Chilled ceiling and displacement ventilation aided with personalized evaporative cooler
Chilled ceiling and displacement ventilation aided with personalized evaporative cooler
复制标题
DOI：
10.1016/j.enbuild.2011.08.026
复制
发表时间：
2011-11-01
影响因子：
6.7
通讯作者：
Ghali, K.
中科院分区：
文献类型：
--
作者：
Chakroun, W.;Ghaddar, N.;Ghali, K.
本文旨在研究冷热天花板置换通风CC/DV系统的能量影响，并辅以个性化蒸发冷却器（PEC），直接针对乘员的躯干和面部。建立了将个性化冷却器与上升热羽相结合的仿真模型。将人周围空调室内空气热模型与分段生物热和热舒适模型相结合，预测人体热舒适。通过室内垂直温度分布的实验数据和被调查者感知的整体舒适度记录，验证了该模型的有效性。实验结果与温度和舒适度预测值吻合较好。当使用个性化冷却时，DV送风温度可高达24摄氏度，而流速为3-10l/s的PEC与供气温度为21摄氏度的DV系统达到相似的舒适度。在相同的热舒适水平下，集成的CC/DV系统，PEC模型与没有PEC的CC/DV系统相比节省了17.5%的能源。在CC/DV系统中使用混合空气时，与不使用PEC的100%新鲜空气相比，可额外节省25%的能源。(C) 2011 Elsevier BM。版权所有。
This paper aims at studying the energy impact of a chilled ceiling displacement ventilation CC/DV system aided with a personalized evaporative cooler (PEC) directed towards the occupant trunk and face. A simulation model is developed for integrating the personalized cooler with the ascending thermal plume. The thermal model of the conditioned room air around the person is integrated with a segmental bioheat and thermal comfort model to predict the human thermal comfort.The model is validated with experimental data on the vertical temperature distribution in the room, and the recorded overall comfort perceived by surveyed subjects. Experimental results agreed well with predicted values of temperature and comfort level. When using personalized cooling, the DV supply air temperature can be as high as 24 degrees C while the PEC at flow rates of 3-10l/s achieved similar comfort with a DV system at supply temperature of 21 degrees C. At equal thermal comfort level, the integrated CC/DV system, PEC model resulted in up to 17.5% energy savings compared to the CC/DV system without a PEC. When mixed air is used in the CC/DV system additional 25% savings in energy is realized when compared with energy used for the 100% fresh air without the PEC. (C) 2011 Elsevier BM. All rights reserved.