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Title: Experimental Investigation of Heat Pipe with Annular Fins Under Natural Convection At Diffrent Inclinations
Authors: Singh, Sanjay
Supervisor: Sharma, Sumeet
Gangacharyulu, D.
Issue Date: 27-Jul-2018
Abstract: Heat pipe are also characterised as superconductor of heat because of their excellent heat transfer and heat removal ability with minimum heat loss. Numerous research and experimentation has been conducted on heat pipe in 21st century due to rapid advancement of electronics equipment’s. Gravitational and capillary force play a vital role in thermal performance of heat pipe. In this scenario, cooling of electronics component is a major task in today engineering studies. The operation of several engineering system results in generation of heat. This may cause several overheating problems and lead to failure of the system. To overcome this problem and to achieve desired rate of dissipation as when fins or extended surface are utilizing. So there is need to study the performance of heat pipe with annular fins under free convection at different inclination. This study demonstrates the effect of different mass flow on the condenser heat transfer coefficient with annular fins under natural convection at different inclinations. In this study annular fins are used for the experimental work dimensions of which are length of fin, thickness and spacing of fin 10mm, 1mm and 6mm respectively. The main aim of present study was too discovered at what inclination angles give maximum heat transfer coefficient. 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 obtained from experimental and Churchill and Chu for laminar were in fair agreement with not more than 22% deviation. It was elucidated the maximum heat transfer coefficient of 31.2 W/m2-K at 25˚ tilt angle and minimal condenser heat transfer coefficient of 26.4 W/m2-K was seen at 45˚ tilt angle and 200 ml/min mass flow rate. It has concluded, that mass flow rate is linearly proportional to heat transfer coefficient. Inclination angle also effect the thermal performance of heat pipe. Beyond 25˚ inclination heat transport rate starts decreases due to may be poor driven buoyancy force. Keywords: Heat pipe, Annular fins, Free convection, Condenser heat transfer coefficient, Tilt angle
Appears in Collections:Masters Theses@MED

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