Thermal efficiency of heat pipe with alumina nanofluid

Thermal performance and efficiency of a thermosyphon heat pipe working with a biologically ecofriendly nanofluid

“…Noticeably, the major thermal resistance in evaporator section is due to the formation of liquid/vapor layer near the solidliquid surface which dramatically reduces the heat transfer rate, but for nanofluids, they tend to bombard the generated vapor, therefore, lower thermal resistance can be seen for nanofluids in comparison with base fluid. Likewise, experimental results showed that the applied heat flux has another striking role on thermal efficiency of heat pipe which is coped which is in accordance with those results reported by Teng et al [33]. Thermal efficiency for thermosyphon heat pipe is defined as the ratio of cooling capacity rate of water at the condenser section to the quantity of heat applied into the evaporator section.…”

Thermal characteristics studies on sintered wick heat pipe using CuO and Al2O3 nanofluids

“…The authors concluded that the size variation in nanoparticles affected the thermal performance of heat pipe. Teng et al [16] pointed out that the thermal efficiency of mesh wick heat pipe improved with the addition of 1 wt.% of Al 2 O 3 nanoparticles. More over the suspension of nanoparticles reduced the charged amount of working fluid from 60% to 20%.…”

Thermal Characterisation of Micro Flat Aluminium Heat Pipe Arrays by Varying Working Fluid and Inclination Angle

“…It has been widely accepted that an insufficient or excessive inclination angle could harm the heat pipe performance [30]. An insufficient inclination angle may induce a poor return of backflow to the evaporator [52], while an excessive inclination angle will reduce the heat dissipation efficiency by decreasing the heat exchange time at the condenser [31,52]. However, a quantitative prediction of the optimal inclination angle is still lacking.…”