Preliminary results for salt aerosol production intended for marine cloud brightening, using effervescent spray atomization
| Autor: | Sudhanshu Jain, Jack Foster, Gary Cooper, Armand P. Neukermans, Lee Galbraith, Bob Ormond |
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| Rok vydání: | 2014 |
| Předmět: |
General Mathematics
Instrumentation Nuclear engineering Nozzle General Physics and Astronomy Salt (chemistry) Nanotechnology Cloud computing Standard deviation salt aerosol production marine cloud brightening effervescent spray atomization chemistry.chemical_classification business.industry General Engineering Articles Snow Aerosol chemistry 13. Climate action Log-normal distribution Environmental science business Research Article |
| Zdroj: | Philosophical transactions. Series A, Mathematical, physical, and engineering sciences |
| ISSN: | 1471-2962 1364-503X |
| DOI: | 10.1098/rsta.2014.0055 |
| Popis: | The large-scale production of vast numbers of suitable salt nuclei and their upward launch is one of the main technological barriers to the experimental testing of marine cloud brightening (MCB). Very promising, though not definitive, results have been obtained using an adapted version of effervescent spray atomization. The process is simple, robust and inexpensive. This form of effervescent spraying uses only pressurized water and air sprayed from small nozzles to obtain very fine distributions. While it is far from optimized, and may not be the best method if full deployment is ever desired, we believe that even in its present form the process would lend itself well to preliminary field test investigations of MCB. Measurements obtained using standard aerosol instrumentation show approximately lognormal distributions of salt nuclei with median diameters of approximately 65 nm and geometric standard deviations slightly less than 2. However, these measurements are not in agreement with those based on scanning electron microscopy imaging of collected particles, an observation that has not yet been explained. Assuming the above distribution, 10 15 particles per second could be made with 21 kW of spray power, using approximately 200 nozzles. It is envisioned that existing snow making equipment can be adapted to launch the nuclei 60–100 m into the air, requiring approximately 20 kW of additional power. |
| Databáze: | OpenAIRE |
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