A Dimensionless Correlation for Heat Transfer in Forced Convection Condensation

Optimized design of a heat exchanger for an air-to-water reversible heat pump working with propane (R290) as refrigerant: Modelling analysis and experimental observations

“…Nan and Ferreira [8] investigated the heat transfer coefficients in evaporation and condensation in smooth, micro fin and crosshatched outside diameter copper tubes of 9.52 mm using R290 as refrigerant. The authors compared the experimental data with different correlations for smooth tubes, and their results confirmed that the Shah [9] and Cavallini-Zecchin [10] correlations provide the most reliable heat transfer coefficients.…”

Numerical analysis of the two-phase heat transfer in the heat exchanger of a mixed refrigerant Joule–Thomson cryocooler

“…Based on the conclusions drawn by Ardhapurkar et al [14], the correlation of Cavallini and Zecchin [17] is employed for calculating the condensation heat transfer coefficients. Cavallini and Zecchin [17] correlation for condensation is a modified form of the well-known Dittus-Boelter correlation. This is given by:…”

Investigation of empirical correlations on the determination of condensation heat transfer characteristics during downward annular flow of R134a inside a vertical smooth tube using artificial intelligence algorithms

“…Generally, empirical methods have been used to compute the condensation heat transfer coefficients and pressure drops in tubes. Most of these proposed models are modifications of the Dittus-Boelter single-phase forced convection correlation [39], as in Akers et al [40], Cavallini and Zecchin [41], and Shah [42].…”

“…(12), by Lockhart and Martinelli [44] for their parameter in Eq. (14), by Dobson and Chato [41] for the form of Lockhart and Martinelli's [44] parameter with specific constant numbers in Eq. (10) and by Cavallini et al [46,47] for the usage of Bond and Froude numbers together in Eqs.…”

“…He also offered a correlation for wavy flow. Cavallini et al [61] developed a semi empirical correlation for the condensation of various organic refrigerants in both vertical and horizontal orientations. Fujii [62] developed the following correlation for smooth tubes.…”