The performance of cooling towers/chillers yards/condenser units near other cooling equipment can be adversely affected by the re-circulation of the cooling tower discharge into the tower intakes. Current design strategies often account for this discharge re-ingestion issue, Chiller CFD Analysis is used to evaluate worst-case discharge recirculation effects in cooling towers/chillers performance & also to assess the effect of hot humid air on the nearby air. The bounding design values of tower intake wet bulb temperature increase due to recirculation and interference are calculated considering the various conditions of cooling tower operation, ambient temperature, humidity, wind conditions & effect of high-rise buildings in nearby surroundings.
From the 2D plan view & sectional drawings details the 3D Model is prepared for the CFD study. After preparing the 3D model of the cooling tower’s/chillers an appropriate meshing tool is used to discretize the geometry for solving. Hybrid mesh is used in Geometry. Then the meshed geometry is used for solving the flow, energy & species transport equations for different outside weather conditions.
The chiller CFD analysis is carried out for the most pre-dominant & the Worst case weather conditions. The CFD steady-state simulations were carried out with appropriate boundary conditions for each case. The temp, Velocity & Plume dispersion profiles were studied from the analysis & to analyze the placement of the cooling equipment to check their performance effect due to the re-circulation.
Velocity, temperature, and RH profiles at different sections.
Percentage of Recirculation in each cooling equipment unit.
Design changes at the installation site of these cooling equipment, if required.
Saadiyat Island Cooling tower project, Abu Dhabi, UAE.
Qatar National Museum, Doha.
ACC Units recirculation study on High Rise Buildings in Mumbai & Manila.