the relationship between the thermosyphon a case modifying the inclination angle of evaporator and condenser sections 0 60 90o temperature =80 oC Using R-134a, as working fluid lengths 300 mm the thermal resistance is found to be decreased compared to a case modifying the inclination angle of evaporator and condenser sections 90°can transfer heat pipe thermosyphon a better angle evaporator and condenser sections, 0 60o