Wind-Augmented Heat Transfer in an Open Thermosyphon Tube With Large Length-Diameter Ratios

The paper reports an experimental study of the open thermosyphon tube when its heat transfer performance is augmented by the prevailing wind flowing down the inside of an insert tube concentric with the thermosyphon tube. Data are presented for the large length-diameter ratios characteristic of geotechnical applications. A flow model is developed and used to interpret these and other results. Comparisons are made with the performance of liquid-filled thermosyphons.