As the hydrogen economy gains momentum, liquid hydrogen (LH₂) is emerging as a critical enabler for hydrogen storage in heavy-duty, maritime and aerospace applications. This talk presents our recent advancements in validated simulation models for LH₂ filling processes, offering insights into thermal and fluid dynamic behaviour as well as losses during refuelling operations. The presentation will also highlight simulation-based investigations into key safety phenomena, including potential hazards related to cryogenic leakage and venting. These findings support the development of safer, more efficient LH₂ systems. Additionally, the talk will provide an overview of the design and implementation of a state-of-the-art liquid hydrogen laboratory infrastructure, which will serve as a platform for experimental validation, technology development, and collaborative research. Together, these efforts contribute to a deeper understanding of LH₂ technologies and help pave the way for their broader deployment in the energy transition.