Effect of power saving measures on comfort, productivity and energy conservation: Research on the field survey of office buildings under power saving after the Great East Japan Earthquake

Yuko Iwahashi, Shinichi Tanabe, Sayana Tsushima, Naoe Nishihara, Masaya Hiraoka, Hideharu Komoda, Seiichi Tabuchi

    Research output: Contribution to journalArticle

    2 Citations (Scopus)


    The Great East Japan Earthquake and Tsunami which occurred on March 11, 2011 caused widespread damage and electricity shortage. So the Japanese government has directed large-scale electricity users to curb their consumption by 15 percent of what they used last summer. However, excessive saving electricity forces office workers to be patient, and it can lead to productivity decline. In this study, the field survey and questionnaire survey were conducted in six buildings saving on electricity to study the indoor environment, the workers' productivity and energy conservation. As a result, it was found that the rise of temperature leads to the sharp decline of productivity and comfort, and that power saving of lighting made less dissatisfaction for office workers and reduced more electric energy than turning up the air conditioning. Office workers can keep productivity if there are no dissatisfactions for them. Therefore, lowering illuminance is found to be more effective for saving electricity than turning up the air conditioning.

    Original languageEnglish
    Pages (from-to)901-908
    Number of pages8
    JournalJournal of Environmental Engineering (Japan)
    Issue number704
    Publication statusPublished - 2014 Oct 1



    • Air conditioning
    • Comfort
    • Field survey
    • Lighting
    • Power saving
    • Productivity

    ASJC Scopus subject areas

    • Environmental Engineering

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