This article presents saturated critical heat flux results in an aluminium heat sink at high saturation temperatures. The test section is made up of seven rectangular mini-channels that are 1.0 mm deep and 2.0 mm wide, with a heated length of 25 mm. R134a has been used as the working fluid. The effect of mass flux G (ranging from 150 up to 330 kg/m2 s) has been investigated. All tests have been performed at medium to high saturation temperatures, ranging from 25 °C up to 70 °C. The experimental results showed that the saturation temperature had only a mild influence on the CHF, at each mass flux imposed. On the contrary, when increasing the mass flux at a given saturation temperature, the critical heat flux was observed to increase significantly. Finally, the prediction capability of a well-known critical heat flux correlation has also been tested.
Experimental investigation on saturated critical heat flux of refrigerant R134A at high saturation temperatures
Vanoli G. P.;
2015-01-01
Abstract
This article presents saturated critical heat flux results in an aluminium heat sink at high saturation temperatures. The test section is made up of seven rectangular mini-channels that are 1.0 mm deep and 2.0 mm wide, with a heated length of 25 mm. R134a has been used as the working fluid. The effect of mass flux G (ranging from 150 up to 330 kg/m2 s) has been investigated. All tests have been performed at medium to high saturation temperatures, ranging from 25 °C up to 70 °C. The experimental results showed that the saturation temperature had only a mild influence on the CHF, at each mass flux imposed. On the contrary, when increasing the mass flux at a given saturation temperature, the critical heat flux was observed to increase significantly. Finally, the prediction capability of a well-known critical heat flux correlation has also been tested.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.