Monodraught and IES Create Dynamic Simulation of Windcatcher Natural Ventilation Systems

To help architects and consultants deliver energy-efficient, low-maintenance ventilation within the built environment, Monodraught and IES have created an innovative feature that demystifies the use of building simulation to model the performance of natural ventilation through wind tower natural ventilation systems. Modelling wind tower natural ventilation is often considered time consuming and complicated due to the difficulty in understanding and verifying the true impact of improvements achieved by incorporating systems within building designs. Conventional modelling involves constructing 3D representations of wind towers within a specific model and assigning each face with a performance factor, thus quantifying its ability to ‘catch’ air. This process is however often misunderstood and time consuming. Now, an innovative feature has been created using performance components to model Windcatcher natural ventilation systems. Each performance component is already assigned the relevant construction templates, thermal templates and MacroFlo profiles, enabling them to simulate as soon as they are positioned in the model and allowing users to explore the potential of natural ventilation as an alternative to conventional mechanical system. The simplicity of this ‘drag and drop’ feature dramatically reduces modelling times typically associated with such systems. Performance and energy savings are assessed in an open and transparent process, building confidence in the application of Windcatcher natural ventilation systems and demonstrating the true potential for natural and hybrid ventilation schemes. Additional tools provide users with an insight into the year-round performance of systems; and authentic visualisation helps architects and designers understand the aesthetics of roof-mounted systems and how best to integrate them within a building.