Ecology, Environment and Conservation Paper

Vol 25, July Suppl. Issue, 2019; Page No.(S129-S134)

ENHANCED SOLAR STILL EVAPORATION RATE USING OPTICAL MODIFICATION

Wahid Dianbudiyanto, Eko Prasetyo Kuncoro and BambangIrawan

Abstract

The water shortage has emerged the world since the past decade, it is worsened by the climate change which could affect the hydrological cycle. This condition need to be resolved by finding new sustainable water resource. Sea is dominating 97% of world water resource, yet it has not been explored maximally due to practical and economic issue. Seawater desalination need high cost and requires high technology support.Thus the share seawater treatment as freshwater supply still minor in developing and under developing countries. Sadly, most of water shortage happens in developing and under developing country. Solar Still desalination denotes cheap and very practical technology to explore the seawater, as it powered by solar flux (W/m2). But the Solar Still technology has very low efficiency, and need to be optimized. Fresnel lens is utilized to optimize the evaporation rate of the Solar Still system. It could enhance the heating rate by shortening the maximum solar flux absorbance to water. The experiments show that Fresnel lens Solar Still system could reach 83.7 mL of distilled water while the commercial glass reach 70 mL. The numerical modeling method and experimental result is statistical identic by lower than 5% standard deviation value.The experiment also show that evaporation efficiency of Fresnel lens Solar Still system is higher compared with Commercial glass system. The Fresnel lens usage is significant (p < 5%) to enhance the evaporation rate.

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