EFFECTS of THERMAL LOAD and ITS VARIATION on SLEEP

Ken Unno, Emika Miyake, Shinichi Tanabe

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    Different kinds of adaptive opportunities are selected in bedrooms, such as air conditioning and natural ventilation; however, the thermal environment created by these measures is not necessarily good for sleep. In this research, a field survey was carried out to investigate the effect of the total thermal environment and its variation on sleep. First, we investigated the effect of airflow and found that an increase in air turbulence causes an increase in the duration of wakefulness. Next, we adjusted the comfort equation for sleep and calculated the thermal load on the body and its variation. We found that both negative and positive increase in the heat load on the body causes an increase in the probability of awakening. An increase in its variation also resulted in an increase in the probability of awakening. We concluded that when planning a pleasant thermal environment for sleep, it is important to consider the total thermal environment and to take into account the effect of its variation as potential cause of sleep disruption.

    Original languageEnglish
    Pages (from-to)917-923
    Number of pages7
    JournalJournal of Environmental Engineering (Japan)
    Volume80
    Issue number716
    DOIs
    Publication statusPublished - 2015

    Fingerprint

    Thermal load
    Air conditioning
    Ventilation
    Turbulence
    Sleep
    Planning
    Hot Temperature
    Air

    Keywords

    • Air Turbulence
    • Field Survey
    • Sleep
    • Thermal Environment
    • Thermal Load on Body

    ASJC Scopus subject areas

    • Environmental Engineering

    Cite this

    EFFECTS of THERMAL LOAD and ITS VARIATION on SLEEP. / Unno, Ken; Miyake, Emika; Tanabe, Shinichi.

    In: Journal of Environmental Engineering (Japan), Vol. 80, No. 716, 2015, p. 917-923.

    Research output: Contribution to journalArticle

    @article{64b61da746904deb9e4b991c1309e328,
    title = "EFFECTS of THERMAL LOAD and ITS VARIATION on SLEEP",
    abstract = "Different kinds of adaptive opportunities are selected in bedrooms, such as air conditioning and natural ventilation; however, the thermal environment created by these measures is not necessarily good for sleep. In this research, a field survey was carried out to investigate the effect of the total thermal environment and its variation on sleep. First, we investigated the effect of airflow and found that an increase in air turbulence causes an increase in the duration of wakefulness. Next, we adjusted the comfort equation for sleep and calculated the thermal load on the body and its variation. We found that both negative and positive increase in the heat load on the body causes an increase in the probability of awakening. An increase in its variation also resulted in an increase in the probability of awakening. We concluded that when planning a pleasant thermal environment for sleep, it is important to consider the total thermal environment and to take into account the effect of its variation as potential cause of sleep disruption.",
    keywords = "Air Turbulence, Field Survey, Sleep, Thermal Environment, Thermal Load on Body",
    author = "Ken Unno and Emika Miyake and Shinichi Tanabe",
    year = "2015",
    doi = "10.3130/aije.80.917",
    language = "English",
    volume = "80",
    pages = "917--923",
    journal = "Journal of Environmental Engineering, ASCE",
    issn = "1348-0685",
    publisher = "American Society of Civil Engineers (ASCE)",
    number = "716",

    }

    TY - JOUR

    T1 - EFFECTS of THERMAL LOAD and ITS VARIATION on SLEEP

    AU - Unno, Ken

    AU - Miyake, Emika

    AU - Tanabe, Shinichi

    PY - 2015

    Y1 - 2015

    N2 - Different kinds of adaptive opportunities are selected in bedrooms, such as air conditioning and natural ventilation; however, the thermal environment created by these measures is not necessarily good for sleep. In this research, a field survey was carried out to investigate the effect of the total thermal environment and its variation on sleep. First, we investigated the effect of airflow and found that an increase in air turbulence causes an increase in the duration of wakefulness. Next, we adjusted the comfort equation for sleep and calculated the thermal load on the body and its variation. We found that both negative and positive increase in the heat load on the body causes an increase in the probability of awakening. An increase in its variation also resulted in an increase in the probability of awakening. We concluded that when planning a pleasant thermal environment for sleep, it is important to consider the total thermal environment and to take into account the effect of its variation as potential cause of sleep disruption.

    AB - Different kinds of adaptive opportunities are selected in bedrooms, such as air conditioning and natural ventilation; however, the thermal environment created by these measures is not necessarily good for sleep. In this research, a field survey was carried out to investigate the effect of the total thermal environment and its variation on sleep. First, we investigated the effect of airflow and found that an increase in air turbulence causes an increase in the duration of wakefulness. Next, we adjusted the comfort equation for sleep and calculated the thermal load on the body and its variation. We found that both negative and positive increase in the heat load on the body causes an increase in the probability of awakening. An increase in its variation also resulted in an increase in the probability of awakening. We concluded that when planning a pleasant thermal environment for sleep, it is important to consider the total thermal environment and to take into account the effect of its variation as potential cause of sleep disruption.

    KW - Air Turbulence

    KW - Field Survey

    KW - Sleep

    KW - Thermal Environment

    KW - Thermal Load on Body

    UR - http://www.scopus.com/inward/record.url?scp=84947287528&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84947287528&partnerID=8YFLogxK

    U2 - 10.3130/aije.80.917

    DO - 10.3130/aije.80.917

    M3 - Article

    AN - SCOPUS:84947287528

    VL - 80

    SP - 917

    EP - 923

    JO - Journal of Environmental Engineering, ASCE

    JF - Journal of Environmental Engineering, ASCE

    SN - 1348-0685

    IS - 716

    ER -