Pure steam condensation experiments on flat channel plates have been performed. To provide a range of values of the governing groups NTU and Ad, steam was condensed crosscurrentwise on polyvinylidene fluoride (PVDF) plates and cocurrentwise on brass plates (8.0 × 10−6 ≤ Ad ≤ 8.4 × 10−2, 0 ≤ NTU−1 ≤ 10). The theoretical predictions, based on an analysis of Nusselt-type condensation on nonisothermal plates, agree excellently with the plastic-plate measurements. The brass-plate experiments, however, agree with the theoretical model only in a limited range of NTU and Ad.

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