用于提高大型能源设施燃料元件效率的系统中的内燃机

V.M. Bgantsev, A. Levterov
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引用次数: 0

摘要

本文分析了在内燃机辅助活塞式燃气发动机的结构中加入燃气轮机和固体氧化物高温燃料电池来提高能源综合体效率的潜在可能性。天然气、甲烷被用作能源载体。本课题的研究对象是副机在变成分混合气体燃料(一氧化碳-甲烷)上工作时的工作过程指标。采用简化的活塞发动机工作周期计算方法,采用计算分析方法进行了研究。考虑了几个问题的解决方案:在燃料电池加热过程中,在出口处理一氧化碳排放;提供用于为甲烷转化装置提供动力的额外电能来源和用于其蒸汽-等离子体转化的额外热源;一氧化碳和不完全甲烷转化残留物的利用。对一台100kw容量的燃气辅机使用变成分混合燃料(一氧化碳-甲烷)的工作过程各项指标进行了计算研究,结果表明,在对供油调节系统进行适当修正后,辅机运行稳定。整个燃油浓度范围内的有效效率系数变化不大(由0.369变为0.380)。随着混合燃料中甲烷比例的增加,可以观察到它的增长。循环的平均有效压力几乎没有变化,在整个混合气成分变化范围内,发动机运行时循环的最大压力在8.0 MPa水平。随着燃料混合物中甲烷浓度的增加(从2117 K到2048 K),最高温度发生了轻微变化。该研究证明了所提出的方法的有效性,该方法通过在其结构中包含一个成本最低的辅助燃气发动机,以适应可变成分混合燃料的运行,从而改善燃料电池能源综合体的环境和经济特性。
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INTERNAL COMBUSTION GAS ENGINES IN SYSTEMS FOR INCREASING THE EFFICIENCY OF FUEL ELEMENTS OF LARGE ENERGY FACILITIES
The proposed article analyzes the potential possibility of increasing the efficiency of an energy complex with a gas turbine and solid oxide high-temperature fuel cells, into the structure of which an auxiliary piston gas engine of internal combustion is integrated. Natural gas, methane was used as an energy carrier. The subject of the research is indicators of the working process of the auxiliary engine when it is working on mixed gas fuel (carbon monoxide - methane) of variable composition. The research was carried out by the computational and analytical method using a simplified method of calculating the working cycle of a piston engine. Solutions to several problems are considered: disposal of carbon monoxide emissions at the exit from fuel cells during their heating; provision of an additional source of electrical energy for powering methane conversion devices and an additional source of heat for its steam-plasma conversion; utilization of carbon monoxide and residues of incomplete methane conversion. Calculation studies of indicators of the working process of an auxiliary gas engine with a capacity of 100 kW on mixed fuel of variable composition (carbon monoxide - methane) show its stable operation with appropriate correction of the fuel supply regulation system. The effective efficiency coefficient in the entire range of fuel concentration slightly changed (from 0.369 to 0.380). Its growth is observed with an increase in the proportion of methane in the mixed fuel. The average effective pressure of the cycle practically does not change, and the maximum pressure of the cycle during engine operation in the entire range of changes in the composition of the mixture is at the level of 8.0 MPa. Slight change in the maximum temperature with an increase in the concentration of methane in the fuel mixture (from 2117 K to 2048 K) has been noticed. The research testified to the effectiveness of the proposed method of improving the environmental and economic characteristics of the energy complex with fuel cells, by including in its structure an auxiliary gas engine with minimal cost adaptation for operation on mixed fuel of variable composition.
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来源期刊
CiteScore
1.00
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发文量
3050
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