Abstract
The heavy water separation efficiency enhancement in double‐flow, by inserting an impermeable sheet or a permeable barrier into double‐flow thermal‐diffusion columns with external refluxes at the ends has been investigated analytically. The analysis is conducted when using an orthogonal expansion technique. The separation efficiencies are compared with conventional Clusius–Dickel columns of the same size. Considerable improvements in heavy water enrichment in double‐flow thermal‐diffusion columns can be obtained by increasing the inclined angle and/or by decreasing the aspect ratio. Analytical results also show that both the recycle ratio and the position of insertion are important design parameters.
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