Validation of thermoregulation human model considering mist wettedness on mist spraying environment
Validation of thermoregulation human model considering mist wettedness on mist spraying environment
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DOI：
10.1088/1757-899x/609/5/052034
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发表时间：
2019-10
期刊：
影响因子：
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通讯作者：
Wonseok Oh;R. Ooka;J. Nakano;H. Kikumoto;O. Ogawa
中科院分区：
文献类型：
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作者：
Wonseok Oh;R. Ooka;J. Nakano;H. Kikumoto;O. Ogawa
喷雾系统可以缓解酷热天气下的热不适。然而，喷雾系统对人体的热效应还没有得到充分的研究。为了了解人体与周围环境之间的物理现象，以及人体在喷雾环境中的生理反应，采用2节点模型（2NM）对人体热状态进行了预测。同时测量了65名受试者的皮肤温度和四个环境因素（空气温度，平均辐射温度，相对湿度和空速）。喷雾系统使周围温度下降3.6 ± 1.4 ° C，相对湿度上升15.9 ± 4.7%。此外，当使用传统的2NM与测量的环境因素作为输入参数来预测整体皮肤温度时，与本实验结果相反，在喷雾环境中皮肤温度升高。然而，当在体温调节人体模型中另外考虑雾的湿润性时，考虑到从身体表面蒸发的雾颗粒的热损失，在喷雾环境中降低的皮肤温度是可预测的。预测结果与实验结果之间的平均误差为0.4 ° C。结果表明，雾湿度是准确预测喷雾环境中人体热状况的关键因素。
Mist spraying systems can relieve thermal discomfort in extremely hot weather. However, the thermal effect of the mist spraying system on the human body has not been investigated sufficiently. To understand a physical phenomenon between human and surrounding environment, and physiological responses of the human body in mist spraying environment, the thermal state of the human body were predicted using the 2-node model (2NM). Sixty-five subjects’ skin temperatures and four environmental factors (air temperature, mean radiation temperature, relative humidity, and airspeed) were measured simultaneously. The mist spraying system caused the surrounding temperature to fall by 3.6 ± 1.4 °C and relative humidity to rise by 15.9 ± 4.7%. In addition, when the overall skin temperature was predicted using the conventional 2NM with measured environmental factors as an input parameter, the skin temperature was increased in mist spraying environment as opposed to the subject experimental results. However, when the mist wettedness is additionally considered in the thermoregulation human model, the decreasing skin temperature in the mist spraying environment was predictable considering the heat loss of the mist particles evaporated from the body surface. The mean error between the predicted and the experimental results showed a result of 0.4 °C. In conclusion, it was found that the mist wettedness is a key factor to predict human thermal conditions in the mist spraying environment accurately.