Experimental Study Of Atomizating Performance In Spray System On Evaporative Condenser And Engineering Application

As an energy-saving and efficient heat-exchange equipment, evaporative cooler has a broad market in the development of low-carbon economy and water saving. Evaporative cooler has huge potential to improve heat and mass transfer efficiency, and it is also unreasonable and imperfect in the selection of components and parameters matching. Spray nozzle is an important part of an evaporative cooler, its atomization characteristics directly affect the uniform distribution of spray water and affect the water film heat transfer outside the tubes. So this study carried on thorough experimental research to atomization characteristics in evaporative cooler, thus improving the condition of engineering application, the main contents of the paper are as follows:1. The experimental apparatus of nozzle performance was set up. The atomization characteristics of three types of nozzles were tested to compare the differences between three nozzles.2. The experimental apparatus about heat transfer performance of evaporative cooler heat transfer performance was built up to measure and calculate water film heat transfer coefficient outside the tube and total heat transfer coefficient with different air faced velocity and spray density. The air faced velocity and spray density affected the heat transfer performance was analyzed. Contrast experiment was tested to analyze the influence of the water distribution of different nozzles on heat transfer performanceThrough this study, a theoretical basis was provided for the water spray uniformity and heat transfer enhancement of evaporative cooler and the new spray nozzle was developed for evaporative cooler.