Development of a 100-Watt-Scale Beta-Type Low Temperature Difference Stirling Engine PrototypeMatthias Lottmann, Zachary de Rouyan, Linda Hasanovich, Steven Middleton, Michael Nicol-Seto, Connor Speer and David NobesE3S Web Conf., 313 (2021) 08004DOI: https://doi.org/10.1051/e3sconf/202131308004