燃气—蒸汽—有机工质联合循环发电研究
发布时间：2018-08-12 08:45
【摘要】：燃气-蒸汽联合循环（简称CCPP）发电效率较高，而有机朗肯循环（简称ORC）可有效利用低品位热能。而进行两个循环耦合集成系统的研究，可进一步提升机组的发电功率和效率。 以北京太阳宫燃气热电有限公司（简称太阳宫电厂）350MWCCPP机组为例，基于梯级利用的方法，，提出了燃气-蒸汽-有机工质联合循环（简称GSOPP）工艺方案。首先，在CCPP热平衡和火用平衡模型的基础上，对太阳宫CCPP机组进行了性能计算和火用损失分析；其次，筛选了6种有机工质，并研究了有机工质蒸发温度、冷凝温度、蒸发压力和冷凝压力对ORC性能的影响规律。最后，以太阳宫电厂CCPP机组的设计和运行工况参数为基础，对GSOPP的抽汽和排烟两种方案与太阳宫电厂原方案进行热经济性对比分析，优化了热源参数。计算表明，依据正能量系数优选了R141b工质，在设计工况条件下抽汽和排烟两种方案的发电功率比原工艺分别提高了14.76MW和6.37MW，发电效率分别提高了1.48%和0.47%。 研究表明，抽汽方案GSOPP机组有效地提升了CCPP机组的发电功率和发电效率，其研究结果可为发电机组提高效率和负荷提供思路和方案。
[Abstract]:Gas-steam combined cycle (CCPP) has high power generation efficiency, while organic Rankine cycle (ORC) can effectively utilize low grade heat energy. The power and efficiency of generating units can be further improved by the study of two cycle coupled integrated systems. Taking the 350MWCCPP unit of Beijing Yanggong Gas Thermal Power Plant as an example, based on the method of cascade utilization, the process scheme of gas-steam organic working fluid combined cycle (GSOPP) is put forward. Firstly, based on the models of CCPP heat balance and exergy equilibrium, the performance calculation and exergy loss analysis of the solar cell CCPP unit are carried out. Secondly, six kinds of organic working fluids are screened, and the evaporation temperature and condensation temperature of the organic working fluid are studied. The effect of evaporation pressure and condensation pressure on the performance of ORC. Finally, on the basis of the design and operating condition parameters of the CCPP unit in Yanggong Power Plant, the heat source parameters are optimized by comparing the two schemes of GSOPP steam extraction and smoke exhaust with the original scheme of the Sun Gong Power Plant. The calculation results show that according to the positive energy coefficient, the R141b working medium is selected, and the generating power of the two schemes under the design conditions is increased by 14.76MW and 6.37MW, respectively, and the generation efficiency is increased by 1.48% and 0.47%, respectively. The results show that the extraction scheme GSOPP unit can effectively improve the generating power and efficiency of the CCPP unit, and the research results can provide ideas and schemes for improving the efficiency and load of the generating unit.
【学位授予单位】：河北联合大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM611.31
本文编号：2178541
[Abstract]:Gas-steam combined cycle (CCPP) has high power generation efficiency, while organic Rankine cycle (ORC) can effectively utilize low grade heat energy. The power and efficiency of generating units can be further improved by the study of two cycle coupled integrated systems. Taking the 350MWCCPP unit of Beijing Yanggong Gas Thermal Power Plant as an example, based on the method of cascade utilization, the process scheme of gas-steam organic working fluid combined cycle (GSOPP) is put forward. Firstly, based on the models of CCPP heat balance and exergy equilibrium, the performance calculation and exergy loss analysis of the solar cell CCPP unit are carried out. Secondly, six kinds of organic working fluids are screened, and the evaporation temperature and condensation temperature of the organic working fluid are studied. The effect of evaporation pressure and condensation pressure on the performance of ORC. Finally, on the basis of the design and operating condition parameters of the CCPP unit in Yanggong Power Plant, the heat source parameters are optimized by comparing the two schemes of GSOPP steam extraction and smoke exhaust with the original scheme of the Sun Gong Power Plant. The calculation results show that according to the positive energy coefficient, the R141b working medium is selected, and the generating power of the two schemes under the design conditions is increased by 14.76MW and 6.37MW, respectively, and the generation efficiency is increased by 1.48% and 0.47%, respectively. The results show that the extraction scheme GSOPP unit can effectively improve the generating power and efficiency of the CCPP unit, and the research results can provide ideas and schemes for improving the efficiency and load of the generating unit.
【学位授予单位】：河北联合大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM611.31
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