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Development of Highly Retro-reflective Building Outer Skin

Research Project

Project/Area Number 18K04436
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 23010:Building structures and materials-related
Research InstitutionOsaka City University

Principal Investigator

Emura Kazuo  大阪市立大学, 大学院生活科学研究科, 教授 (60138972)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords反射率 / 再帰反射 / 簡易施工 / 鏡面反射 / 屈折率 / ビーズ / 外皮 / 施工
Outline of Final Research Achievements

The specific purpose of this research is to realize how to single-layer reflective beads uniformly and adhere them to the substrate, to provide durability, and to maintain the function of the adhered reflective beads for a long time.
In this study, the temperature of the base adhesive was controlled up to 100 degrees to soften the base adhesive and allow the laminated beads to sink and adhere single-layered and uniformly. In terms of durability and weather resistance, the beads were covered with existing healthy high-permeability glass at the surface and confined to the substrate with normal wall sealant. Exposure within a period of time confirmed a certain level of durability.

Academic Significance and Societal Importance of the Research Achievements

地球温暖化や都市部のヒートアイランド現象による都市キャニオン空間の酷暑環境緩和には、日射など外界からの熱放射の遮熱が有効であり、同時に、反射型遮熱では、入射方向への再帰反射にこそ意味がある。現状のビーズ型再帰機能反射素材は、プリズム型のそれに比べれば安価ではあるものの、既存外皮と比べれば高価でかつ耐久性は未確認である。今回の簡易施工法は、安価な施工法でもあり、再帰反射機能も維持できているため、簡易化の端緒にはなりえたと考える。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2021 2020 2019

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Proposal to Refine Solar Radiation of Typical Meteorological Year Database and Evaluation on the Influence of Air-conditioning Load2021

    • Author(s)
      Jihui Yuan, Kazuo Emura, Craig Farnham
    • Journal Title

      Atmosphere

      Volume: 12 Issue: 4 Pages: 524-541

    • DOI

      10.3390/atmos12040524

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluation of retro-reflective properties and upward to downward reflection ratio of glass bead retro-reflective material using a numerical model2021

    • Author(s)
      Jihui Yuan, Kazuo Emura, Craig Farnham
    • Journal Title

      Urban Climate

      Volume: 36 Pages: 100774-100785

    • DOI

      10.1016/j.uclim.2021.100774

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Analytical model to evaluate the reflective directional characteristics of retro-reflective materials2020

    • Author(s)
      Jihui Yuan, Kazuo Emura, Craig Farnham
    • Journal Title

      Energy & Buildings

      Volume: 223 Pages: 110169-110169

    • DOI

      10.1016/j.enbuild.2020.110169

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Performance of retro-reflective building envelope materials with fixed glass beads2019

    • Author(s)
      Jihui Yuan, Craig Farnham, Kazuo Emura
    • Journal Title

      Applied Science

      Volume: 印刷中

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 建物外皮の日射反射特性が周辺気温及び建物空調負荷に及ぼす影響2019

    • Author(s)
      北風晴都、袁継輝、山中俊夫、小林知広、永村一雄
    • Organizer
      空気調和・衛生工学会近畿支部学術研究発表会論文集
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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