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Title: Relationship between Environmental Conditions and Algal Growth on the Exterior Walls of the Ninna-ji Temple, Kyoto
Authors: Nakajima, Makiko
Hokoi, Shuichi
Ogura, Daisuke
Iba, Chiemi  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0003-0376-1465 (unconfirmed)
Author's alias: 鉾井, 修一
小椋, 大輔
伊庭, 千恵美
Keywords: Soiling of Wall
Airborne Algae
Solar Radiation
Surface Temperature
L* value
Issue Date: Nov-2015
Publisher: Elsevier Ltd.
Journal title: Energy Procedia
Volume: 78
Start page: 1329
End page: 1334
Abstract: We can find that many building facades are discoloured black and/or green. Some previous studies showed that the soiling of building facades is caused by the growth of airborne algae. The algal growth is strongly influenced by the water supply, including the rain, the condensation, and high humidity. However, the influence of the other environmental factors, such as the solar radiation, the temperature, and the wind on the algal growth, has not been investigated yet. The relationship between the algal growth and the environmental factors on the building facades which the algae grow for long term has not been investigated. Therefore, we quantified the relationship between the algal growth and the environmental factors based on the field survey on the algal growth in Kyoto City and the measurement on the building facades at Kusyo Myojin Shrine, Ninnna-ji Temple in Kyoto, Japan. Kusyo Myojin Shrine was constructed from 1641 to 1647. Some parts of the roof, walls and the painting were repaired from 2004 to 2006. However, the building facades have already been colored black by the algal growth. To investigate the cause of the soiling by the algal growth, the ambient conditions, and surface temperature and humidity of walls were has measured since 2011. The soiling state of the walls was investigated by the L* values and the photographs of the walls. As a result, the order of the L* values of the wall surfaces agreed well with the darkness of the photographs. We concluded that the algal growth and death on the wall surface were affected by the surface temperature of the wall.
Description: 6th International Building Physics Conference, IBPC 2015
Rights: © 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
URI: http://hdl.handle.net/2433/215880
DOI(Published Version): 10.1016/j.egypro.2015.11.149
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