Boiler
A boiler has an upper header, a lower header and a heat-transfer tube. The heat-transfer tube connects the upper header with the lower header. The hear-transfer tube is provided with projections such that a heat-transfer area per unit length of the heat-transfer tube is smaller in an upstream region...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A boiler has an upper header, a lower header and a heat-transfer tube. The heat-transfer tube connects the upper header with the lower header. The hear-transfer tube is provided with projections such that a heat-transfer area per unit length of the heat-transfer tube is smaller in an upstream region than that in a downstream region of combustion gas. |
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