共查询到20条相似文献,搜索用时 250 毫秒
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机组的热经济性分析是火电厂热力系统性能检测的有效工具,对热力系统进行热经济性分析能够更为准确地了解机组耗能的指标,降低能耗,对火电厂的节能减排工作有着十分重要的意义. 相似文献
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如何降低锅炉热损失,提高锅炉运行经济性,是大型燃煤电站锅炉的一个重要研究课题。本文分析了胜利发电厂200MW机组锅炉热损失增大,且达不到额定出力的原因,介绍了用螺旋肋片管替代光管省煤器及空气预热密封系统改造以降低热损失,提高热效率的经验。运行实践表明改造效果显著,锅炉效率由改造前的88.95%提高为91.33%,机组出力可达220MW。锅炉运行经济性得以提高。 相似文献
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PG650t/h型锅炉由于炉内结渣和排烟温度高使锅炉运行的安全性和热经济性受到严重影响,试验研究表明主要原因是燃烧系统存在缺陷以及设备和烟道漏风,指出提高锅炉热经济性应从完善燃烧系统、合理组织配风和堵漏3方面采取措施。 相似文献
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结合大唐景泰电厂一期工程2×660 MW超临界燃煤空冷机组锅炉燃烧的实际特点,深入分析锅炉排烟温度上升的原因,并提出一定的解决方案,从而实现火电厂整体效益和经济性. 相似文献
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锅炉燃烧制系统空气阻力计算程序是火电厂设计中常有的程序。采用MS-Fortran在Windows环境下编制的程序能够计算锅炉烟风煤粉管道的阻力,用于选择锅炉配套风机,也可用于管道阻力比较,以便优化管理布置,提高电厂运行经济性,使用本程序试算了两个工程的三个管系,与手工计算结果基本一致,误差<1%。 相似文献
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In this paper, an exergy cost analysis method based on the structural theory of thermoeconomics is applied to a gas-fired micro-trigeneration system, which uses a small-scale generator set driven by a gas engine and a new small-scale adsorption chiller (ADC). The thermoeconomic model for the system based on the fuel–product concept is defined to quantify the productive interaction between various components. The distribution of the resources and costs of all flows in the productive structure are calculated by solving a set of equations according to the experimental data. By adopting the exergy cost analysis method, the production performance of components at design and variable conditions of combined cooling and power are evaluated in detail. Moreover, a comparison between the method of conventional exergy analysis and exergy cost analysis is presented. The results not only reflect that the structural theory is a powerful and effective tool for performance evaluation of complex system, but also prove that the micro-trigeneration system is efficient in utilizing the low-grade waste heat. 相似文献
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目前锅炉燃烧控制主要依靠人工手动调整,为解决运行经验差异导致锅炉燃烧性能差异的问题,提出了一种基于动态标杆值的电站锅炉燃烧控制优化方法。在建立燃烧模型的基础上,以归一化经济与环保指标得到综合效益因子作为寻优判据,对历史工况进行数据挖掘,实现全工况下基于动态标杆值的运行参数自主寻优和更新,使锅炉燃烧、污染物排放相互协调。该方法已于某燃煤电站成功实践,结果表明:在应用案例中,寻优推送后综合效益因子提高了4.34%,使得锅炉热效率和NOx排放质量浓度相互协调更优。 相似文献
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Jose Luz Silveira Wendell de Queiroz Lamas Celso Eduardo Tuna Iraides Aparecida de Castro Villela Laura Siso Miro 《Renewable & Sustainable Energy Reviews》2012,16(5):2894-2906
This work aims with an approach for cogeneration plants evaluation based on thermoeconomic functional diagram analysis. The second law of thermodynamics is used to develop a methodology to analyse cogeneration systems, based on exergoeconomics evaluation. The thermoeconomic optimisation method developed is applied to allow a better configuration of the cogeneration plant associated to a university hospital. Also ecological efficiency is evaluated. The method was efficient and contributes for thermoeconomics modelling and analysis and can be applied to any sort of thermal system, especially those with combined heat and power in thermal parity. 相似文献
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目前锅炉燃烧控制主要依靠人工手动调整,为解决运行经验差异导致锅炉燃烧性能差异的问题,提出了一种基于动态标杆值的电站锅炉燃烧控制优化方法。在建立燃烧模型的基础上,以归一化经济与环保指标得到综合效益因子作为寻优判据,对历史工况进行数据挖掘,实现全工况下基于动态标杆值的运行参数自主寻优和更新,使锅炉燃烧、污染物排放相互协调。该方法已于某燃煤电站成功实践,结果表明:在应用案例中,寻优推送后综合效益因子提高了4.34%,使得锅炉热效率和NOx排放质量浓度相互协调更优。 相似文献