CAJ | 학술논문

提出采用锚型导液器消除水平管束外膜状凝结换热管束效应的方法，通过对比试验研究了导液器对HFC245fa水平管束外膜状凝结换热特性的影响。设计了带锚型导液器的试验管束，试验管束由4列排深为5排的列管构成，试验换热管包括光管、二维肋管与三维肋管，试验换热管公称外径均为19.05 mm。结果表明：①锚型导液器可有效控制管束效应对光管与三维肋管外膜状凝结换热影响，使排深为5处光管与排深为4处三维肋管冷凝传热系数分别提升33%与80%；②锚型导液器对管束中单管冷凝换热性能的影响可忽略；③加装锚型导液器可使DN600卧式光管（或三维肋管）管束降低管材消耗20%（或30%）以上。
제출채용묘형도액기소제수평관속외막상응결환열관속효응적방법，통과대비시험연구료도액기대HFC245fa수평관속외막상응결환열특성적영향。설계료대묘형도액기적시험관속，시험관속유4렬배심위5배적렬관구성，시험환열관포괄광관、이유륵관여삼유륵관，시험환열관공칭외경균위19.05 mm。결과표명：①묘형도액기가유효공제관속효응대광관여삼유륵관외막상응결환열영향，사배심위5처광관여배심위4처삼유륵관냉응전열계수분별제승33%여80%；②묘형도액기대관속중단관냉응환열성능적영향가홀략；③가장묘형도액기가사DN600와식광관（혹삼유륵관）관속강저관재소모20%（혹30%）이상。
Tube row effect, part of the inundation effect induced by falling condensate formed on neighboring tubes above, has hindered the heat transfer of shell and tube condenser for a long time. This paper put forward a scheme to eliminate the tube row effect by anchor-type ducts and further investigated its effect on film condensation heat transfer coefficient (CHTC) of HFC245fa on the tube bundles. A 4-line-wide and 5-row-deep tube bundle consisting of smooth tubes and finned tubes, with two columns out of the four equipped with the anchor-type ducts, was built in the test section. Equivalent outside diameter and active length of all tubes in the test section were 19.05 and 500 mm, respectively. The modified Wilson plot method was used to determine the waterside convection heat transfer. The short-period-calibrate method and homogenous method were used to determine the tube row effect with high-precision. Results show that: ① tube row effect can be well controlled by the anchor-type ducts; ② adverse effect of anchor-type duct on CHTC of each tube in the bundle is negligible;③ with the anchor-type duct, more than 20%(or 30%) of smooth tubes (or enhanced tubes with three dimension fins) can be saved for a tube bundle in a shell-tube condenser of diameter 600 mm. This paper can be used to guide the design of high efficiency shell-tube condenser.