WAMAE, W., SURIWONG, T., & THRERUJIRAPAPONG, T. (2018). Thermal Efficiency of a New Prototype of Evacuated Tube Collector using Sn-Al2O3 as a Selective Solar Absorber. Walailak Journal of Science and Technology (WJST), 15(11), 793–802. https://doi.org/10.48048/wjst.2018.5965