Influence of long-term thermal history on thermal comfort and preference

Jowkar, Mina; Dear, Richard de; Brusey, James

doi:10.1016/j.enbuild.2019.109685

Cited by 80 publications

(30 citation statements)

References 52 publications

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“…Take " temperature” for an example, it means subjects prefer the current temperature to be cooler or warmer or keeping unchanged to make them be thermal comfort. In some previous related studies [ [42] , [43] , [44] , [45] , [46] ], the” thermal preference” expression is the same as that of this study. When wearing PPE, almost all subjects preferred a lower temperature (89.5%), lower relative humidity (80.4%), and higher air velocity (90.6%), compared to 33.1%, 12.6%, and 4.4% when not wearing PPE.…”

Section: Resultsmentioning

confidence: 86%

Experimental investigation of the effects of personal protective equipment on thermal comfort in hot environments

Mao

Zhu

Guo

et al. 2022

Building and Environment

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Section: Resultsmentioning

confidence: 86%

Experimental investigation of the effects of personal protective equipment on thermal comfort in hot environments

Mao

Zhu

Guo

et al. 2022

Building and Environment

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“…Studies showed that the differences of long-term indoor thermal histories significantly affected the physiological adaptation (Luo et al, 2016b) and thermal expectations of occupants in cold environments (Luo et al, 2016a;Luo et al, 2018). Ning et al revealed that the cold adaptability of occupants who had a long-term thermal history in warm indoor climate was undermined (Ning et al, 2016b) and their neutral temperature was about 2°C higher than the occupants with long-term thermal history in cooler conditions (Ning et al, 2016a), which was also proved in another study (Jowkar et al, 2020). Although tracked field studies (Liu et al, 2020;Liu et al, 2017b) showed the difference in thermal sensation between migrations and locals was decreased with time, Luo et al (Luo et al, 2019) found the effect of long-term thermal history could last for 3 years.…”

Section: Introductionmentioning

confidence: 81%

Individual thermal comfort prediction using classification tree model based on physiological parameters and thermal history in winter

Hong

et al. 2021

Build. Simul.

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Individual thermal comfort models based on physiological parameters could improve the efficiency of the personal thermal comfort control system. However, the effect of thermal history has not been fully addressed in these models. In this study, climate chamber experiments were conducted in winter using 32 subjects who have different indoor and outdoor thermal histories. Two kinds of thermal conditions were investigated: the temperature dropping (24-16°C) and severe cold (12°C) conditions. A simplified method using historical air temperature to quantify the thermal history was proposed and used to predict thermal comfort and thermal demand from physical or physiological parameters. Results show the accuracies of individual thermal sensation prediction was low to about 30% by using the PMV index in cold environments of this study. Base on the sensitivity and reliability of physiological responses, five local skin temperatures (at hand, calf, head, arm and thigh) and the heart rate are optimal input parameters for the individual thermal comfort model. With the proposed historical air temperature as an additional input, the general accuracies using classification tree model C5.0 were increased up to 15.5% for thermal comfort prediction and up to 29.8% for thermal demand prediction. Thus, when predicting thermal demands in winter, the factor of thermal history should be considered.

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“…The classification per climate zone is relevant, since different climatic conditions can influence the thermal perception and preference of students due to adaptive processes. Considering that thermal history can affect students' thermal comfort [78], the classification per climate zone is relevant in the perspective of improving environmental conditions and reducing energy consumptions in the global warming era. Indeed, the current challenge for building designers is to provide low-energy buildings while enhancing thermal comfort, especially under warmer conditions caused by climate change [79].…”

Section: Climate Zonementioning

confidence: 99%

Advancement on Thermal Comfort in Educational Buildings: Current Issues and Way Forward

et al. 2021

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The thermal environment in educational buildings is crucial to improve students’ health and productivity, as they spend a considerable amount of time in classrooms. Due to the complexity of educational buildings, research performed has been heterogeneous and standards for thermal comfort are based on office studies with adults. Moreover, they rely on single dose-response models that do not account for interactions with other environmental factors, or students’ individual preferences and needs. A literature study was performed on thermal comfort in educational buildings comprising of 143 field studies, to identify all possible confounding parameters involved in thermal perception. Educational stage, climate zone, model adopted to investigate comfort, and operation mode were then selected as confounding parameters and discussed to delineate the priorities for future research. Results showed that children often present with different thermal sensations than adults, which should be considered in the design of energy-efficient and comfortable educational environments. Furthermore, the use of different models to analyse comfort can influence field studies’ outcomes and should be carefully investigated. It is concluded that future studies should focus on a more rational evaluation of thermal comfort, also considering the effect that local discomfort can have on the perception of an environment. Moreover, it is important to carefully assess possible relationships between HVAC systems, building envelope, and thermal comfort, including their effect on energy consumption. Since several studies showed that the perception of the environment does not concern thermal comfort only, but it involves the aspects of indoor air, acoustic, and visual quality, their effect on the health and performance of the students should be assessed. This paper provides a way forward for researchers, which should aim to have an integrated approach through considering the positive effects of indoor exposure while considering possible individual differences.

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Influence of long-term thermal history on thermal comfort and preference

Cited by 80 publications

References 52 publications

Experimental investigation of the effects of personal protective equipment on thermal comfort in hot environments

Experimental investigation of the effects of personal protective equipment on thermal comfort in hot environments

Individual thermal comfort prediction using classification tree model based on physiological parameters and thermal history in winter

Advancement on Thermal Comfort in Educational Buildings: Current Issues and Way Forward

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