首页|Effects of native vegetation on winter thermal performance on extensive green roofs in two different areas (Tokyo and Ishikawa) in Japan

Effects of native vegetation on winter thermal performance on extensive green roofs in two different areas (Tokyo and Ishikawa) in Japan

扫码查看
原文链接
  • NSTL
Vegetation plays a key role in many of the ecosystem services provided by green roofs. Green roofs reduce die amount of heat flux through the building envelope but most existing research has focused on hot season cooling functions and not on cold season benefits which can also result in building energy savings. This study examined the effect of different types of native vegetation on heat flux during winter conditions in two locations with different climates in Japan. We established replicated trays (modular green roof system; n = 5 per treatment) with five monoculture treatments and one plant species mixture treatment and an unplanted control treatment on rooftops in Ishikawa and Tokyo. Each tray was fitted with a heat flux sensor at its base and heat flux values were logged every 30 min from December 2015 to March 2016. There were no significant differences in heat flux between the sites for the unplanted controls, indicating that the tray and soil behaved similarly at both sites, however, the relative impact of the different vegetation types was not consistent across the sites. The Tokyo location had more sun and less snow and plants that had relatively low heat flux in Ishikawa showed the opposite pattern in Tokyo. This is consistent with other studies that suggest that in winter conditions with frequent sunny conditions, plants can result in lower energy savings than unplanted controls. Thus, this result addressed the importance of selecting plants in consideration of climate to optimize energy saving with green roofs.

Native plantsInsulationHeat flux

Ayako Nagase、Toshihiko Momose、Jeremy Lundholm

展开 >

Graduate School of Global and Transdisciplinary studies, Chiba University, 1-33, Yayoicho, Inage-ku, Chiba City, Chiba 263-8522, Japan

Department of Environmental Science, Ishikawa Prefectural University, 1-308 Suematsu, Nonoichi City, Ishikawa 921-8836, Japan

Department of Biology, Saint Mary's University, 923 Robie St, Halifax, NS B3H 3C3, Canada

2022

10.1016/j.ecoleng.2022.106707

Ecological engineering

Ecological engineering

EISCI
ISSN：0925-8574
年,卷(期)：2022.182
  • 1
  • 33