Eco-friendly and low-cost nanofluid for direct absorption solar collectors

• DOI: 10.1016/j.matlet.2022.133323
• Publication Date: 2022-10-17T15:08:08Z
• Authors: Boris V. Balakin; Pavel G. Struchalin
• Keywords: Molar absorptivity; Environmentally Friendly

Nanofluids are promising receivers for solar collectors with volumetric absorption. These 1.2…1.4 times more efficient than conventional technology. However, most of the considered nanofluids expensive and toxic. This work demonstrates how to treat instant coffee produce inexpensive environmentally friendly collectors. Our nanofluid contains particles an average size below 100 nm. The extinction coefficient is up 300 1/m when 2% wt. used. toxicity same order as coolants.