Abstract
The heat pipe is a very effective device in heat transport, therefore it is used in many industrial applications especially in cooling systems. In the present experimental work, wickless heat pipe(thermosyphon)is designed and constructed from a copper tube of inside and outside diameters (13.5) and (15.5)mm respectively with total length of (600)mm divided into three sections evaporator; adiabatic section and a finned air cooled condenser simulating the actual applications in practice of this device. Pure water, pure hydrocarbon fluid (acetone) and mixtures of the two fluids at different ratios by weight were used as working fluid to investigate the effect of a working fluid type and mixture ratio on the performance of the device. Results show that using pure fluid is more effective than using mixture. Comparison between results of the present work and a theoretical correlation shows a good agreement especially when using pure fluid. Keywords: Thermo syphon; Heat pipe; Mixture.
Highlights
Due to advancing technology in electronic equipment and other applications such as air space crafts, air conditioning and refrigeration systems where heat dissipation is very important, the use of heat pipe is very effective
It is divided into three sections; the evaporator where heat is supplied to the device from a heat source, adiabatic section and a condenser where heat is dissipated to heat sink
Nutaphan etal[5] carried out a set of experimental tests to investigate the critical heat flux due to flooding limit of wickless heat pipe using mixturs of working fluid
Summary
Area Bond number Constant used in Eq.. Specific heat capacity Factor used in Eq.. Gravitation acceleration heat transfer coefficient Experimental heat transfer coefficient Latent heat of vaporization Inside Diameter Thermal conductivity Factor used in eq..
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