## Abstract Nucleate boiling heat transfer coefficients were measured on a horizontal heated wire during the pool boiling of nonβazeotropic mixtures of ammonia/water. The experiment was carried out at pressures of 0.4 and 0.7 MPa, at heat fluxes below 2.0 Γ 10^6^ W/m^2^, and over a range of mass fr
Bubble behavior and heat transfer during pool boiling of binary mixtures
β Scribed by Toshiaki Inoue; Masanori Monde; Emiko Yamagawa
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 758 KB
- Volume
- 34
- Category
- Article
- ISSN
- 1099-2871
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β¦ Synopsis
Heat transfer coefficients were measured during pool boiling of binary mixtures on a heated wire hung horizontally and bubble behavior was simultaneously captured with a high-speed video camera. The experiment was carried out at a pressure of 0.4 and 0.7 MPa for the whole range of mass fractions in a binary mixture of R22/R11. We clarified the change in bubble behavior and heat transfer by measuring the bubble departure diameter, frequency and growth rate on the basis of the video images. Furthermore, we discussed the relationship between the bubble behavior and the boiling heat transfer coefficient in the binary mixtures.
π SIMILAR VOLUMES
A correlation of nucleate pool boiling heat transfer coefficients in ammonia/water mixtures was proposed on the basis of measured heat transfer data on a horizontal heated wire. The correlation was derived using both the fraction difference between vapor and liquid, y 1x 1 , and the temperature diff
## Abstract A model based on first principles is presented to compute nucleate boiling heat transfer coefficients. It includes microscale heat and mass transfer phenomena in the soβcalled micro region, i.e., the thin film area where the liquid vapor phase interface approaches the wall. The model is