Experimental study on thermal comfort of sleeping people at different air temperatures

Lan, Li; Pan, Li; Lian, Zhiwei; Huang, Hongyuan; Lin, Yanbing

doi:10.1016/j.buildenv.2013.11.024

Cited by 159 publications

(82 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…10,47 If they slept without covering, the neutral temperature would increase to 28°C. 62 Using local cooling, the thermal comfortable temperatures increased to 31°C and 32°C in the present study.…”

Section: Discussionmentioning

confidence: 99%

“…3,4 The thermoregulatory system and the sleep regulating mechanisms have been shown to be strongly linked in humans, 5,6 and this was later confirmed by many studies that show high or low air temperatures, even moderately different from the neutral temperature, could significantly decrease sleep quality. [7][8][9][10] However, in many areas with long and hot summers, indoor air temperatures are very high. For example, in southern China, the indoor air temperature was found to be higher than 34°C in natural ventilated buildings during the summer season.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Local body cooling to improve sleep quality and thermal comfort in a hot environment

et al. 2017

View full text Add to dashboard Cite

The effects of local body cooling on thermal comfort and sleep quality in a hot environment were investigated in an experiment with 16 male subjects. Sleep quality was evaluated subjectively, using questionnaires completed in the morning, and objectively, by analysis of electroencephalogram (EEG) signals that were continuously monitored during the sleeping period. Compared with no cooling, the largest improvement in thermal comfort and sleep quality was observed when the back and head (neck) were both cooled at a room temperature of 32°C. Back cooling alone also improved thermal comfort and sleep quality, although the effects were less than when cooling 1,2 Disturbed nocturnal sleep also has consequential effects on health, increasing the risk of obesity, Type 2 diabetes, and cardiovascular disease. 3,4 The thermoregulatory system and the sleep regulating mechanisms have been shown to be strongly linked in humans, 5,6 and this was later confirmed by many studies that show high or low air temperatures, even moderately different from the neutral temperature, could significantly decrease sleep quality. 7-10 However, in many areas with long and hot summers, indoor air temperatures are very high. For example, in southern China, the indoor air temperature was found to be higher than 34°C in natural ventilated buildings during the summer season. 11 A survey in Indonesia found that the indoor air temperatures were higher than 32°C in naturally ventilated residential buildings. 12 Global warming that leads to higher temperatures will create still hotter indoor conditions. Attention is now being paid to how climate change may degrade the indoor thermal environment in buildings.13 It has been reported that heat-related deaths correlate, not just with daytime temperature, but also with nighttime temperatures. The highest risk factor for heat-related death is a bedroom located on the second floor without air-conditioning. 14 A study in 79 households in Greenland showed that in summer 19% of all bedroom temperature were above 26°C although the outside temperatures averaged no more than 9.5°C. 15Full air-conditioning may be one of the easiest ways to improve thermal environment. However, large amounts of cool air (often recirculated room air, for residential buildings) must be supplied to maintain indoor temperatures at acceptable levels in the entire building (including unoccupied areas), leading to increased energy consumption. 16Thus, especially in areas with hot summers, the long summer period

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Local body cooling to improve sleep quality and thermal comfort in a hot environment

et al. 2017

View full text Add to dashboard Cite

show abstract

“…physical activity and clothing) obtained by either field measurements or numerical calculations. Furthermore, this model has been used to develop other thermal comfort sub-models [16][17][18][19][20], design and optimise building spaces under specific weather/climate conditions [21,22], and study thermo-fluid characteristics in space/room without objective and human occupant [23,24] or with objective and human occupant [25], respectively.…”

Section: Introductionmentioning

confidence: 99%

Numerical optimisation of thermal comfort improvement for indoor environment with occupants and furniture

Horikiri

Yao

2015

Energy and Buildings

View full text Add to dashboard Cite

Indoor thermal environment of a 3-D ventilated room was studied by computational fluid dynamics to understand correlations between heat generation, ventilation velocity and thermal sensation indices. The existence of a thermal occupant was found to produce thermal plume approx stronger in magnitude than that from an unoccupied room. With second thermal occupant, there has further temperature increase of maximum , equivalent to an increase of PPD value by , for which occupants would normally feel uncomfortable.Thus, an increased flow ventilation rate ( ) would be required, in order to keep the same thermal comfort level of the room.

show abstract

“…Individual health factors and satisfaction in life would influence physical and mental health, social economy, and family conditions. Individual perception of the cultural value in the life is related to personal goal, expectation, and standard, including physiology, psychology, society, individual, and environment (Antonishen, 2015) and satisfaction with individual perception of selfimportance in the life (Lan et al, 2014). Healthy quality of life referred to individual perception of health factors in life and satisfaction (Szymczynska et al, 2017).…”

Section: Quality Of Lifementioning

confidence: 99%

To Explore the Impact of Medical Education on Sleep Quality toward Quality of Life

Luo

Xü

2018

EURASIA J MATH SCI T

View full text Add to dashboard Cite

Sleep is the basic physiological needs of human beings, while sleep disorder commonly occur in the public. Bad sleep quality would result in bad work efficiency and low quality of life. Insomnia problem is regarded as a disease seriously affecting quality of life in current industrial and commercial societies. Medical education allows students presenting further cognition of self-health concepts and people understanding that proper physical activity could enhance citizens' physical fitness, reduce the occurrence of chronic diseases, and largely help the expenditure of social medical expenses. Apparently, medical education is primary for human health. With experimental design, total 200 students in four classes of the University in Shanghai, as the research object, are proceeded 16-week (3hrs per week for total 48 hours) experimental teaching. The research results reveal the significant correlation between 1.medical education and sleep quality, 2.sleep quality and quality of life, and 3.medical education and quality of life. According to the results and findings, practical suggestions are proposed in this study, expecting to reinforce relevant medical education and draft lifestyles to enhance the sleep quality and quality of life.

show abstract

Experimental study on thermal comfort of sleeping people at different air temperatures

Cited by 159 publications

References 29 publications

Local body cooling to improve sleep quality and thermal comfort in a hot environment

Local body cooling to improve sleep quality and thermal comfort in a hot environment

Numerical optimisation of thermal comfort improvement for indoor environment with occupants and furniture

To Explore the Impact of Medical Education on Sleep Quality toward Quality of Life

Contact Info

Product

Resources

About