Quantitative Estimation of Transient Thermal Sensation under Unsteady Thermal Environments

1.非稳态热环境下的瞬态热感觉行为提出了一种适用于非稳态热环境的瞬态热感觉评价的新的投票方法，并利用九州大学宽3200 × 2250 mm、高2700 mm的实验室对瞬态热感觉行为进行了研究。阐明了环境温度变化率与瞬态热感觉的相关性，发现了非稳态热环境下瞬态热感觉的时间延迟.非稳态热环境下的热感觉与皮肤表面温度、表面热流、血流量等生理参数及热环境参数的相关性利用热红外热像仪和激光多普勒血流仪对皮肤表面温度和血流量进行了测量，证实其相对于环境温度的时间变化具有时滞.多孔介质等效生物热方程模型对瞬态热感觉生理数据的检验提出了一种考虑毛细血管血流场动量方程的生物热方程模型，该模型通过假设毛细血管的等效渗透率随温度变化而自动调节血液流速。预测的数值皮肤表面温度的时间延迟被证实为实验的顺序。结果表明，热感觉的瞬态行为可以从根本上用非稳态局部皮肤表面温度行为来评价，而非稳态局部皮肤表面温度行为可以通过红外测温仪的实验或计算机的数值计算来估计。

1. Transient behaviors of thermal sensation under unsteady thermal environmentsA new voting method for the evaluation of the transient thermal sensation that is applicable to unsteady thermal environments was proposed and the transient behaviors of thermal sensation were examined by utilizing an experimental test room of 3200x2250 mm in width and of 2700 mm in height placed in Kyushu University. The correlation between the rate of environmental temperature change and the transient thermal sensation was elucidated, where the time delay of the transient thermal sensation under unsteady thermal environments was found.2. Correlation between thermal sensation under unsteady thermal environments and such physiological parameters as the skin surface temperature, surface heat flux and blood flow rate as well as thermal environmental parametersThermal infrared-image viewer and a laser-doppler blood-flow meter were utilized to make measurements of skin-surface temperature and skin blood-flow rate, which were confirmed to have time delay relative to the time change of environmental temperature.3. Examination of Physiological data on transient thermal sensation by a porous medium equivalent bio-heat equation modelA bio-heat equation model, which considers momentum equation for blood flow field through capillary vessels, was proposed, where blood flow rate was automatically adjusted with assumption of temperature-dependent equivalent permeability for the capillary vessels. The predicted time delay of numerical skin surface temperature was confirmed as of the order of the experimental one. It was concluded that the transient behaviors of thermal sensation can be evaluated fundamentally with the unsteady local skin-surface temperature behaviors, which will be estimated experimentally with infrared thermometer or numerically with computer.