标题：FLUID TO FLUID MODELING SCALING FACTORS OF R134a-WATER FOR CRITICAL HEAT FLUX
作者：Chen, Chang-Nian; Han, Ji-Tian; Shao, Li; Jen, Tien-Chien
作者机构：[Chen, Chang-Nian; Han, Ji-Tian; Shao, Li] Shandong Univ, Sch Energy & Power Engn, Jinan 250061, Shandong, Peoples R China.
会议名称：14th International Heat Transfer Conference
会议日期：AUG 08-13, 2010
来源：PROCEEDINGS OF THE ASME INTERNATIONAL HEAT TRANSFER CONFERENCE - 2010, VOL 1: BIO HEAT TRANSFER, BOILING HEAT TRANSFER, COMPUTATIONAL HEAT TRANSFER
关键词：critical heat flux; fluid to fluid modeling scaling factors; boiling; heat transfer; R134a
摘要：A series of calculations of the critical heat flux (CHF) fluid to fluid modeling scaling factors were performed to obtain relative data between R134a and water for CHF modeling method. The pressure range of R134a used in calculation was 0.15-3.59Mpa (liquid-gas density ratio 172.45-2.88), water-equivalent pressure range 1-20Mpa. Based on Ahmad model and Y. Katto model, four modeling scaling factors F-L, F-P, F-H and F-G were determined. According to the thermophysical properties of saturated R134a and saturated water, data near triple point and critical point temperature were discarded. The middle values were obtained by using a data interpolation or data fitting method, and 23 pairs of data in total were used in the whole calculation process. From the analysis of the calculation results, it was determined that the difficulty in performing CHF experiments would be drastically reduced by 70%-80% and costs reduction by about 80%, using R134a as modeling fluid. Considering the difference between the two kinds of F-G derived by Ahmad model and Y. Katto model, an average method was developed to apply for modeling technique, which works well for CHF prediction at higher mass flux conditions in helically-coiled tubes.