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Optimal dispatching of integrated energy system with hydrogen-to-ammonia and ammonia-mixed/oxygen-enriched thermal power

Author

Listed:
  • Li, Wenhao
  • Liu, Weiliang
  • Lin, Yongjun
  • Liu, Changliang
  • Wang, Xin
  • Xu, Jiahao

Abstract

An integrated energy system configuration and optimal scheduling method of hydrogen to ammonia and ammonia-mixed/oxygen-enriched combustion for thermal power units is proposed to address the problems of poor economics and high emissions of deep peak regulation of thermal power units, unused oxygen by-products of hydrogen production, and high hydrogen storage and transmission costs. Firstly, a synergistic operation framework of wind and solar power electrolysis water to hydrogen, hydrogen to ammonia and ammonia mixed/oxygen-enriched combustion for thermal power units is constructed, by introducing an ammonia synthesis system, enriching the products of the system and improving the economic efficiency, and synthesise the green ammonia from the green hydrogen produced by wind and solar into green ammonia, which is supplied to thermal units for mixing, so as to reduce the cost of thermal power generation and carbon emission, and use the by-products of electrolytic water and air separation as oxygen-enriched combustion for thermal power units, so as to achieve full utilization of the products of the system; Secondly, the life model of electrochemical energy storage plant based on the equivalent number of full cycles was constructed, the multi-objective optimal scheduling model of the integrated energy system considering economy, consumption rate and environmental protection was established by taking into account the balanced demand of electricity, hydrogen and oxygen as well as the constraints of ammonia synthesis section, the weight coefficients were assigned based on the analytic hierarchy process and entropy weight method, and then the optimal scheduling scheme was solved; Finally, the example is constructed with reference to a demonstration project in Inner Mongolia and a multi-scenario comparative analysis is conducted. The conclusion shows that the proposed optimal dispatch method can achieve diversified application of hydrogen and ammonia energy, improve the renewable energy consumption rate to 100 %, reduce the carbon emission penalty by 6.12 × 105 CNY (11.65 %), and reduce the total system dispatch cost by 1.20 × 106 CNY (10.58 %), and, in addition, the use of the lifetime model of the energy storage plant can reduce the lifetime cost of storage by an average of 37.16 %.

Suggested Citation

  • Li, Wenhao & Liu, Weiliang & Lin, Yongjun & Liu, Changliang & Wang, Xin & Xu, Jiahao, 2025. "Optimal dispatching of integrated energy system with hydrogen-to-ammonia and ammonia-mixed/oxygen-enriched thermal power," Energy, Elsevier, vol. 316(C).
    • Handle: RePEc:eee:energy:v:316:y:2025:i:c:s0360544225001562
    DOI: 10.1016/j.energy.2025.134514
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