CAJ | 학술논문

为了探究结构参数对空冷元件流动传热特性的影响规律，为空冷凝汽器优化选型提供参考，通过实验室性能试验，研究不同结构尺寸的单排管直接空冷换热元件的热动力性能。结果表明：迎面风速增加，单排管空冷元件传热系数增大，空气阻力亦随之增大；在元件结构参数基本相同的前提下，迎面风速一定，随着翅片厚度减小，空气阻力降低，换热效果增强。据此，将单排管空冷元件与双排管空冷元件的流动换热特性进行技术对比，发现在工程设计常用的迎面风速下，单排管空冷元件与双排管空冷元件的换热系数相当，而单排管空冷元件的阻力明显小于双排管。
위료탐구결구삼수대공랭원건류동전열특성적영향규률，위공냉응기기우화선형제공삼고，통과실험실성능시험，연구불동결구척촌적단배관직접공랭환열원건적열동력성능。결과표명：영면풍속증가，단배관공랭원건전열계수증대，공기조력역수지증대；재원건결구삼수기본상동적전제하，영면풍속일정，수착시편후도감소，공기조력강저，환열효과증강。거차，장단배관공랭원건여쌍배관공랭원건적류동환열특성진행기술대비，발현재공정설계상용적영면풍속하，단배관공랭원건여쌍배관공랭원건적환열계수상당，이단배관공랭원건적조력명현소우쌍배관。
This paper aimed to explore the emphasis law of structure parameter on flow and heat transfer characteristics of the direct air-cooling heat exchanger elements and put forward guiding references for op-timization design for air-cooling condensers.The thermodynamic performance of single-row-tube direct air-cooling heat exchanger elements with different structural parameters was experimentally studied in labora-tory scale.The results show that,the heat transfer coefficient and the air resistance increased with the fa-cing velocity.On the premise of the elements structural parameters were basically the same,with a constant facing velocity,the air resistance decreased and the heat transfer coefficient increased with the decreasing fin thickness.Thus,the flow and heat transfer characteristics of the air-cooling elements of single-row-tube and double-row tube were compared.It finds that,within the range of facing velocity that engineering de-sign commonly used,the heat transfer coefficient of the above two types of elements was almost equiva-lent,while the air resistance of the single-row-tube air-cooling elements was significantly smaller than that of the double-row-tube air-cooling elements.