Air-conditioning control using indoor CO<sub>2</sub> and total volatile organic compounds for preventing sick building syndrome and energy conservation

DOI Web Site Web Site 1 References
  • MIZUKOSHI Atsushi
    Department of Environmental Medicine and Behavioral Science, Kinki University Faculty of Medicine
  • NOGUCHI Miyuki
    Department of Materials and Life Science, Seikei University Faculty of Science and Technology
  • YAMAMOTO Soichiro
    Environmental Engineering Department, Technology Division, Mitsui Fudosan Architectural Engineering
  • KAWAKAMI Risa
    Center for Sophisticated Space and Facility Engineering, Institute of Technology, Shimizu Corporation
  • OTSUKA Toshihiro
    Center for Sophisticated Space and Facility Engineering, Institute of Technology, Shimizu Corporation
  • YAMAGUCHI Makoto
    Center for Sophisticated Space and Facility Engineering, Institute of Technology, Shimizu Corporation
  • YANAGISAWA Yukio
    The University of Tokyo

Bibliographic Information

Other Title
  • 省エネルギーとシックビル対策を配慮した室内CO<sub>2</sub>及びTVOC濃度を指標とする空調制御の検討
  • 省エネルギーとシックビル対策を配慮した室内CO₂及びTVOC濃度を指標とする空調制御の検討
  • ショウエネルギー ト シックビル タイサク オ ハイリョ シタ シツナイ CO ₂ オヨビ TVOC ノウド オ シヒョウ ト スル クウチョウ セイギョ ノ ケントウ

Search this article

Abstract

In office buildings, indoor air quality is managed on the basis of an indoor CO2 concentration of 1000ppm or less under the Maintenance of Sanitation in Buildings Act. However, in recent years there have been growing concerns about sick building syndrome, caused by unregulated volatile organic compounds (VOCs) that are not included in the list of indoor concentration guideline compounds defined by the Ministry of Health, Labour and Welfare of Japan. Therefore, the importance of managing indoor total VOC (TVOC) concentration is being recognized. Energy conservation in office buildings is also an important issue, and reducing air conditioning loads by controlling the amount of introduced outdoor air is one promising approach. The objective of this study is to verify the energy conservation potential of air-conditioning control, using indoor CO2 and TVOC concentrations as indicators. We conducted a simulation experiment in an office space in which people were not present and made long-term measurements in actual work environments. The simulation results showed that CO2 concentration increased as the amount of introduced outdoor air decreased, when supply air was introduced normally. However, following the reduction of the supply air, CO2 concentration distribution was generated. Additionally, long-term measurements made in actual work environments showed differing trends in CO2 and TVOC fluctuations. This result indicates the necessity of using two indicators to manage indoor air quality. We estimated the amount of outdoor air introduced by controlling air conditioning based on regulation values 400 μg/m3 for TVOC and 1000ppm for CO2, and this amount could have been reduced by 43% of set value of the amount of introduced outdoor air. Consequently, in buildings with low VOC emissions, it is possible that the amount of introduced outdoor air can be reduced by monitoring CO2 and TVOC concentrations, thereby contributing to energy conservation.

Journal

  • Indoor Environment

    Indoor Environment 18 (1), 3-14, 2015

    Society of Indoor Environment, Japan

References(1)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top