A photovoltaic-driven fuel cell multi-energy coupling cycle system and a control method thereof

The photovoltaic-driven fuel cell multi-energy coupling cycle system solves the problem of insufficient coupling between photovoltaic hydrogen production and fuel cells, realizes closed-loop circulation of hydrogen energy and water resources and waste heat recovery, and improves the system's energy efficiency and diversified energy utilization capabilities.

CN122280677APending Publication Date: 2026-06-26CHINA HUADIAN ENG CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA HUADIAN ENG CO LTD
Filing Date
2026-02-13
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

The insufficient coupling between photovoltaic hydrogen production and fuel cells in existing technologies leads to low hydrogen energy utilization. The inadequate coupling between photovoltaic hydrogen production and fuel cells in existing technologies fails to achieve a closed-loop cycle of matter and energy, resulting in energy waste and low overall energy efficiency.

Method used

A photovoltaic-driven fuel cell multi-energy coupled cycle system was designed, including a hydrogen source cycle subsystem, a first organic Rankine cycle subsystem, a water resource cycle subsystem, and a second organic Rankine cycle subsystem. Through the closely connected subsystems, hydrogen production, purification, power generation, and the recovery and repurification of unreacted hydrogen are realized, forming a closed hydrogen source micro-cycle. Waste heat and condensate are recovered, realizing a closed water resource cycle and improving the overall energy efficiency of the system.

Benefits of technology

By using a multi-energy coupled cycle system, hydrogen energy utilization is improved, waste heat is fully recovered, water resources are closed-looped, diversified energy needs are met, the overall energy efficiency of the system is improved, and resource consumption is reduced.

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Abstract

This application provides a photovoltaic-driven fuel cell multi-energy coupled cycle system and its control method, relating to the field of new energy power generation and comprehensive utilization technology. The system includes: a hydrogen source cycle subsystem, a first organic Rankine cycle subsystem, a water resource cycle subsystem, and a second organic Rankine cycle subsystem. The system achieves a closed-loop micro-cycle of hydrogen production, purification, power generation, and recycling followed by purification through the hydrogen source cycle subsystem; the first organic Rankine cycle subsystem recovers waste heat from cathode exhaust gas to generate electricity and provides condensate; the water resource cycle subsystem recovers and purifies the condensate, and uses purge gas combustion to generate steam; the second organic Rankine cycle subsystem recovers waste heat from the steam to generate electricity and is coupled with the first organic Rankine cycle subsystem. This achieves the technical effects of improving hydrogen energy utilization, fully recovering waste heat, realizing a closed-loop water resource cycle, meeting diversified energy needs, and improving the overall energy efficiency of the system.
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