Impact of dynamic airflow on human thermal response

Zhou, Xiang; Ouyang, Qiubao; Lin, Guan‐Yu; Zhu, Yingxin

doi:10.1111/j.1600-0668.2006.00430.x

Cited by 77 publications

(41 citation statements)

References 9 publications

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“…More recent research including both laboratory studies (e.g. Tanabe & Kimura, 1994;Zhou et al, 2006) and field research (e.g. Aynsley, 2008;Câ ndido et al, 2010;Hoyt et al, 2009) have demonstrated the positive perceptual response associated with increased air movement inside buildings when occupants' general thermal state is slightly warm but still within the warm limit of the adaptive comfort zone.…”

Section: Local Thermal Discomfortmentioning

confidence: 96%

Thermal pleasure in built environments: physiology of alliesthesia

Parkinson

Dear

2014

Building Research & Information

192

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International standards that define thermal comfort in uniform environments are based on the steady-state heat balance equation that posits 'neutrality' as the optimal occupant comfort state for which environments are designed. But thermal perception is more than an outcome of a deterministic, steady-state heat balance. Thermal alliesthesia is a conceptual framework to understand the hedonics of a much larger spectrum of thermal environments than the more thoroughly researched concept of thermal neutrality. At its simplest, thermal alliesthesia states that the hedonic qualities of the thermal environment are determined as much by the general thermal state of the subject as by the environment itself. A peripheral thermal stimulus that offsets or counters a thermoregulatory load-error will be pleasantly perceived and vice versa, a stimulus that exacerbates thermoregulatory load-error will feel unpleasant. The present paper elaborates the thermophysiological hypothesis of alliesthesia with a particular focus on set-point control and the origins of thermoregulatory load-error signals, and then discusses them within the broader context of thermal pleasure. Alliesthesia provides an overarching framework within which diverse and previously disconnected findings of laboratory experiments, field studies and even comfort standards spanning the last 40 years of thermal comfort research can be more coherently understood.

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Section: Local Thermal Discomfortmentioning

confidence: 96%

Thermal pleasure in built environments: physiology of alliesthesia

Parkinson

Dear

2014

Building Research & Information

192

View full text Add to dashboard Cite

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“…Researchers also attempted to determine the thermal neutral temperature of different air distribution systems (mixing ventilation, displacement ventilation and stratum ventilation) [144], to evaluate a rule of thumb to assess the risk of downdraught during design phase [145] and to evaluate the effect of using fans with simulated natural wind [146] and with different airflow fluctuation frequencies [147,148] in thermal comfort.…”

Section: Other Studiesmentioning

confidence: 99%

A review of human thermal comfort in the built environment

Rupp

Vásquez

Lamberts

2015

Energy and Buildings

697

282

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“…Air movement has a significant cooling effect, increasing the acceptable range of indoor temperatures [1][2][3][4]. ASHRAE Standard 55-2010 uses the model PMV to determine comfortable temperatures under still air, and uses the SET (standard effective temperature) index as the basis for extending this still-air comfort zone under elevated air speeds [5].…”

Section: Introductionmentioning

confidence: 99%

Applicability of whole-body heat balance models for evaluating thermal sensation under non-uniform air movement in warm environments

Huang

Arens

Zhang

et al. 2014

Building and Environment

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In ASHRAE Standard 55-2010, the comfort effects of elevated air movement are evaluated using the SET index as computed by the Gagge 2-Node model of whole-body heat balance. Air movement in reality has many forms, which might create heat flows and thermal sensations that cannot be accurately predicted by a simple whole-body model. This paper addresses two of such potential inaccuracies: 1) indoor airflows may affect only a portion of the body surface (e.g., above desktop), and the affected body surface might be variably nude (e.g. face) or clothed, 2) the turbulence intensity (TI) in some typical airstreams (e.g., those created by fans) might have a different impact on heat transfer than the TI implicit in 2-Node's single convective heat transfer coefficient. For both these issues, can a whole-body index like SET represent such a wide range of possible exposures to airflow?Measurements of thermal sensation were obtained from human subjects using face-level fans in warm environments. Previous laboratory studies of a range of airstream sources were also analyzed. The effects of turbulence intensity were examined with manikin tests.The results show that indices derived from the 2-Node model of whole-body heat balance are effective at predicting thermal sensation under most non-uniform air movement. In contrast, the PMV index underestimates cooling in warm conditions.Turbulence increases the cooling effect of air movement, but by amounts that might be neglected for most design purposes.

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Impact of dynamic airflow on human thermal response

Cited by 77 publications

References 9 publications

Thermal pleasure in built environments: physiology of alliesthesia

Thermal pleasure in built environments: physiology of alliesthesia

A review of human thermal comfort in the built environment

Applicability of whole-body heat balance models for evaluating thermal sensation under non-uniform air movement in warm environments

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