Please use this identifier to cite or link to this item: http://buratest.brunel.ac.uk/handle/2438/7444
Title: Evaluation of the energy impact of PCM tiles in an Airport Terminal Departure hall
Authors: Gowreesunker, BL
Tassou, SA
Keywords: Phase change materials;HVAC systems;CFD-TRNSYS coupling
Issue Date: 2013
Publisher: Chartered Institute of Building Services Engineering (CIBSE)
Citation: CIBSE Technical Symposium 2013, Liverpool, UK, 11-12 Apr 2013
Abstract: In most past studies, passive PCM (phase change materials) systems have been tested for relatively small office spaces where the airflow is of minimal consequence in the overall energy consumption of the space. This paper on the other hand, reports on the application of PCM tiles on the floor of an Airport terminal space, similar to London Heathrow Terminal 5 departure hall, where in such large open spaces, the influence of airflow is crucial for the evaluation of the energy performance of AC units. In this paper, the evaluation of the energy performance of PCM tiles is obtained through a coupled simulation of TRNSYS and CFD. TRNSYS simulates the AC unit and PID control systems, while CFD is used to simulate the airflow and radiation inside the terminal space. The phase change process is simulated in CFD using an in-house developed model which considers hysteresis effects and the non-linear enthalpy-temperature relationship of PCMs. Although, a displacement ventilation (DV) system is actually employed at Heathrow Terminal 5, this study also compares the performance of the PCM tiles for a mixed ventilation (MV) system. Due to large computing times associated with CFD, discrete time-dependent scenarios under different UK weather conditions are used. The yearly energy demand is then determined through the heating/cooling degree day concept using base temperatures of 18 and 23 °C for HDD and CDD, respectively, similar to the comfort temperature range in the Terminal. The results show that the use of PCM tiles on the floor of the Terminal departure hall can lead to annual energy savings of around 3% for the DV system and 6% for the MV system, corresponding to 174 MWh/year and 379 MWh/year for the Terminal building.
Description: Copyright @ 2013 CIBSE
URI: http://www.cibse.org/index.cfm?go=page.view&item=2877
http://bura.brunel.ac.uk/handle/2438/7444
Appears in Collections:Publications
Mechanical and Aerospace Engineering
Dept of Mechanical Aerospace and Civil Engineering Research Papers

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