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.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2012.6
- 수록면
- 14 - 17 (4page)
이용수
초록· 키워드
오류제보하기
The Characteristics of heat transfer and pressure drop in a concentric heat exchanger with inner tube was investigated by using a commercial CFD program. Four different inner tubes were studied. Bare tube has no fin and SPL 1, 2 and 3 have fin spirally attached on their surface. In case of SPL 1 & 3, the fin pitch is same with 1.18mm and the fin shape is triangular. However, the fin height is 1.00mm and 1.20mm for SPL 1 & 3, respectively. The fin height of SPL 2 is 1.05mm and the fin shape looks like an airfoil.
The fin pitch of SPL 2 is 1.05mm. For all inner tubes with fin, the heat transfer rate increased from 1.8 to 2.3 times and the pressure drop increased from 5.5 to 8.6 times bare tube. SPL 3 with the highest fin height of 1.20mm showed the largest heat transfer rate, also the pressure drop increased significantly. It is seen that SPL 2 shows the best heat transfer and pressure drop characteristics, since SPL 2 showed similar heat transfer rate with SPL 3 but lower pressure drop by 17% than SPL 3. Since heat transfer and pressure drop strongly depend on the fin geometry of inner tube and have a trade-off relationship, the fin geometry should be selected for its application and condition.
The fin pitch of SPL 2 is 1.05mm. For all inner tubes with fin, the heat transfer rate increased from 1.8 to 2.3 times and the pressure drop increased from 5.5 to 8.6 times bare tube. SPL 3 with the highest fin height of 1.20mm showed the largest heat transfer rate, also the pressure drop increased significantly. It is seen that SPL 2 shows the best heat transfer and pressure drop characteristics, since SPL 2 showed similar heat transfer rate with SPL 3 but lower pressure drop by 17% than SPL 3. Since heat transfer and pressure drop strongly depend on the fin geometry of inner tube and have a trade-off relationship, the fin geometry should be selected for its application and condition.
목차
ABSTRACT
1. 서론
2. 수치 해석 모델 및 지배방정식
3. 해석 결과 및 고찰
4. 결론
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UCI(KEPA) : I410-ECN-0101-2013-553-002608827