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dc.contributor.supervisorSharma, Sumeet-
dc.contributor.supervisorGangacharyulu, D.-
dc.contributor.authorSingh, Deepinder-
dc.descriptionM.E. Thesisen_US
dc.description.abstractHeat pipes are known as superconductors of heat because of their fantastic heat transfer and heat extraction ability with minimum heat loss. A lot of research and experimentation has been carried out on heat pipes in the 21st century due to modernization and miniaturization of equipments. Gravitational and capillary forces play a very important role in deciding the overall performance of a heat pipe. At every different inclination, the resultant of these two forces varies, so the performance of a heat pipe also changes. So there is a need to study the performance of heat pipe at different tilt angles. This study demonstrates the effects of different heat loads on the thermal conductivity of a copper-water heat pipe. The results are presented through experimental as well as analytical method based on capillary limit of heat pipe, which are found to be in fair agreement with maximum and minimum deviations of 29.89% and 6.87% at 40 W and 100 W respectively. The present study also aims at discovering the tilt angle of the same heat pipe at which least thermal resistance is offered. A performance comparison is hence established among heat pipe inclinations, based on which it is perceived that heat pipe offers lowest thermal resistance of 0.033 ˚C/W at 25˚ tilt angle and 90 W heat input. Many different working fluids can be used inside the heat pipe. In recent times, nanoparticles are also being employed in heat pipes to improve their performance. This research work also includes the comparison in the performance of heat pipe with and without Al2O3 nanofluid. It was observed that the addition of nanoparticles inside the base working fluid significantly reduced the thermal resistance of heat pipe compared to the heat pipe operating on pure water working fluid. Hence, selecting an adequate working fluid according to heat pipe constructional material and wick properties is very necessary. The heat transfer coefficient on the external surface of heat pipe condenser section was determined by experimental method and then predicted by empirical correlations. The results from both the cases were in fair agreement with permissible deviation of ± 25%. This study was performed under free as well as forced convection.en_US
dc.subjectHeat pipeen_US
dc.subjectThermal conductivityen_US
dc.subjectThermal resistanceen_US
dc.subjectFree convectionen_US
dc.subjectTilt angleen_US
dc.subjectWick structureen_US
dc.subjectCapillary limiten_US
dc.titleExperimental Investigation of Heat Pipe Performance at Different Input Conditionsen_US
Appears in Collections:Masters Theses@MED

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