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ISSN Печать: 0276-1459
ISSN Онлайн: 1943-6181
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DEVELOPMENT OF A NEW LARGE-FLOW-RATE AND EFFICIENT MIST GENERATOR, AND ITS APPLICATION TO AIR COOLING IN GREENHOUSES
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A new large-flow-rate mist generator of less energy consumption has been developed in this study. The mist generator is categorized as two-fluid-type, but no water pump is required if pressurized air alone is supplied because water is automatically suctioned by vacuum pressure arising behind a sphere or an orifice in the mist generator. Several types of mist generators with sphere or different orifice sizes, etc. have been produced and tested in order to find the best specifications. In the tests, mist generation rate, air supply rate, and air pressure at the inlet of the mist generator were measured to evaluate the pneumatic power which is needed to select an air source. From the ratio of the mist generation rate to the pneumatic power and the droplet size, the optimum type was determined. Furthermore, as an example of practical uses for the mist generator, air-cooling tests in a greenhouse were conducted in the daytime and evening, in midsummer as well as late fall. The test results in the daytime in midsummer showed that the room temperature in the house fell from 50 to 30C. These test results and the details of the mist generator are reported in this paper.
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