Thermal comfort and productivity for the future HVAC

Shinichi Tanabe*


研究成果: Conference contribution


Office environment is important for office workers because it effects their satisfaction and also productivity. Recently, workers' satisfaction is a focus of attention for office environment easy assessment. On the other hand, the International Energy Agency published latest World Energy Outlook 2013. The global demand for energy will keep rising. Jumping by one-third by 2035. Especially Asia region. Non-OECD Asian countries have more impact on economy and energy until 2035. Low-carbon energy sources will be able to meet around 40 percent of that growth. In Japan the Great East Japan Earthquake on March 11, 2011 caused enormous damage to infrastructure and lead to a 15% peak-power reduction in and around Tokyo. The purpose of HVAC is to maintain high indoor environmental quality (IEQ) and workers' productivity. We conducted continuous field and questionnaire surveys in power-saving office buildings in the summers of 2011-2013. The results indicate that the thermal environment and indoor air quality recovered to pre-quake levels after 2012; whereas, considering the lighting environment, desk level illuminance was greatly decreased from 750 lux (pre-quake) to around 500 lux (post-quake). Nearly all of the workers are satisfied with IEQ today, but this differed with the workers' gender, age, awareness of saving electricity, and work satisfaction. In particular, differences in workers' awareness had a profound effect on their satisfaction with IEQ. This indicates that workers who were supportive of saving electricity experienced and reported greater satisfaction with IEQ. This conclusion will provide clue to the way of the operation and environmental control in the offices in Japan, also in the many countries which unexperienced such the great earthquake. Based on reported data future HVAC is described.

ホスト出版物のタイトル24th IIR International Congress of Refrigeration, ICR 2015
出版社International Institute of Refrigeration
出版ステータスPublished - 2015
イベント24th IIR International Congress of Refrigeration, ICR 2015 - Yokohama, Japan
継続期間: 2015 8月 162015 8月 22


Other24th IIR International Congress of Refrigeration, ICR 2015

ASJC Scopus subject areas

  • 制御およびシステム工学
  • 電子工学および電気工学
  • 機械工学
  • 凝縮系物理学


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