Dilute aqueous solutions of alcohols with large number of carbon atoms

due to their properties associated to an anomalous dependency of the surface tension with temperature

can be prepared as self-rewetting fluids.In this study

experimental investigation was conducted to explore heat transport capability of heat pipe working with self-rewetting fluid[0.1%(mass) heptanol aqueous solution].Under different heat loads and different orientations(vertical and horizontal orientation)

the heat transport capabilities of heat pipe with the self-rewetting fluid and water were compared.The results show that with the increase of heating power

the heat transport capability of heat pipe is enhanced by using the self-rewetting fluid.In the horizontal heating mode

without the influence of gravity

the enhancement of heat transfer is more evident.Compared with water

the self-rewetting fluid presents significantly better heat transport capability.