Climate-Resilient Cities Lab, Faculty of Built Environment, UNSW Sydney, Australia; ARC Centre of Excellence for Climate Extremes, UNSW Sydney, Australia.
Climate-Resilient Cities Lab, Faculty of Built Environment, UNSW Sydney, Australia; ARC Centre of Excellence for Climate Extremes, UNSW Sydney, Australia.
Sci Total Environ. 2021 Jun 1;771:144910. doi: 10.1016/j.scitotenv.2020.144910. Epub 2021 Jan 29.
Thermal comfort research has been historically centred around the concept of "thermal neutrality". Thermal neutrality originates from the steady-state indoor environment and is increasingly questioned when used to define the optimum sensation in outdoor environments. This calls for new criteria, designated for non-steady state and dynamically evolving outdoor settings. To address this need, we investigated thermal pleasure dynamics in outdoor environments based on thermal alliesthesia - a psychophysiological framework for understanding the hedonic responses elicited by non-steady-state thermal exposures. Detailed field studies were conducted in Sydney, Australia, during a 30-day period covering both summer and winter with a total of 35 subjects. The thermal sensation scale was quantitatively divided into four alliesthesial potential areas - two with moderate and two with strong alliesthesial potential - based on their divergence to the preferred sensation. We find that the temporal pleasure change (dP) can be predicted using thermal sensation change (dT). The results showed that linear regression performed strongly (R = 0.77 for summer and R = 0.79 for winter) in predicting dP when subjects' preceding sensation was in the strong alliesthesial potential zones - namely the 'Hot' and 'Cold' areas. When subjects' prior thermal sensation fell in the thermoneutral zone with moderate alliesthesial potential, a quadratic fit against dT provides a more reasonable prediction of dP (R = 0.61 for summer and R = 0.56 for winter). The dynamic thermal pleasure models provide a more nuanced subjective interpretation of outdoor urban spaces that includes thermal pleasure and delight. This study contributes further empirical support to the thermal alliesthesia framework and extends its application scope into outdoor thermal comfort research.
热舒适研究历来以“热中性”概念为中心。热中性起源于稳态室内环境，当用于定义室外环境的最佳感觉时，越来越受到质疑。这就需要新的标准，指定用于非稳态和动态演变的室外环境。为了满足这一需求，我们基于热感觉适应（一种理解非稳态热暴露引起的愉悦反应的心理生理框架）研究了室外环境中的热愉悦动态。在澳大利亚悉尼进行了为期 30 天的详细实地研究，涵盖了夏季和冬季，共有 35 名受试者。根据与偏好感觉的偏差，将热感觉量表定量分为四个感觉适应潜力区——两个具有中等感觉适应潜力区和两个具有强烈感觉适应潜力区。我们发现，时间愉悦变化（dP）可以通过热感觉变化（dT）来预测。结果表明，当受试者的先前感觉处于强烈感觉适应潜力区（即“热”和“冷”区）时，线性回归在预测 dP 时表现强劲（夏季 R=0.77，冬季 R=0.79）。当受试者的先前热感觉处于具有中等感觉适应潜力的热中性区时，对 dT 的二次拟合提供了对 dP 的更合理预测（夏季 R=0.61，冬季 R=0.56）。动态热愉悦模型为室外城市空间提供了更细致的主观解释，包括热愉悦和愉悦。本研究为热感觉适应框架提供了进一步的实证支持，并将其应用范围扩展到室外热舒适研究。
