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Research Article

A modelling method for large-scale open spaces orientated toward coordinated control of multiple air-terminal units

Pei Zhou1(), Songjie Wang1, Jintao Zhou1, Syed Asad Hussain2, Xiaoping Liu1, Jiajia Gao3, Gongsheng Huang4
School of Civil Engineering, Hefei University of Technology, Hefei, Anhui, China
Life Cycle Management Laboratory, School of Engineering, University of British Columbia (Okanagan Campus), Kelowna, British Columbia, Canada
Department of Building Environment & Energy Engineering, Wuhan University of Science & Technology, Wuhan, China
Department of Architectural and Civil Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
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Abstract

The temperature distribution is always assumed to be homogeneous in a traditional single-input-single-output (SISO) air conditioning control strategy. However, the airflow inside is more complicated and unpredictable. This study proposes a zonal temperature control strategy with a thermal coupling effect integrated for air-conditioned large-scale open spaces. The target space was split into several subzones based on the minimum controllable air terminal units in the proposed method, and each zone can be controlled to its own set-point while considering the thermal coupling effect from its adjacent zones. A numerical method resorting to computational fluid dynamics was presented to obtain the heat transfer coefficients (HTCs) under different air supply scenarios. The relationship between heat transfer coefficient and zonal temperature difference was linearized. Thus, currently available zonal models in popular software can be used to simulate the dynamic response of temperatures in large-scale indoor open spaces. Case studies showed that the introduction of HTCs across the adjacent zones was capable of enhancing the precision of temperature control of large-scale open spaces. It could satisfy the temperature requirements of different zones, improve thermal comfort and at least 11% of energy saving can be achieved by comparing with the conventional control strategy.

Keywords

large-scale open spacezonal temperature controlCFDthermal couplingheat transfer coefficientTRNSYS

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Building Simulation
Volume 16 Issue 2,
February 2023
Pages 225-241
DOI: 10.1007/s12273-022-0942-8
Cite this article:
Zhou P, Wang S, Zhou J, et al. A modelling method for large-scale open spaces orientated toward coordinated control of multiple air-terminal units. Building Simulation, 2023, 16(2): 225-241. https://doi.org/10.1007/s12273-022-0942-8
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