INVESTIGAÇÃO EXPERIMENTAL DA PRESSÃO DE SATURAÇÃO DO FLUIDO DE TRABALHO EM TERMOSSIFÕES

partir tubo cobre 500 mm. fluido razão preenchimento 50% volume evaporador. 210 enquanto seção adiabática condensador 20 mm 270 mm, condensador foi resfriado convecção forçada ar, seção adiabática foi isolada fibra vidro evaporador foi aquecido resistor elétrico. Abstract. A thermosyphon is a passive heat exchange device that uses the latent heat of vaporization of a working fluid. In this work, a thermal analysis of a thermosyphon was performed, comparing experimental data of saturation pressure of the working fluid with the pressure determined analytically. The thermosiphon was manufactured from a copper tube having a total length of 500 mm. The working fluid used was distilled water with a filling ratio of 50% of the evaporator volume. The evaporator has a length of 210 mm, while the adiabatic section and the condenser are 20 mm and 270 mm long, respectively. The condenser was cooled by forced air convection, the adiabatic section was insulated with fiberglass and the evaporator was heated by an electric resistor. Experimental tests were carried out for a heat load of 10 to 60 W in two different positions: at 22.5º and 45 ° from the horizontal (evaporator bellow condenser). The thermal analysis was based on the temperature distribution throughout the device, its operating temperature and thermal resistance. It was verified that the inclination of 45° performed better and presented lower internal pressure, since in this conditions, the temperatures of the device are lower than when operating in an inclination of 22.5°.