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首页> 外文期刊>Building and Environment >Model validation and parametric study on a personal heating clothing system (PHCS) to help occupants attain thermal comfort in unheated buildings
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Model validation and parametric study on a personal heating clothing system (PHCS) to help occupants attain thermal comfort in unheated buildings

机译：在个人取暖服系统（PHCS）上进行模型验证和参数研究，以帮助居住者在未加热的建筑物中获得热舒适感

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摘要

Personal heating clothing systems (PHCS) incorporated with electrical heating elements have shown its great potential to help occupants attain thermal comfort in cold built environments. Presently there is a lack of a comprehensive study to optimize the PHCS's performance. In this work, a newly developed complete 3D model was used to systematically examine the factors affecting the PHCS's heating performance in various cold unheated built environments. Effects of ambient temperature, clothing insulation, heating power, heating mode and metabolic rate on the PHCS's performance were investigated by performing a numerical parametric study. Validation data have demonstrated that the 3D model could precisely predict human thermophysiological responses while wearing PHCS in the built environment. At 15.0 degrees C indoor temperature and metabolic rate of 1.6 met, wearing a PHCS with thermal insulation of 1.0 clo and heating power of 20 W could help occupants attain thermal comfort. It was also found that compared with continuous heating, intermittent heating at a high heating frequency could contribute to saving energy without compromise of body temperature reduction. Furthermore, metabolic rate has a significant impact on thermophysiological responses and the mean heaters' temperature. Hence, the selection and operation of a PHCS should be based on the nature of occupant activities. Occupants are advised to adjust the heating power to a lower level when performing more demanding activities because the need for auxiliary heating is not as high as that in the case when occupants are resting or performing seated office activities.
机译：结合了电加热元件的个人加热衣系统（PHCS）已显示出巨大的潜力，可以帮助居住者在寒冷的建筑环境中获得热舒适感。当前，缺乏全面的研究来优化PHCS的性能。在这项工作中，使用了新开发的完整3D模型来系统地检查影响各种冷未加热建筑环境中PHCS加热性能的因素。通过进行数值参数研究，研究了环境温度，衣物隔热，加热功率，加热方式和代谢速率对PHCS性能的影响。验证数据表明，在建筑环境中佩戴PHCS时，3D模型可以精确预测人类的热生理反应。在15.0摄氏度的室内温度和1.6的代谢速率下，穿着热绝缘为1.0克的PHCS和20瓦的加热功率可以帮助居住者获得热舒适感。还发现，与连续加热相比，高加热频率的间歇加热可有助于节省能量，而不会降低体温。此外，代谢率对热生理反应和平均加热器温度有重要影响。因此，PHCS的选择和操作应基于乘员活动的性质。建议乘员在进行更苛刻的活动时将供暖功率调低，因为对辅助供暖的需求不如乘员休息或坐办公室时要高。

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