CFD Validation of Nozzle Performance for Chilled Beam Design

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Price Industries is a market leader in supplying air distribution, critical controls and noise control products. Oneof their products, a chilled beam, is a cooling/heating device that uses high velocity nozzles to draw room airthrough an air/water heat exchanger. It is important to achieve as much mixing of the air through the coil aspossible so Price Industries is interested in changing the shape of the nozzles from a traditional circular shapeto optimize the design of the chilled beam unit. They have recently conducted physical experiments toinvestigate the effect of nozzle shape on the air flow, which has proven to produce very complex turbulent flowfields. Price has a dedicated team that uses Computational Fluid Dynamics (CFD) to validate the design of airdistribution systems in a wide range of commercial and industrial spaces and for innovative research productdevelopment support. It is important for the company to be able to accurately predict the flow from the nozzlein a chilled beam in order to simulate the air distribution system using CFD. It is unlikely that the simpleturbulence model that Price currently uses in their CFD simulations will be able to capture the complexturbulent flow that is produced from a non-circular jet. Price requires some investigation and guidance on themost effective and efficient CFD method in order to accurately capture this complex flow field. This researchwill evaluate the effectiveness of several CFD methods for modelling the nozzle outflow for various nozzleshapes and provide recommendations to improve the CFD modelling for the chilled beam nozzle design. Thiswork will support Price Industry by potentially reducing the time required to introduce new HVAC products tothe market as new designs can be tested first using numerical simulations using their improved CFDmethodology.