Summary
Using a purpose-built indoor rig that keeps weather effects out, the authors measured how collector slope, chimney height and collector area affect heat transfer and airflow in a solar chimney. Secondary flows under the collector turn out to waste most of the heat, so under 9% of the input energy reaches the chimney. Collector angle governs these flows, and enlarging the collector reduces efficiency.
Description written by Solar Tower. The original abstract is available from the publisher via the link below.