Studies of a thermosyphon system with a heat source near the top and heat sink at the bottom

Thermosyphon are heat transport devices that can transfer heat using gravitation. They can work without any external power supply, and have simple structures. Recently, a device which transferred heat from the hot reservoir near the top to the cold reservoir at the bottom was invented by Ippohshi et al.[1] In this study the same type of device was made and the performance was examined. Then, another type of device which was simpler to make was proposed and the performance was compared with each other. It was found that the one proposed in this study did not take time before the water in the tube circulated and that there was a possibility for applying the device to a solar water heating system which would work without a pump.