지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
The internal oxide scale of twelve superheater and reheater tubes were tested which were serviced for 30,000～120,000 hours in thermal power plants. The oxide scale was formed in three layers. The Cr-rich area was observed beneath the original metal surface. The hematite (Fe₂O₃) phase was formed on the outer surface. The intermediate layer was magnetite (Fe₃O₄). The thickness of Cr-rich layer was about half of the total scale. All layers grew during the operation hour of the plant. The thickness of thickest scale was 0.2㎜ in superheater tubes. This can increase the tube metal temperature about 7℃ more than initial state. 7℃ tube metal temperature can reduce tube life about 30%, but the boiler tube’s design margin is big enough therefore it has been analyzed that it would not effect on the life span.
목차
ABSTRACT
1. 서론
2. 보일러튜브의 구조 및 산화특성
3. 본론
4. 결론
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UCI(KEPA) : I410-ECN-0101-2013-553-001578048