Autor: |
W. W. Strong |
Rok vydání: |
1913 |
Předmět: |
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Zdroj: |
Proceedings of the American Institute of Electrical Engineers. 32:1303-1314 |
ISSN: |
0097-2444 |
DOI: |
10.1109/paiee.1913.6660746 |
Popis: |
1. Since the negative corona is much more uniformly distributed about the active electrode, and on account of its greater stability as regards sparking, the negative corona discharge is much more suitable than the positive for electrical precipitation. In the precipitation chamber described (capable of cleaning about 800 cu. ft. (22.6 cu. m.) of gas per min.) the negative corona consumes about 300 watts under the best conditions for precipitation. 2. Under similar conditions of the electrical circuit the loss due to the positive corona is slightly greater than that due to the negative corona at the same voltage. 3. For values of the electric field near the sparking potential the negative corona watt loss curve is flatter than the curve for the positive corona. 4. The positive corona loss in room air and ionized furnace gases is about the same. Increasing the air velocity affects the sparking potential and the corona loss but slightly. 5. Increasing the air velocity increases the sparking potential of a negative corona in ordinary air. The corona watt loss is considerably greater in hot ionized gas than in air. 6. The positive corona tends to go over to an oscillatory spark while the negative corona is more easily changed into an arc form of discharge. 7. Since the negative corona curve is the flatter and since larger negative corona currents can be obtained, the negative corona is much better adapted for electrical precipitation than the positive corona. 8. |
Databáze: |
OpenAIRE |
Externí odkaz: |
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