مشخصات پژوهش

Portable hydrogen (H2) production and storage face major challenges in achieving low economic cost, high efficiency, and reduced environmental impacts. Therefore, the development of novel production and storage methods is essential to overcome these challenges. This study introduces an integrated system that uses a six-step copper-chlorine (CuCl) thermochemical cycle for H2 production with a dual-path cryogenic refrigeration and liquefaction process. In this system, the required energy is supplied by industrial waste heat and grid-connected wind energy. Additionally, internal waste heat recovery in the CuCl cycle is utilized to improve the exergy of the system and lower the cost of H2. The use of renewable and recovered energy sources reduces dependence on fossil fuels and supports cleaner and more sustainable production by lowering emissions and improving energy efficiency. The main innovation of this study lies in the integrated coupling of H2 production and liquefaction processes. Through the application of pinch analysis in the design of the cryogenic heat exchanger network and the strategic utilization of waste heat and renewable energy sources, thermodynamic irreversibilities and reliance on external energy are minimized. Thermodynamic simulations performed in ASPEN PLUS/HYSYS software and MATLAB programming illustrate that the CuCl-based H2 production subsystem achieves an energy efficiency of 40.15% and an exergy efficiency of 54.25%. The H2 liquefaction system demonstrates a specific energy consumption and a coefficient of performance of 7.04 kWh/kgLH2 and 0.3168, respectively. Pinch analysis confirms effective cryogenic integration, with minimum approach temperature between 1.25 K and 7.04 K across seven multi-stream heat exchangers. Exergy analysis indicates a total system exergy destruction of approximately 1184 kW, of which nearly 62% originates from the H2 production subsystem and 38% from the liquefaction section. In addition, selective recovery of th