2v 2ee

Figure 4 Combination of adsorption and vaporization. Layer thickness, 0.01 cm; velocity constant kv = 0.0235 cm2 s~1; porosity of the dry layer, 0.75.

Curve 1 Adsorption speed v' = 2x 10~5cm s~1, vaporization speed v = 0. The particles are filled at A (st=0.40). The total porosity is 0.30 at C, 0.20 at D and 0.10 at E.

Curve 2 v' = 0, st = 0.4, v = 0, eqn [21] is applied.

Curve 4v' = 6 x 10~6 cm s~1, v = 0. The particles are filled at B (st= 0.40). The porosity is 0.30 at F.

Curve 6 v' = 0, v= 1 x 10~5cm s~1. (Reprinted with permission from Guiochon G and Siouffi A (1978) Journal of Chromatographic Science 16: 598-609.)

When v' = 0 eqn [27] is valid as eT,0/eT,t = 1. When v = 0, eqn [33] is obtained. Integration yields

Figure 4 displays the general case when both adsorption and (or) vaporization can occur.

In every case when the development is kept short there is no marked deviation from the quadratic law. A very curious situation arises when v' = 2v as then exact compensation of adsorption is made by vaporization.

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Solar Panel Basics

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