CFD Research Center, Chemical Engineering Department, Razi University, Kermanshah, Iran
Abstract
This paper reports a study on the effect of the heat flux, cooling water flow rate, fillratio and extra volume on the overall performance of a partially vacuumedthermosyphon. A rig was made from a 1 m copper tube with an inner and outerdiameter of 17.5 and 19 mm. The heights of the evaporator, the adiabatic section andthe condenser are 40, 20 and 40 cm, respectively. The temperatures at different placeson the thermosyphon and on the inlet/outlet ofthe cooling water were measured. It wasobserved that change in heat flux, fill ratio and employing different extra volumes, hasa significant effect on its performance. On the other hand, with changes in the coolingwater flow rate the performance ofthe thermosyphon was altered regarding the trappedair movement. In order to illustrate the effect ofthe existence ofair in deactivating thethermosyphon, the pipe was cooled down by disconnecting the evaporator power input.It was seen that the thermosyphon loses its performance as the trapped gas occupies thewhole condenser. The whole study shows that due to the existence ofthe trapped air, theheat loads can have significant effects on the thermosyphon performance.
Mirshahi,H. and Rahimi,M. (2009). Experimental Study on the Effect of Heat Loads, Fill Ratio and Extra Volume on Performance of a Partial-Vacuumed Thermosyphon. Iranian Journal of Chemical Engineering (IJChE), 6(4), 15-26.
MLA
Mirshahi,H. , and Rahimi,M. . "Experimental Study on the Effect of Heat Loads, Fill Ratio and Extra Volume on Performance of a Partial-Vacuumed Thermosyphon", Iranian Journal of Chemical Engineering (IJChE), 6, 4, 2009, 15-26.
HARVARD
Mirshahi H., Rahimi M. (2009). 'Experimental Study on the Effect of Heat Loads, Fill Ratio and Extra Volume on Performance of a Partial-Vacuumed Thermosyphon', Iranian Journal of Chemical Engineering (IJChE), 6(4), pp. 15-26.
CHICAGO
H. Mirshahi and M. Rahimi, "Experimental Study on the Effect of Heat Loads, Fill Ratio and Extra Volume on Performance of a Partial-Vacuumed Thermosyphon," Iranian Journal of Chemical Engineering (IJChE), 6 4 (2009): 15-26,
VANCOUVER
Mirshahi H., Rahimi M. Experimental Study on the Effect of Heat Loads, Fill Ratio and Extra Volume on Performance of a Partial-Vacuumed Thermosyphon. IJChE, 2009; 6(4): 15-26.
