Drying relationship with power

The powerful analogy that exists among momentum, heat, and mass transport permits useful values of convective mass transfer coefficients to be calculated from known values of convective heat transfer coefficients. For a particular drying system with a specific geometry and flow characteristics, the following relationship is recommended. " ... 

Power Consumption. A previous report (2) showed the power consumption of the pellet mill as a function of throughput. Subsequent work has shown there were errors in these measurements and the result is hereby withdrawn. Later work, using processed office waste with added moisture (75% of the samples contained 10 - 30 wt%, 22% of the samples contained 30 - 50 wt%, and the remainder 10 wt%) showed that the relationship between power consumption P(kW), and feedrate to the densifier F (short tons/h, dry wt basis), could be represented by P = 50.5F + 21.7, for 63 determinations, 0.3 < F < 1.7 Mg/h, with a correlation coefficient r = 0.964 and a standard error of the regression line of 5.7. The intercept should be equal to the idling power of the machine which was separately measured as 24 kW. There was no discernible relationship between power consumption and moisture content. 

Li et al. (2010) investigated the microwave-assisted convective drying of apple slices with time-adjusted power in feedback temperature control. Three desirable temperatures of 75, 65, and 55 °C were chosen, and the corresponding maximum power requirements were set at 400, 300, and 240 W, respectively. The relationships of power versus time and of power versus moisture content (d.b.) can be described by the following equations, respectively ... 

The synchrotron radiation-based X-ray techniques presented here are powerful tools for characterizing the speciation of metals in house dust samples because of the metal specificity, high spatial resolution and ability to examine elements of interest with Uttle to no sample preparation or pre-treatment. Bulk XAFS analysis can be used to infer the chemical speciation of an element of interest in both moist and dry samples while p-XEF and p-XRD can determine the spatial relationship between trace metals and associated mineral particles. 

There is a power relationship between BTS (dry) and BTS (saturated) with a determination coefficient 0.93. The equation of this relation is ... 

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