Study on plasma enhanced CVD coated material to promote dropwise condensation of steam

Experimental study of dropwise condensation on plasma-ion implanted stainless steel tubes

“…For large subcoolings, the heat transfer coefficients for DWC approach the values for FWC. These results are in agreement with the investigations made for hard coated surfaces [14,15], but disagree with those obtained previously for ionimplanted surfaces using ion-beams for the implantation [16]. Increasing the ion dose increases the heat transfer coefficient.…”

“…The condensate is cooled by the condensate cooler (13) and its mass flow is measured manually by weighing the condensate collected within a certain time. Then, the condensate is recycled to the storage tank (7) by the condensate pump (15). The condensate formed on the condenser walls is taken out separately from the bottom of the condenser so that it does not affect the measurement of the condensate mass flow resulting at the condenser tube.…”

Condensation heat transfer enhancement in the presence of non-condensable gas using the interfacial effect of dropwise condensation

“…Many methods can be applied to promote DWC mode [26][27][28][29][30][31], such as applying organic promoter, plating novel metal or metal compounds, coating low surface energy polymeric film, ion implanting et al Unfortunately, these methods have not been effectively applied in industrial condensers so far because the specific low energy surface materials for sustaining long-term DWC have not yet been successfully manufactured. As an alternative, polymer coating seems to be a very promising method in industrial applications [26,27].…”

Is dropwise condensation feasible? A review on surface modifications for continuous dropwise condensation and a profitability analysis

“…Enhancements of up to 11 times in the heat transfer coefficient of the measured film condensation could be obtained on a vertical wall. No instabilities of the promoter could be determined within the 500 h operational time [106] . Recent works of Paxson et al and Preston et al claim the development of durable coatings for continuous dropwise condensation.…”