| 21. | Chilled panels cool the rising warm air, which then drops, creating a natural convection current.
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| 22. | However, all types of buoyant convection, including natural convection, do not occur in microgravity environments.
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| 23. | Natural convection causing rising warm air and falling cooler air can result in an uneven stratification of heat.
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| 24. | If there are also buoyancy effects, for example hot air rising, then natural convection can occur.
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| 25. | If the ratio is approximately one, then both forced and natural convection need to be taken into account.
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| 26. | Natural convection, aided by the wind, keeps the panels operating at temperatures comparable to conventional PV modules.
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| 27. | The tank of liquid filled transformers often has radiators through which the liquid coolant circulates by natural convection or fins.
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| 28. | Small dry-type and liquid-immersed transformers are often self-cooled by natural convection and radiation heat dissipation.
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| 29. | Natural convection has attracted a great deal of attention from researchers because of its presence both in nature and engineering applications.
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| 30. | The temperature gradient in the vertical shafts causes air to rise by natural convection, causing a draft to enter the foggara.
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