Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/61509
Title: Applying a novel extra-low temperature dedicated outdoor air system in office buildings for energy efficiency and thermal comfort
Authors: Li, H
Lee, WL 
Jia, J
Keywords: Building energy simulation
Dedicated outdoor air system
Energy and exergy
Heat pipe
Office building
Thermal comfort
Issue Date: 2016
Publisher: Pergamon Press
Source: Energy conversion and management, 2016, v. 121, p. 162-173 How to cite?
Journal: Energy conversion and management 
Abstract: A novel dedicated outdoor air system consisting of a multi-stage direct expansion coil and a zero-energy heat pipe to generate extra-low temperature outdoor air to avoid moisture-related problems was proposed in this study. The proposed system's performance in achieving the desirable air conditions and better energy efficiency objectives is compared with a conventional direct expansion system for air-conditioning of a typical office building in Hong Kong based on simulation investigations. The simulations were carried out using equipment performance data of a pilot study, and realistic building and system characteristics. It was found that the proposed system, as compared to the conventional system, could reduce the annual indoor discomfort hours by 69.4%. An energy and exergy analysis was also conducted. It was revealed that the proposed system could reduce the annual air-conditioning energy use by 15.6% and the system exergy loss rate by 13.6%. The associated overall exergy efficiency was also found 18.6% higher. The findings of this study confirm that the proposed system is better than the conventional system in terms of both energy and exergy efficiency and the desirable air conditions.
URI: http://hdl.handle.net/10397/61509
ISSN: 0196-8904
EISSN: 1879-2227
DOI: 10.1016/j.enconman.2016.05.036
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