Thermosyphon effect in parabolic trough collector systems

Thermosyphon effect is a natural convection phenomenon that gives a fluid the possibility to circulate inside a closed loop without any external pump sources. Numerical and simulation analysis are driven to check the behavior of thermosyphon effect in different heat transfer fluids, using parabolic trough collectors as the heating section of the system. Also, convection and radiation losses are considered. Simulations show variations in fluids density caused by different temperature and specific heat values, altering the velocity of the fluid inside the system with the same initial conditions.