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.**They have a dedicated team that uses Computational Fluid Dynamics (CFD) to simulate air distribution**systems in a wide range of commercial and industrial spaces and for innovative research product development.**One of their products, a chilled beam, is a cooling/heating device that uses high velocity nozzles to draw room**air through an air/water heat exchanger. It is important to achieve as much mixing of the air quickly as**possible, so Price Industries is interested in changing the shape of the nozzles from a traditional circular shape**to optimize the design of the chilled beam unit. They have recently conducted physical experiments to**investigate the effect of nozzle shape for single and twin jets, which has proven to produce very complex**turbulent flow fields. It is important for the company to be able to accurately predict the flow from the nozzle**in order to simulate the in a chilled beam air distribution system using CFD. An Engage research project was**conducted to evaluate the effectiveness of several CFD methods for modelling the nozzle outflow from a single**jet for various nozzle shapes and provide recommendations to improve the CFD modelling. Building off this**work, we aim to extend the modelling efforts to evaluate the effectiveness of several CFD methods for**modelling twin jets for various nozzle shapes and spacing. Once validated the CFD simulations will be**extended to an array of nozzles and time permitting, an entire chilled beam unit in a room. Recommendations**will be made to Price Industries regarding the placement of the nozzles to optimize jet mixing as well as the**most appropriate CFD model to use. This work will support Price Industries by potentially reducing the time**required to introduce new HVAC products to the market, as new designs can be tested first using numerical**simulations using their improved CFD methodology.