Optimization and Scheduling of Comprehensive Energy Systems Considering AmmoniaRefrigeration and Ammonia Blending in Thermal Power Plants
[Objective] In the context of dual carbon，this study aims to construct a joint model of ammonia refrigeration and thermal power units to optimize operating equipment，reduce system costs and carbon emissions，and achieve comprehensive utilization of ammonia throughout the entire process of synthetic a...
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Power Construction
2025-08-01
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| Series: | Dianli jianshe |
| Subjects: | |
| Online Access: | https://www.cepc.com.cn/fileup/1000-7229/PDF/1753435796821-1891469971.pdf |
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| Summary: | [Objective] In the context of dual carbon，this study aims to construct a joint model of ammonia refrigeration and thermal power units to optimize operating equipment，reduce system costs and carbon emissions，and achieve comprehensive utilization of ammonia throughout the entire process of synthetic ammonia reaction. [Methods] First，the reactants for electric to ammonia conversion were obtained through the electrolysis of water and pressure swing adsorption of air. The entire electric to ammonia conversion system was powered by renewable energy wind power，exploring ways to achieve economic and low-carbon operation in high volatility wind power scenarios. Second，the endothermic process of converting liquid ammonia into pure ammonia was linked to ammonia refrigeration，utilizing the cooling energy in a cascade manner. The reactant pure ammonia was then transported to the thermal power unit to form an ammonia blending thermal power unit，exploring the benefits of ammonia blending in thermal power units. Subsequently，the scheduling strategies of the system under different wind power penetration rates were compared and analyzed，and a market policy based on stepped carbon trading and a low-carbon economic scheduling strategy combined with carbon capture and storage market technology was proposed. A stepped carbon trading model was established to reasonably constrain the carbon emissions of the system. Finally，an optimization strategy was proposed with the objective function of minimizing the sum of gas purchase，carbon trading，wind power curtailment，coal consumption，start stop，and electricity to ammonia operation costs. [Results] By setting multiple scenarios for comparison，the results showed that the proposed strategy could reasonably allocate the output of each unit，absorb the waste air volume，and improve the economic efficiency of the integrated energy system operation. [Conclusions] The electric to ammonia conversion system considers both economic and environmental benefits when considering ammonia refrigeration，whereas the combination of ammonia gas as a refrigerant and fuel with thermal power units can help traditional thermal power plants overcome the carbon locking dilemma. |
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| ISSN: | 1000-7229 |