The annular space in an annular heat pipe increases the capillary sorption limit which is donimant among various limits by which the maximum heat transfer rate is determined.
The equation of the capillary sorption limit for horizontal operation is ...
The annular space in an annular heat pipe increases the capillary sorption limit which is donimant among various limits by which the maximum heat transfer rate is determined.
The equation of the capillary sorption limit for horizontal operation is derived from the Navier Stokes equation and Darcy's law by neglecting inertia terms and the gravity effect.
A 120 cm-ling annular heat pipe which consists of 100 mesh stainless steel screen and copper tube with water as the working fluid is made for experiment.
Comparison of the experimental data with the analytical results is in a good agreement and shows the possibility of applications of the annular heat pipe and some problems for further study.