共查询到20条相似文献,搜索用时 62 毫秒
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介绍一种新的热力过程分析方法——(火用)分析法,并对(火用)的数学表达式进行推导.同时以江油发电厂330MW机组的~#7高压加热器和~#4低压加热器为例分析它们的(火用)损失.(火用)分析法不仅考察热力过程能的“量”的变化,而且注重能的“质”,用(火用)来衡量系统的热力学完善程度可准确反映热功转换薄弱环节. 相似文献
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首次提出等效(火用)日降法的概念,并利用这一概念结q-y-ι阵建立了热力系统主系统(火用)甩状态方程.该方法为热力系统的(火用)分析提供了一种全新的思路,可直接计算热力系统热功转换(火用)效率,具有与常规(火用)分析方法相比概念清晰,易于理解,适合计算机程序化等特点,为实际系统定量(火用)分析奠定了一定的基础.以某N300-16.7,537/537-6再热机组为例,验证了(火用)状态方程与常规(火用)平衡法计算结果是一致的. 相似文献
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利用和能更科学地揭示能量的本质涵义,更具体地描述能量转换规律;分析法比能量平衡法更准确地反映了能量的利用情况,更明确地指出了合理用能的方向和条件;“节”与“节能”相比,提法更严谨,含义更深刻,应用起来更科学,更具有可操作性。 相似文献
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描述了分析的基本方法、步骤及意义,结合实例,利用平衡分析与传统能平衡分析方法进行计算,结果表明,能平衡分析法只是单纯从能的量的方面进行评价,未能体现对能的量与质的全面利用;平衡分析法可以准确指出最大损部位或环节,为全面辨识系统的用能薄弱环节提供了依据。 相似文献
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在电厂热能动力设备设计制造,火电厂设计安装、安全经济运行、热力系统优化和节能技术改造等方面,热力系统的经济性计算分析都发挥着极为重要的作用。分析法以平衡原理为基础,为评价能量的"量"和"质"提供了一个统一的尺度。根据平衡原理,对单个控制体建立平衡模型,并针对一般的热力系统,推导损分布矩阵方程。文中以N1000-25/600/600机组热力系统为例,推导损分布矩阵,并在Matlab软件中建立损分布模型,分别对机组在TRL、T-MCR、THA、70%THA、50%THA及40%THA工况下,计算损分布及效率,比较不同工况下各个控制体损和效率的变化。 相似文献
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Ramazan BayindirErdal Irmak ?lhami Colak Askin Bektas 《International Journal of Electrical Power & Energy Systems》2011,33(1):137-146
This study introduces development of a user-friendly and quite effectual energy monitoring system which has been installed in Electrical Education Department of Gazi University in Turkey and in use since November 2007. The system developed monitors data in real time using a powerful energy analyzer which is capable of measuring many parameters of energy consumed in the building. The real time data measured by the power analyzer are transferred to a host computer via RS485 serial communication protocol and then collected in a database continuously. Thus, parameters of energy measured are successfully followed, archived, and presented as graphical forms.The monitoring system presented in the study integrates to quite visual and quite user friendly interface with powerful and flexible hardware. Therefore, several functions can be performed easily and safely by simple actions. On the other hand, the system presented in our paper is developed in a university, so it can be used by students to learn energy systems and parameters. 相似文献
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通过对余热锅炉的火用分析,推导出余热锅炉参数与火用回收量的关系模型,并分别给出对应不同烟气入口温度,饱和蒸汽锅炉和过热蒸汽锅炉回收火用值和工作参数的选择图表,分析提高余热锅炉火用效率的途径和方法.推荐不同烟气温度条件下余热锅炉的优选参数. 相似文献
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This paper applies novel models to forecast the developing trends of China’s energy production and consumption under the influence of China’s energy saving policy. An optimized single variable discrete grey forecasting model is adopted to forecast the total amount of energy production and consumption while a novel Markov approach based on quadratic programming model is proposed to forecast the trends of energy production and consumption structures. The proposed models are used to simulate China’s energy production and consumption during 2006–2011 and forecast its trends in 2015 and 2020. Results demonstrate that proposed models can effectively simulate and forecast the total amounts and structures of energy production and consumption. And by comparing with regression model, results show proposed model is a little better than regression in simulating and forecasting the case. Although the growth rate of energy consumption in China has decreased under the energy saving policy, total amount of energy consumption and the proportions of natural gas and other energies keep growing while the self-sufficiency rate of crude oil and natural gas continues to drop. 相似文献
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基于热经济学结构理论的热力系统性能评价 总被引:13,自引:4,他引:13
传统热力学分析技术由于仅考虑系统的热力学评价而忽视了生产中的成本因素,因而无法更为全面的评价系统和设备的生产性能。该文以热经济学结构理论为基础,以湖南某电厂300MW燃煤机组为对象,使用基于燃料一产品定义的热经济学模型和[火用]成本模型量化了设备之间的生产交互过程,利用系统仿真深入分析了系统在设计工况以及变工况下,成本形成的热力学过程及其分布规律,并且定量研究了各种运行参数对设备[火用]成本的影响。结果表明热经济学结构理论弥补了传统热力学分析的不足,对电厂以及其他复杂能量转换系统的运行经济性分析和优化,提供了一套行之有效的方法。 相似文献