Abstract—A novel combinative structure, consisting of lateral hydrophobic pontoon oAN and central hydrophilic evaporator iAN, was designed for high-performance solar steam device. Both oAM and the iAN were derived from areca nut (AN), through different thermal and surface chemical treatments. With inferior water absorption and evaporation efficiency, the pontoon oAN nevertheless provides footage for the entire device, in contrast, although being efficient in water adsorption and evaporation, iAN requires the supporting oAN to keep its buoyancy. We therefore combined advantages of oAN and iAn to assemble a solar steam device with long-term stability and high solar thermal efficiency of ∼82% under 1-sun illumination. The idea using combinative structure as efficient solar steam device can be further extended to other potential systems, therefore, this study provided foundation for future development of novel solar steam devices. importance.
Keywords—Solar steam generation, areca nut, pontoon, supporter, combinative structure.
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