Mobile energy storage characteristics analysis and design proposal

What are the development directions for mobile energy storage technologies?

Development directions in mobile energy storage technologies are envisioned. Carbon neutrality calls for renewable energies, and the efficient use of renewable energies requires energy storage mediums that enable the storage of excess energy and reuse after spatiotemporal reallocation.

How can energy storage systems meet the demands of large-scale energy storage?

To meet the demands for large-scale, long-duration, high-efficiency, and rapid-response energy storage systems, this study integrates physical and chemical energy storage technologies to develop a coupled energy storage system incorporating PEMEC, SOFC and CB.

Why is battery storage a problem in grid-scale applications?

Battery storage, however, faces limitations in grid-scale applications due to its high costs, limited duration, safety risks, shortage in mineral resources (e.g., lithium, cobalt) and energy loss resulting from self-discharge .

How to calculate RTE and exergy efficiency of hydrogen energy storage system?

The round-trip energy efficiency (RTE) and exergy efficiency of the hydrogen energy storage system are defined as follows: (21) χ h = η ex,h = W f + W e,H2 W e + W c,H2 where We,H2 is the power generated by the H2 expander of the SOFC subsystem, kW; Wc,H2 is the power input of the H2 compressor of the PEMEC subsystem, kW.

What are the different types of energy storage technologies?

Existing energy storage technologies can be categorized into physical and chemical energy storage . Physical energy storage accumulates energy through physical processes without chemical reactions, featuring advantages of large scale, low cost, high efficiency and long duration, but lacks flexibility .

What is energy and exergy analysis?

Energy and exergy analysis results indicate that the performance improvement of the proposed system is primarily due to the optimized arrangement of heat exchange processes and the efficient utilization of SOFC exhaust heat. The Exergy Utilization Diagram (EUD) is used to investigate the internal mechanisms for enhancing system performance.