대한설비공학회:학술대회논문집 (Proceedings of the SAREK Conference)
- 대한설비공학회 2009년도 하계학술발표대회 논문집
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- Pages.266-271
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- 2009
전열관 배열에 의한 고온재생기 열적 성능 변화
Effect of Arrangement of Heat Transfer tube on the Thermal Performance for the High Temperature Generator
- Lee, In-Song (Graduate School, School of Mechanical Engineering, Sungkyunkwan University) ;
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Cho, Keum-Nam
(School of Mechanical Engineering, Sungkyunkwan University)
- 발행 : 2009.06.25
초록
The present study numerically investigated the effect of the geometry of the flattened tube on the thermal performance of a high temperature generator (HTG) of a double effect LiBr-water absorption system. The heat transfer tubes of the HTG were arranged behind a metal fiber burner. The heat transfer of the tubes of HTG were consisted with a set of circular and flattened tubes in series. FLUENT, as a commercial code, was applied for estimating the thermal performance of the HTG. Key parameters were the tube arrangement in the HTG. Temperature and velocity profiles in the HTG were calculated to estimate the thermal performance of the HTG. The heat transfer rate of a HTG tube was increased, and the gas temperature around the flattened tube was decreased as the pitch ratio was increased. The heat transfer rate for the circular tube bundle with the pitch ratio of 2.48 were larger by 10% respectively than that of 2.10 and the heat transfer rate for the flattened tube bundle with the pitch ratio of 1.88 were larger by 36% respectively than that of 1.63.