Experimental study on spray cooling performance of pressure atomizing nozzle

Abstract

Aiming at the problem of air-cooled condenser output limit, a spray humidification system was presented to reduce the inlet air temperature. The pressure atomizing nozzle TF8 was chosen for inlet air spray cooling, and the spray cooling experiment with different layouts of nozzles were conducted. Through heat and mass transfer analysis, the cooling effect fitting correlation was acquired with evaporative cooling being the major cooling mechanism. The experimental results under different nozzle layouts show that when the product of dry ball and wet ball temperature difference and spray rate is smaller than 75,°C·m³/h, opening the TF8 nozzles in row 1 and row 2 (row distance is 500, mm) has better cooling effect than those in row 1 and row 3 (row distance is 1 000 mm), while when the product is larger than 75,°C·m³/h, opening the TF8 nozzles in row 1 and row 3 is superior in cooling effect to those in row 1 and row 2.

Keywords

pressure atomizing nozzle / spray cooling / fitting correlation / nozzle layout

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