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A personal radiant heating and cooling system was proposed for use in bedrooms. This system was designed to accommodate the differences in thermal comfort between individuals by considering factors such as sex and age. The system comprises a panel with thin water tubes attached to the wall as a bed headboard. This study focused on the cooling effect of the system on the sleep environment during summer. We conducted indoor environmental measurements, experiments with a thermal manikin, and sleep experiments with participants to demonstrate that our system is effective in cooling the skin temperature and improving sleep quality. The experiment with a thermal manikin showed that the combined use of the radiant cooling system and air conditioning lowered the equivalent temperature of the top of the head by 2.1 °C in comparison with the situation without the system. For the sleep experiments, the 20 participants were divided into two groups. One group slept in a bedroom with a radiant cooling system, whereas the other slept in a bedroom without the system. The mean sleep efficiency of participants who slept in the bedroom with the system was higher than that of participants who slept in the bedroom without the system. The subjective evaluation demonstrated that the radiative cooling system was effective in maintaining sleep.

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The Effect of the Personal Radiative Cooling and Heating System for Bed Headboards on the Sleep Thermal Environment

  • 会议论文

  • 发表日期：

    2026年

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  • Miho Miyauchi,
  • Jun Yuasa,
  • Jumpei Nakano,
  • Keita Mizuno,
  • Mizuho Akimoto,
  • Isamu Ohta,
  • Kazuyo Tsuzuki,
  • Shin-ichi Tanabe

摘要

A personal radiant heating and cooling system was proposed for use in bedrooms. This system was designed to accommodate the differences in thermal comfort between individuals by considering factors such as sex and age. The system comprises a panel with thin water tubes attached to the wall as a bed headboard. This study focused on the cooling effect of the system on the sleep environment during summer. We conducted indoor environmental measurements, experiments with a thermal manikin, and sleep experiments with participants to demonstrate that our system is effective in cooling the skin temperature and improving sleep quality. The experiment with a thermal manikin showed that the combined use of the radiant cooling system and air conditioning lowered the equivalent temperature of the top of the head by 2.1 °C in comparison with the situation without the system. For the sleep experiments, the 20 participants were divided into two groups. One group slept in a bedroom with a radiant cooling system, whereas the other slept in a bedroom without the system. The mean sleep efficiency of participants who slept in the bedroom with the system was higher than that of participants who slept in the bedroom without the system. The subjective evaluation demonstrated that the radiative cooling system was effective in maintaining sleep.