Optimization Measures for the Utilization of Solar Chimneys in Regions with Temperate Climate
Abstract
Different optimization measures have been investigated and evaluated to improve the ventilation effectiveness of the solar chimney concept for natural ventilation of buildings in regions with temperate climate. Improvement measures include an optimization of the chimney geometry, improvement of the absorber system as well as the additional use of waste heat by integrating a heating circuit into the absorber wall. All measures have been investigated with building simulations for the course of a year. The air volume flow inside the solar chimney has been investigated with computational fluid dynamic simulations (CFD) and measurements at test facilities regarding the applied measure, respectively. The solar chimney concept could replace common mechanical ventilation systems and therefore save energy and reduce greenhouse gas emissions. The present study gives an overview of the different measures and their impact on the ventilation effectiveness of the natural ventilation with solar chimneys.