An occupant-centric air-conditioning system for occupant thermal preference recognition control in personal micro-environment

MIngya Zhu, Yiqun Pan, Zejun Wu, Jiantong Xie, Zhizhong Huang, Risto Kosonen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Thermal comfort is one of the most important factors of indoor environment quality, affecting occupants’ well-being and work efficiency. With the advent of smart control technology, personalized and intelligent air conditioners have been promoted for occupant-centric intelligent air-conditioning control. Based on commonly used air-conditioning (AC), this paper quantitatively describes the method for occupant thermal preference adaptation, and proposes a rule-based classification method of occupant thermal preference recognition. With the quantitative description and classification of the occupant thermal preference, this paper proposes a multi-step input control method for an occupant-centric fan-coil system. This method provides an indoor thermal environment that fulfills the demands of different preferences and is easy to implement with existing air-conditioning control systems without additional sensors. To perform an application-oriented, closed-loop research of the proposed control method, two prediction models of occupant thermal preferences are developed based on an occupant behavior dataset and they could be used as the well initialized models for future online tunning by continually accumulated dataset. Moreover, aiming for a practical operation guide for conventional occupant-centric air-conditioning systems, this paper validates the effectiveness and accuracy of the proposed multi-step input control method, integrated with occupant thermal preference recognition. This was done by using Programmable Logic Controller (PLC) control experiments and Simulink simulations of an actual personal office room, equipped with a fan-coil unit (FCU) in Shanghai. The research results indicate that dynamic indoor air temperature response with different air-conditioning control modes can meet the control needs of different occupant thermal preference patterns.
Original languageEnglish
Article number107749
JournalBuilding and Environment
Volume196
Early online date2 Mar 2021
DOIs
Publication statusE-pub ahead of print - 2 Mar 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • occupant behavior
  • thermal preference patterns
  • personal preference model
  • fan-coil control
  • personal micro-environment

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