Air-Side Heat Transfer and Friction Correlations for Flat-Tube Louver-Fin Heat Exchangers

The generalized correlations [41, 58, 59, 62] show an excellent agreement with the experimental values reported by Kays and London for the '1/4(b)-11.1' core.

“Practically, these correlations show an excellent agreement with those reported by Kays and London [40], as shown in Figure 6.”

Park and Jacobi tried to generalize j and f correlations for all the louver-fin types by considering most of the previous experimental data of 126 cores.

“In addition, Park and Jacobi [41] tried to generalize j and f correlations for all the louver-fin types by considering most of the previous experimental data of 126 cores.”

Park and Jacobi used 126 different geometries to develop f- and j-factor correlations for louvered fin heat exchangers.

“Park and Jacobi [41] used 126 different geometries to develop f -and j -factor correlations for louvered fin heat exchangers”

Park and Jacobi gathered the experimental data from previous works in addition to their new heat exchanger cores.

“They gathered the experimental data from previous works [3, 48, 53, 54, 58, 59, 61, 62, 68, 69] in addition to their new heat exchanger cores.”

Figure 5 shows that the correlation error differences among studies (Park and Jacobi, Chang and Wang, Chang et al., and Kim and Bullard) were not significant except the errors associated with f-factor introduced by Kim and Bullard.

“However, Figure 5 shows that the correlation error differences among studies (Park and Jacobi [41], Chang and Wang [59], Chang et al. [58], and Kim and Bullard [61]) were not significant except the errors associated with f -factor introduced by Kim and Bullard [61].”

Park and Jacobi conducted a wider range of geometries (126 cores) to obtain f- and j-factor correlations.

“Wider range of geometries (126 cores) to obtain f - and j -factor correlations were conducted by Park and Jacobi [41].”

The j- and f-factor correlations [41] are in good agreement with the experimental data (Figure 6).

“In good agreement with the experimental data, refer to Figure 6.”

Some researchers introduced generalized correlations such as those obtained by [41, 58, 59, 62] for representing all types of louver-fin arrangements.

“Some researchers introduced generalized correlations such as those obtained by [41, 58, 59, 62] for representing all types of louver-fin arrangements.”

Some researchers included more than 50 different geometries in pursuit of introducing accurate correlations, e.g. 126 louver-fin geometries by Park and Jacobi [41], 55 offset strip-fin geometries by Yang and Li [89], and 74 fin-and-tube geometries by Wang et al. [103].

“Furthermore, some researchers included more than 50 different geometries in pursuit of introducing accurate correlations (e.g. 126 louver-fin geometries by Park and Jacobi [41], 55 offset strip-fin geometries by Yang and Li [89], and 74 of fin-and-tube geometries by Wang et al. [103]).”