中南大学学报（自然科学版）2018，Vol.49Issue(3)：741-746,6.DOI:10.11817/j.issn.1672-7207.2018.03.030
水平微肋管内有机工质R245fa的沸腾换热性能
Flow boiling heat transfer characteristics of R245fa in horizontal micro-fin tube
摘要
Abstract
To intensify the heat transfer process of evaporator in organic Rankin cycle (ORC), flow boiling heat transfer characteristics of R245fa in a horizontal micro-fin tube were tested. The results show that boiling heat transfer coefficient increases with the increase of mass velocity of R245fa, while it decreases with the increase of saturation temperature and heat flux density. With the increase of vapor quality, boiling heat transfer coefficient reaches the maximum at a critical vapor quality. The critical vapor quality is about 0.4, and it is varied according to the operating conditions. When vapor quality is larger than the critical value, heat transfer coefficient can be promoted more remarkably at higher mass velocity or lower saturation temperature. Among the four widely used correlations, KANDLIKAR correlation has high forecast accuracy, the deviation between the forecast value and 91.6% of experimental values is within ±25%, and the absolute mean deviation is 11.2%.The correlation is more precise to predict boiling heat transfer coefficients, and it can be used for the design of evaporator in ORC.关键词
微肋管/R245fa/沸腾换热/预测关联式Key words
micro-fin tube/R245fa/flow boiling/prediction correlations分类
能源科技引用本文复制引用
王志奇,刘力文,贺妮,夏小霞,彭德其,张建平,明镇洋..水平微肋管内有机工质R245fa的沸腾换热性能[J].中南大学学报（自然科学版）,2018,49(3):741-746,6.基金项目
国家自然科学基金资助项目(51405415) （51405415）
湘潭大学博士基金资助项目(13QDZ04) (Project(51405415) supported by the National Natural Science Foundation of China （13QDZ04）
Project(13QDZ04) supported by the Scientific Research Foundation for Doctors of Xiangtan University) （13QDZ04）
