An Evaluation of Heat Transfer Coefficient in an Independent Zonal Temperature Controls with CFD

Pei Zhou; Junqi Wang; Gongsheng Huang

doi:10.1016/j.egypro.2017.03.647

An Evaluation of Heat Transfer Coefficient in an Independent Zonal Temperature Controls with CFD

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Overview

3 Scopus Citations

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Author(s)

Related Research Unit(s)

Department of Architecture and Civil Engineering

Detail(s)

Original language	English
Pages (from-to)	2260-2266
Journal / Publication	Energy Procedia
Volume	105
Publication status	Published - May 2017

Conference

Title	8th International Conference on Applied Energy – ICAE 2016
Location	Beijing, China
Place	China
City	Beijing
Period	9 - 11 October 2016

Link(s)

DOI	DOI https://doi.org/10.1016/j.egypro.2017.03.647 Final Published version
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Attachment(s)	Documents 14574742.pdf Final Published version, 797 KB, PDF Publisher's Copyright Statement This full text is made available under CC-BY-NC-ND 4.0. https://creativecommons.org/licenses/by-nc-nd/4.0/
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85020713163&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(ed36b945-b9c0-4e61-acf8-5abca6387ea6).html

Abstract

This paper introduced a methodology to calculate the heat transfer coefficient between two adjacent air conditioning zones via a virtual wall aims to improve the independent zonal temperature control for a VAV system. The selected room was divided into two subzones with each controlled by 2 square ceiling diffusers mounted on the up-ceiling level. A virtual wall was artificially identified and split into the fluid domain in Fluent. The heat transfer coefficient (HTC) across the virtual wall was derived from the discrete energy equations and obtained by implementing UDFs in the Fluent solver, both the heat transfer due to air mass flows and the heat exchange due to turbulence were considered in the model. A 2-separate VAV control platform was established in TRNSYS and the HTC was fed to the control platform to evaluate the impact of HTC on the temperature control system. The simulation results shown it has an insignificant impact on the controllers, but the temperature on both sides were controlled precisely within the expected range compared with CFD simulation results.