Conference Paper

Proceedings of Building Simulation 2019: 16th Conference of IBPSA

     

Parametric Study of Air Re-entrainment within Air-Cooled Chiller Compounds

Bryony Watson 1, Julien de Charentenay 2
1 Heriot-Watt University, United Kingdom
2 RED Engineering Design Ltd., United Kingdom

DOI: https://doi.org/10.26868/25222708.2019.210349
Abstract: Air cooled chillers serving high building cooling loads such as data centre are prone to air re-entrainment. As air re-entrainment is deemed to be specific to each project, it is customary to either ignore it or allow a nominal amount based on past experience at concept stage. This parametric study uses Computational Fluid Dynamics (CFD) to evaluate principal components affecting air re-entrainment within air-cooled chiller compounds. Results shows that air re-entrainment increases with wind speed and that at highest wind speed air re-entrainment is linearly dependent on plant compound length. These linear relationships, which are deemed to be adequate for plant compound with heat rejection density between 15 and 25kW/m2, can be applied at concept design to provide an early estimate of air re-entrainment.
Keywords: CFD, air cooled chillers, design conditions, air re-entrainment, overheating
Pages: 600 - 607
Paper:

BS2019_210349