Mukuna JG, The effect of different working fluids and internal.pdf (890.52 kB)
The Effect of different working fluids and internal geometries on the efficiency of evacuated tube heat pipe solar collectors
journal contribution
posted on 2022-01-07, 09:33 authored by Jean Gad Mukuna, Jasson GryzagoridisIn this study, a heat pipe was modified with designed and manufactured inserts of specific profiles in order to
investigate the effect of the internal geometries and working fluids on the efficiency of the evacuated tube heat
pipe solar collector. The experimental rig was made of a mobile frame, an insulated water tank, a solar simu-lator and an evacuated tube heat pipe. Using an average irradiance of 700 watts per square meter, the indoor
tests were conducted first on a heat pipe without any working fluid (dry mode) and later on the heat pipe
containing, in turn, each of the six working fluids for each of the five geometries. Results show that, when in-serting different profiles in the heat pipe, there is an enhancement of the heat transfer and hence an increase
in the efficiency of the evacuated heat pipe solar collector.