The combined cycle plants in 2019 are upswing due to definitive closure of conventional coal-fired power plants. The price increase of a ton of CO 2 , will close to 25 euros in 2019, could allow to increase their capacity factor above 50%. It has been already achieved a high flexibility imposed by the regulator of the Spanish network and possible hybridizations, in both gas turbine and heat recovery steam generator. Therefore, one step ahead directed to the reduction and treatment of the flow of exhaust gases at the outlet of the boiler during the operation is necessary. An optimization study based on a parametric analysis of this possible reduction has been carried out, with recirculation of the exhaust gases and the treatment of them with amines in a CO 2 capture plant, both at the exit of the boiler, using real data base, to study their possible integration within the existing combined cycle. The results obtained are very promising: firstly, with the use a 35% of exhaust gases recirculation capture plant in existing combined cycle, the efficiency of the gas turbine improves 0.5%. Secondly, the total number of tons of CO 2 avoid per year would be around 633 kilotons (based on a capacity factor in 2019 closed to 0.41). Therefore, the saved cost in ton of CO 2 for one existing combined cycle could be around 21.4 million of euros/year. This configuration, therefore, decreases the number of trains from 2 (existing combined cycle capture plant) to 1.36. This decreasing is traduced in costs reduction and due to it an effective technique for pollutant emissions reduction. On the other hand, the new combined cycle will have an efficiency penalty caused by chemical absorption in the capture plant. The crossover requires approximately 30% of the middle/low steam of the turbine to obtaining 90% capture of CO 2 with the corresponding penalty of 4 points in the global cycle performance and a reduction of power close to 21% with respect to the existing cycle. All boil down to a conflict of interests between €/Mw lost vs €/ton CO 2 avoided. Clearly the rising in capacity factor and flexibility in current combined cycle plants will be decisive in future to elucidate this conflict. The results obtained are totally in contrast with other studies carried out being fully feasible for implementation in existing combined cycles.
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机译：由于传统的燃煤发电厂的最终闭合，2019年的综合循环厂正在上升。 2019年，大约二氧化碳的价格增加，将近于25欧元，可以将其产能因素提高到50％以上。在燃气涡轮机和热回收蒸汽发生器中，已经实现了西班牙网络和可能杂交的调节器施加的高柔韧性。因此，需要前面的一步是在操作期间锅炉出口处的排气流动的减少和处理。基于对这种可能还原的参数分析的优化研究已经进行，通过使用真实数据库的锅炉出口的CO 2捕获厂中的废气再循环和将它们的胺处理在锅炉的出口中进行了处理。研究他们在现有的组合周期内的可能集成。得到的结果非常有前途：首先，随着使用35％的废气再循环捕获厂在现有的组合循环中，燃气轮机的效率提高了0.5％。其次，每年吨2的吨2吨的总数将是633千吨（基于2019年的容量因素关闭至0.41）。因此，一个现有组合循环的CO 2的保存成本可能为2140万欧元/年。因此，这种配置将来自2（现有组合循环捕获工厂）到1.36的列车的数量降低。降低该减少在减少成本中，并且由于它是污染物排放减少的有效技术。另一方面，新的组合循环将具有捕获植物中的化学吸收引起的效率惩罚。交叉需要大约30％的涡轮机中/低蒸汽，以获得90％的CO 2捕获，在全球循环性能中的4分的相应罚款，相对于现有循环接近21％的功率降低。所有煮沸到欧元损失的利益冲突与€/ ton co 2避免。显然，未来将在未来阐明这种冲突的情况下，能力因素和灵活性的上升将决定。与现有组合循环中的实施完全可行的其他研究，所获得的结果完全相反。
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