Eckert chart

Kister and Gill (316) modified the Eckert chart curves empirically to fit structured packing data. For structured packings, this modified chart (Fig. 8.19c) was shown (316) to give much better predictions than the Eckert chart. For flow parameters between 0.02 and 0.2 far nonaqueous systems or 0.01 and 1 for air-water, and for packing factors between 6 and 30, Fig. 8.19c was shown (316) to work well for all... 

Generalized correlations for Rood point prediction have been based ou the early wort of Sherwood et aL19 Modifications of this wort have been made from time to time, with that of Eckert,20 mentioned eartier in connection with pressure drop estimation, being representative of those now in tise. The flood line is designated as the top curve of Fig. 5-8-12. Thus, as for pressure drop, the Eckert chart enables a quick estimate of the maximum allowable vapor flow through the packed bed in question. 

The last popular version of the GPDC chart that contained a flood-point curve was the Eckert correlation (53,72). This version (Fig. 8.17)... 

This chapter presents an atlas of charts for interpolating flood, pressure drop, and MOC. For random and grid packings (Charts 10.1002 to 10.3517 and 10.8005 to 10.8205), the charts are plots of the Eckert generalized pressure drop correlation (GPDC) curves, with experimental data superimposed on them. These plots permit data interpolation... 

Eckert (6) was first to tabulate HETP data in a format suitable for interpolation. Vital, Grossel, and Olsen (65) recommended such data over predictive methods, subject to availability of data for a system similar to that considered. The author concurs with this recommendation. In this chapter, Eckert s table is updated and largely expanded, and new tables and charts are edded for structured packings. 

Parameters for the chart are shown in Table 5.8-5. This graphical approach to flooding is recommended over the one of Eckert, and it can he used for the structured packings as well as the random packings. 

Vertical Tubes. The flow regime chart for vertical tube flow shown in Fig. 4.51 was prepared by Metais and Eckert [190] for either a uniform-heat-flux or uniform-wall-temperature boundary condition. The two boundaries of the mixed convection are defined in such a way... 

---