Volume 12: Low Carbon Cities and Urban Energy Systems: Part I

Experimental study on optical property and stability of Ag-glycol nanofluid for spectral splitting photovoltaic/thermal Jianqing Lin1, Xing Ju2, Chao Xu 3*, Wenzhi Li4

Abstract

In this paper, Ag nanoparticles (NPs) were synthesized through reduction method and suspended in glycol. The obtained Ag nanofluid (NF) exhibited high absorptivity in the visible light wavelengths and good transmittance in the spectral response range of silicon PV cell. In addition, the effect of high temperature on spectral characteristics and stability of Ag NFs were measured by gravitational sedimentation experiments and transmission spectroscopy. The results showed that a slight increase in transmittance was observed in visible region when Ag NF was heated to 100 °C. In contrast, the spectral characteristics in the near-infrared band (NIR) presented different tendencies along with the rise of temperature. The experimental results also demonstrated that as-obtained Ag NFs performs stable at high temperatures, thus can be an optimal spectral filter for the spectral splitting PV/T system.

Keywords Ag-glycol NF, optical property, high temperature stability