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 FL, FP, FH and FG 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 FG 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.
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2010 14th International Heat Transfer Conference
August 8–13, 2010
Washington, DC, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4936-1
PROCEEDINGS PAPER
Fluid to Fluid Modeling Scaling Factors of R134a-Water for Critical Heat Flux
Chang-Nian Chen,
Chang-Nian Chen
Shandong University, Jinan, Shandong, China
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Ji-Tian Han,
Ji-Tian Han
Shandong University, Jinan, Shandong, China
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Li Shao,
Li Shao
Shandong University, Jinan, Shandong, China
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Tien-Chien Jen
Tien-Chien Jen
University of Wisconsin-Milwaukee, Milwaukee, WI
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Chang-Nian Chen
Shandong University, Jinan, Shandong, China
Ji-Tian Han
Shandong University, Jinan, Shandong, China
Li Shao
Shandong University, Jinan, Shandong, China
Tien-Chien Jen
University of Wisconsin-Milwaukee, Milwaukee, WI
Paper No:
IHTC14-23417, pp. 767-772; 6 pages
Published Online:
March 1, 2011
Citation
Chen, C, Han, J, Shao, L, & Jen, T. "Fluid to Fluid Modeling Scaling Factors of R134a-Water for Critical Heat Flux." Proceedings of the 2010 14th International Heat Transfer Conference. 2010 14th International Heat Transfer Conference, Volume 1. Washington, DC, USA. August 8–13, 2010. pp. 767-772. ASME. https://doi.org/10.1115/IHTC14-23417
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