| 1. | In a nuclear reactor, natural circulation can be a design criterion.
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| 2. | Natural circulation should bring in enough fresh air for quite a few people.
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| 3. | Systems of natural circulation include tornadoes and other ventilation.
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| 4. | This natural circulation of air is supposed to keep moisture from accumulating in the storage space.
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| 5. | The concept of a natural circulation plant was relatively new when the Navy requested this design.
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| 6. | Nobody knows what the natural circulation is; I would guess 40, 000 to maybe 50, 000.
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| 7. | A fluid system designed for natural circulation will have a heat source and a heat sink.
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| 8. | In addition, please permit me to call attention to Wikipedia : Articles for deletion / Natural circulation.
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| 9. | The forced circulation boiler begins the same as a natural circulation boiler, at the feed water pump.
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| 10. | Some solar water heaters use natural circulation.
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