Improving the efficiency performance of heat pipes using alumina containing nano-fluids [Alimüna içeren nanoakişkan kullanilarak isi borularinin performanslarinin iyileştirilmesi]

The present study aims to improve the efficiency of the heat pipe (without wick) using nano-fluid containing al2o3 (alumina) nanoparticles at a concentration of 2% (v/v). for this purpose,an experimental setup comprised of a copper pipe of 1 m length and 13 mm diameter was prepared. the evaporator section was 40 cm long. an electrical spiral heater was wrapped around that section as the heat source and the whole section was completely insulated. a 20 cm section was assigned as the adiabatic section and the remaining 40 cm of the pipe was the condenser section. a continuous parallel flow cooling heat exchanger was used around the condenser to remove heat from the system. temperature measurements were made at four locations at the evaporator and the condenser sections. the transfer of heat from the pipe in the condenser section was determined using three different fluid mass flow rates (5 g/s,7.5 g/s ve 10 g/s) and the heat in the evaporator section was provided at three different power (200w,300w ve 400w) settings. the experiments were conducted by placing the setup at two different inclination angles. the effect of the working fluid on the efficiency performance of the heat pipe was thus experimentally determined.