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Multi-zone outdoor air coordination through Wi-Fi probe-based occupancy sensing

机译：通过基于Wi-Fi探头的占用感测进行多区域室外空气协调

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摘要

As most urban residents spend an average 90% of their time in buildings, it is crucial for building residents to monitor and maintain a comfortable indoor environment and air quality. Controlling the indoor carbon dioxide (CO2) concentration level is the major objective of mechanical ventilation systems to ensure healthy indoor air quality (IAQ). Current methods utilize proportional-integral-derivative (PID) controllers and multi-zone equations to operate ventilation systems in large spaces based on ASHRAE Standard 62. However, this approach suggests to determine the fresh air supply rate primarily based on CO2 level without considering occupancy. This often results in insufficient fresh air or energy waste in unnecessary mechanical operations in unoccupied building zones. Therefore, this study proposes a ventilation strategy based on occupancy profiles that captured by a Wi-Fi probe enabled occupancy sensing system. Based on the detected occupancy profiles, the proposed ventilation strategy and other two conventional strategies were compared in a two-day experiment conducted a multi-zone space. The comparison results in the experiment show that the proposed approach could maintain a CO2 concertation level lower than 1000 ppm for 94% (weekday) and 80% (weekend day) of day time for all zones. At the same time, the proposed strategy saved about 44.26% (weekday) and 55.5% (weekend day) of ventilation energy consumption when compared to the fixed rate ventilation strategy and saved about 23.6% (weekday) and 46.1% (weekend day) of ventilation energy consumption when compared to the multi-zone equation strategy. (C) 2017 Elsevier B.V. All rights reserved.
机译：由于大多数城市居民平均将90％的时间花在建筑物上，因此对于建筑物居民来说，监视并保持舒适的室内环境和空气质量至关重要。机械通风系统的主要目标是控制室内二氧化碳（CO2）的浓度，以确保室内空气质量（IAQ）。当前的方法利用比例积分微分（PID）控制器和多区域方程式，根据ASHRAE标准62在大空间中操作通风系统。但是，这种方法建议主要根据CO2水平确定新鲜空气供应率，而不考虑占用率。这通常导致在空旷的建筑区域中不必要的机械操作中新鲜空气不足或浪费能源。因此，这项研究提出了一种基于由Wi-Fi探针启用的占用感测系统捕获的占用情况的通风策略。根据检测到的占用情况，在为期两天的多区域空间实验中比较了建议的通风策略和其他两种常规策略。实验中的比较结果表明，对于所有区域，在白天时间的94％（工作日）和80％（周末），CO2协调一致水平可以保持低于1000 ppm。同时，与定额通风策略相比，拟议策略节省了约44.26％（工作日）和55.5％（周末）的通风能耗，并节省了约23.6％（工作日）和46.1％（周末）的通风能耗。与多区域方程式策略相比时的通风能耗。 （C）2017 Elsevier B.V.保留所有权利。

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  • 来源
    《Energy and Buildings》 |2018年第1期|495-507|共13页
  • 作者

    Wang Wei; Wang Junqi; Chen Jiayu; Huang Gongsheng; Guo Xiaoyang;

  • 作者单位

    City Univ Hong Kong, Dept Architecture & Civil Engn, Y6621,AC1,Tat Chee Ave, Kowloon, Hong Kong, Peoples R China;

    City Univ Hong Kong, Dept Architecture & Civil Engn, Y6621,AC1,Tat Chee Ave, Kowloon, Hong Kong, Peoples R China;

    City Univ Hong Kong, Dept Architecture & Civil Engn, Y6621,AC1,Tat Chee Ave, Kowloon, Hong Kong, Peoples R China;

    City Univ Hong Kong, Dept Architecture & Civil Engn, Y6621,AC1,Tat Chee Ave, Kowloon, Hong Kong, Peoples R China;

    China State Construct Engn Corp, 15 Sanlihe Rd, Beijing 100037, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Indoor air quality; Occupancy prediction; Critical zone; Outdoor air control; Energy saving;

    机译：室内空气质量;占用率预测;关键区域;室外空气控制;节能;

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