Abstract—

The results from studying prospective energy technology complexes for producing liquefied natural gas (LNG) and using it at electric power facilities as backup fuel are outlined. The article also gives a description and the main parameters of the original process-flow diagram of the LNG complex for combined heat and power plants of PAO Mosenergo, which operates solely on the plant’s secondary energy resources: the pipeline gas excess pressure and the heat of the closed-circuit cooling system. The complex includes means for pipeline gas liquefaction, long-term storage of the standard backup fuel stock, and LNG gasification using the heat removed from the steam turbine condensers when the power plant is shifted for using backup fuel. Based on an analysis of the experience gained around the world from developing similar complexes and the design parameters of the natural gas liquefaction process-flow diagram proposed by the authors, a procedure for calculating the economic efficiency indicators of the projects of LNG energy technology complexes is developed. Based on the actual data on the consumption of main and backup fuel at PAO Mosenergo, calculations of the technical and economic parameters of LNG complexes were carried out, the results of which have demonstrated the economic efficiency of fuel oil replacement by liquefied natural gas for the options of its production at power plants solely as a commercial product or construction of energy technology complexes instead of planned fuel oil facilities. It is shown that, in view of a low net cost of self-produced LNG and taking into account the rapidly developing market of gas engine fuel, the sales of LNG produced in excess of the standard stock amounts may become a significant item of additional income for a power company. In addition, the construction of additional low-tonnage production facilities equipped with large-capacity LNG storage systems will make it possible to enhance the fuel supply reliability of prospective fueling networks.

中文翻译：

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Gazprom Energoholding Group 拥有的发电厂使用液化天然气作为备用和应急燃料的前景

摘要-

概述了研究用于生产液化天然气 (LNG) 并将其在电力设施中用作备用燃料的前瞻性能源技术综合体的结果。文章还给出了 PAO Mosenergo 热电联产 LNG 综合装置原始工艺流程图的描述和主要参数，该装置完全依靠工厂的二次能源运行：管道气体超压和热量。闭路冷却系统。该综合设施包括管道气体液化装置、标准备用燃料库存的长期储存以及在发电厂转换为使用备用燃料时使用从蒸汽涡轮冷凝器中去除的热量进行液化天然气气化。结合国内外同类综合体开发经验和作者提出的天然气液化工艺流程图设计参数分析，提出了LNG能源技术综合体项目经济效益指标计算程序。发达。根据PAO Mosenergo主备燃料消耗的实际数据，对LNG联合装置的技术经济参数进行了计算，计算结果证明了液化天然气替代燃料油的经济效益。其在发电厂生产的选择仅作为商业产品或能源技术综合体的建设，而不是计划中的燃料油设施。结果表明，鉴于自产LNG的净成本较低，并考虑到燃气发动机燃料市场的快速发展，超过标准库存量的LNG销售可能成为电力公司重要的额外收入项目。此外，建设配备大容量液化天然气储存系统的额外小吨位生产设施将有可能提高未来加油网络的燃料供应可靠性。