黄华,周万伟,季炫宇,袁志超,周雄,欧阳顺,李巳聪,杨鲁

• 1:华瀛天然气股份有限公司
• 2:重庆科技大学资源循环利用与碳中和技术研究院

摘要(Abstract)：

基于广东华瀛液化天然气（LNG）接收站的设计运行条件和周边产业环境，首先设计了一套热机循环发电耦合浅冷冻库的LNG冷能梯级利用方案，并采用专业软件HYSYS建模求解流程中的关键参数，以提升能效和大规模消纳冷能为目标，对原有方案进一步优化改进。结果表明：在全年最低气化日LNG外输量为228 t/h的条件下，原方案采用一级热机循环与冻库结合，年发电量超过3 283×10~4 k W·h，并满足了7 500 m~3冻库的冷负荷需求；而优化设计后的新方案采用“两级热机循环-浅冷冻库”设计，通过提升热源温度，并改用质量分数40%乙烷和60%丙烷的混合工质，使热机循环系统的设计年发电量可提升至6 204×10~4 kW·h，单位质量LNG的净发电量从原先的17.54(kW·h)/t增加到33.02(kW·h)/t，还可节约约5 364.1万元/年电费。尽管多级的热机循环能够减少温差造成的不可逆损失，但考虑投入产出比及运行可靠性等因素，第二方案能与华瀛LNG接收站实际条件紧密结合，具有较好的工程可行性和经济性。上述2种冷能梯级利用设计方案各有优势，适用于接收站的不同发展阶段和LNG冷能利用的不同评价指标，为华瀛LNG接收站全面投产后的冷能利用提供了有益参考。

关键词(KeyWords)： 液化天然气;冷能梯级利用;热机循环;能效优化;经济性评价

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 黄华,周万伟,季炫宇,袁志超,周雄,欧阳顺,李巳聪,杨鲁

DOI: 10.19666/j.rlfd.202502121

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