We present measured optical absorptivity, emissivity, and maximum solar-heated temperatures for micropatterned molybdenum. The molybdenum samples were fabricated using laser micromachining and characterized using an integrating sphere and an infrared microscope. In-air solar simulator-heated temperature results for the molybdenum samples with different microstructures are presented, and COMSOL modeling is then used to predict in-vacuum maximum temperatures. A vacuum chamber was developed to reduce the convection heat loss with a mount designed to minimize conduction loss, and a maximum measured temperature of 413°C was obtained.
- heat transfer
Cen, H., Nunez-Sanchez, S., Bickerton, I., Fox, N. A., & Cryan, M. J. (2020). Solar Thermal Characterisation of Micro-Patterned High Temperature Selective Surfaces. Journal of Photonics for Energy, 10(2), . https://doi.org/10.1117/1.JPE.10.024503