With space limited in the ever growing tower blocks, chillers and other plant are being positioned in tight conditions where re-circulation and overheating could occur. This could be in the basement or high level at the roof, the challenges are ventilation and the impact of the local conditions are key areas where analysis can ensure an effective and optimised solution.
With towers becoming the staple of major cities, the designs are the facades are intending to hide the chillers and other equipment at the very top.
With detailed modelling of equipment and architectural design, the impact of cramped equipment or the design of the facade can be evaluate. For example, Computational Fluid Dynamics (CFD) analysis could answer the question - would small perforations be enough to allow sufficient airflow around chillers? Results can clearly identify any issues along with easy to understand mapping of temperature and airflow to allow the whole project team understand any potential issues.
CHILLERS WITHIN CONDENSED SPACES
Chillers, generators and other equipment are all likely to be condensed into smaller and smaller places as building spaces is becoming more valuable. With equipment stored in rooms and underground in car parks, the need to ensure adequate ventilation is essential to ensuring good performance. through minimising any re circulation and to ensure temperatures remain optimal.
Through modelling a variety of heat loads and airflow from chillers and ventilation systems, a detailed view on the performance of the chillers can be analysed and a understanding on where heat is likely to build up.
Understanding the conditions and the location at the top of towers is vital to ensuring the performance of chillers and other equipment. Through detailed modelling, including any perforated or porous materials, allows a understanding on how the airflow could impact the temperatures around equipment as well as identifying areas where re circulation could occur.
CFD modelling can simplify demonstrate these issues in the form of temperature, velocity and humidity diagrams and plots that highlight any potential problems that may have occurred during the simulation.
LOCAL WEATHER DATA
To generate a detailed CFD model, the weather data used to establish the data boundaries needs to be taken from a local source and interpolated to allow a gust curve from the current angle.
By using local weather data to the development, that has been averaged over multiple years to account for any anomalies in weather conditions, the results from the simulations can be more reliable and used to inform design decisions.