radiant Flux Densities by Shading as Local Method to Mitigate Heat Stress in Summer within Urban Street Canyons
Lee, Hyunjung ; Holst, Jutta LU
and Mayer, Helmut
(2013)
In Advances in Meteorology
- Abstract
- Increasing heat will be a significant problem for Central European cities in the future. Shading devices are discussed as a method to mitigate heat stress on citizens. To analyze the physical processes, which are characteristic of shading in terms of urban human-biometeorology, experimental investigations on the thermal effects of shading by a building and shading by tree canopies were conducted in Freiburg (Southwest Germany) during typical Central European summer weather. Urban human-biometeorology stands for the variables air temperature T-a, mean radiant temperature T-mrt, and physiologically equivalent temperature PET, that is the human-biometeorological concept to assess the thermal environment which was applied. The measuring setup... (More)
- Increasing heat will be a significant problem for Central European cities in the future. Shading devices are discussed as a method to mitigate heat stress on citizens. To analyze the physical processes, which are characteristic of shading in terms of urban human-biometeorology, experimental investigations on the thermal effects of shading by a building and shading by tree canopies were conducted in Freiburg (Southwest Germany) during typical Central European summer weather. Urban human-biometeorology stands for the variables air temperature T-a, mean radiant temperature T-mrt, and physiologically equivalent temperature PET, that is the human-biometeorological concept to assess the thermal environment which was applied. The measuring setup consists of specific human-biometeorological stations, which enable the direct or indirect determination of T-a, T-mrt, and PET. With respect to both shading devices, the T-a reduction did not exceed 2 C, while PET as a measure for human heat stress was lowered by two thermal sensation steps according to the ASHRAE scale. As T-mrt has the role of a key variable for outdoor thermal comfort during Central European summer weather, all radiant flux densities relevant to the determination of T-mrt were directly measured and analyzed in detail. The results show the crucial significance of the horizontal radiant flux densities for T-mrt and consequently PET. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3979344
- author
- Lee, Hyunjung
; Holst, Jutta
LU
and Mayer, Helmut
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Advances in Meteorology
- article number
- 312572
- publisher
- Hindawi Limited
- external identifiers
-
- wos:000321637900001
- scopus:84880102308
- ISSN
- 1687-9309
- DOI
- 10.1155/2013/312572
- language
- English
- LU publication?
- yes
- id
- 17f5a38c-912b-4160-a3b0-0f1e5ced76a1 (old id 3979344)
- date added to LUP
- 2016-04-01 10:34:24
- date last changed
- 2022-04-27 23:20:53
@article{17f5a38c-912b-4160-a3b0-0f1e5ced76a1,
abstract = {{Increasing heat will be a significant problem for Central European cities in the future. Shading devices are discussed as a method to mitigate heat stress on citizens. To analyze the physical processes, which are characteristic of shading in terms of urban human-biometeorology, experimental investigations on the thermal effects of shading by a building and shading by tree canopies were conducted in Freiburg (Southwest Germany) during typical Central European summer weather. Urban human-biometeorology stands for the variables air temperature T-a, mean radiant temperature T-mrt, and physiologically equivalent temperature PET, that is the human-biometeorological concept to assess the thermal environment which was applied. The measuring setup consists of specific human-biometeorological stations, which enable the direct or indirect determination of T-a, T-mrt, and PET. With respect to both shading devices, the T-a reduction did not exceed 2 C, while PET as a measure for human heat stress was lowered by two thermal sensation steps according to the ASHRAE scale. As T-mrt has the role of a key variable for outdoor thermal comfort during Central European summer weather, all radiant flux densities relevant to the determination of T-mrt were directly measured and analyzed in detail. The results show the crucial significance of the horizontal radiant flux densities for T-mrt and consequently PET.}},
author = {{Lee, Hyunjung and Holst, Jutta and Mayer, Helmut}},
issn = {{1687-9309}},
language = {{eng}},
publisher = {{Hindawi Limited}},
series = {{Advances in Meteorology}},
title = {{Modification of Human-Biometeorologically Significant Radiant Flux Densities by Shading as Local Method to Mitigate Heat Stress in Summer within Urban Street Canyons}},
url = {{http://dx.doi.org/10.1155/2013/312572}},
doi = {{10.1155/2013/312572}},
year = {{2013}},
}