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锅炉与汽轮机等高设计研究 被引量:7
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作者 尧国富 李建锋 李斌 《工程设计学报》 CSCD 北大核心 2012年第2期143-149,共7页
为了降低现代大容量火力发电机组蒸汽管道的投资成本与运行过程中的压力损失,提出了锅炉与汽轮机采用等高布置的设计理念,即在火电机组的设计建设过程中,尽可能保证锅炉的过热器出口、再热器进出口的标高与汽轮机蒸汽出入口的标高相同.... 为了降低现代大容量火力发电机组蒸汽管道的投资成本与运行过程中的压力损失,提出了锅炉与汽轮机采用等高布置的设计理念,即在火电机组的设计建设过程中,尽可能保证锅炉的过热器出口、再热器进出口的标高与汽轮机蒸汽出入口的标高相同.采用该种布置方式,在地形起伏较大的地区,可以依地势的高低把锅炉建在低处,而汽轮机则安装在高处,因此该等高设计理念可以用来指导电厂的选址.如果是在平原地带,则可以采用锅炉下沉的布置方式来缩短蒸汽管道长度,尽管增加了土建开挖的能耗,但是却减少了输煤的能耗,估算表明,锅炉运行5a(年)左右两者的能量即可达到平衡.锅炉下沉的布置方式还带来了其他的一些优点,比如降低电厂噪音等. 展开更多
关键词 锅炉 汽轮机 等高设计 压力损失 蒸汽管道 投资成本 超(超)临界
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对锅炉和汽轮机的等高设计的探讨
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作者 屈波 《科技风》 2012年第23期10-10,共1页
本文对汽轮机和锅炉的更高设计进行探讨,从锅炉下沉设计和锅炉下沉设计特点分析等方面进行分析,为今后工作打下扎实的基础。
关键词 锅炉 汽轮机 等高设计
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核素恒温器散热结构设计与分析
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作者 吕璇 柳飞洪 +2 位作者 汪鹏程 闫赛飞 张龙 《电子机械工程》 2021年第5期35-39,共5页
为解决放射性合成自动化模块散热问题,文中设计了一款新型多尺寸翅片结构的铝合金核素恒温器,利用有限元分析软件ANSYS Workbench对核素恒温器进行了热力学分析。采用控制变量法进行翅片参数设计,采用翅片的非等高设计进行散热性能优化... 为解决放射性合成自动化模块散热问题,文中设计了一款新型多尺寸翅片结构的铝合金核素恒温器,利用有限元分析软件ANSYS Workbench对核素恒温器进行了热力学分析。采用控制变量法进行翅片参数设计,采用翅片的非等高设计进行散热性能优化,在保证恒温时温差小于5℃的前提下得到散热性能最佳时的结构参数。结果表明:当核素恒温器的翅片高度为11.5 mm、翅片间距为2 mm、翅片的厚度为1 mm、翅片长度为42 mm时,恒温器表面的最高温度为78.745℃,比无翅片时低了25.205℃;经过翅片非等高设计,圆筒内壁与翅片距离为3.5 mm,其他参数不变,恒温器表面的最高温度比优化前低了0.294℃,在此结构参数下恒温器的散热性能最佳。 展开更多
关键词 散热性能 结构设计 等高设计
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PREPROCESSING AND POSTPROCESSING SYSTEM FOR FINITE ELEMENT COMPUTATION
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作者 李俊 潘梅园 陈钟鸣 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1998年第2期108-112,共5页
This paper discusses some aspects of finite element computation,such as the automatic generation of finite element ,refinement of mesh,process of node density, distribution of load,optimum design and the drawing o... This paper discusses some aspects of finite element computation,such as the automatic generation of finite element ,refinement of mesh,process of node density, distribution of load,optimum design and the drawing of stress contour, and describes the developing process of software for a planar 8 node element. 展开更多
关键词 finite element method optimum design stress CONTOUR preprocessing and post processing load distribution
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Discussion on the Design of Campus Environments of Art Academies
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作者 Jie XU 《International English Education Research》 2014年第3期115-117,共3页
In this paper, through the investigation and research on some representative art academies, the difference between art academies and general institutions of higher learning in campus environment is explored in depth. ... In this paper, through the investigation and research on some representative art academies, the difference between art academies and general institutions of higher learning in campus environment is explored in depth. Hopefully, the specific characteristics of the design for campus environments of art academies as well as all sorts of factors causing the characteristics can be discovered, including the specific characteristics of campus subjects, the originality of campus buildings, and the novelty of campus sculpture. 展开更多
关键词 Art Academies Campus Environment DESIGN
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On the analysis of the construction of the quality guarantee system of web based College English teaching 被引量:1
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作者 Nan Chunping Guo Xin 《International Journal of Technology Management》 2014年第5期13-15,共3页
With the quick development of the reform of College English teaching, web based College English teaching is used and generalized in every institution of higher education. However, more attention should be paid to the ... With the quick development of the reform of College English teaching, web based College English teaching is used and generalized in every institution of higher education. However, more attention should be paid to the teaching quality to develop this web based College English teaching model. Therefore, the construction of the quality guarantee system is of major significance to promote the effective design of web based College English course system and improve the quality of web based College English teaching. 展开更多
关键词 Web based College English teaching teaching quality quality guarantee system CONSTRUCTION
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High-Gain Approach Based Full-Order Observers for Linear Systems with Unknown Inputs
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作者 韩冬 刘俊 《Transactions of Tianjin University》 EI CAS 2016年第2期164-173,共10页
In this paper, a full-order observer which can be fully decoupled from the unknown inputs as the conventional full-order observer does is designed by using auxiliary outputs, but the requirement of the matching condit... In this paper, a full-order observer which can be fully decoupled from the unknown inputs as the conventional full-order observer does is designed by using auxiliary outputs, but the requirement of the matching condition is removed. The procedure of calculating the parameter matrices of the full-order observer is also presented. Compared with the existing auxiliary outputs based sliding-mode observers, the designed observer has a simpler design procedure, which is systematic and does not involve solving linear matrix inequalities. The simulation results show that the proposed method is effective. 展开更多
关键词 full-order observer high-gain approach observer matching condition unknown input
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The launch of the multivariate English education in institutions of higher learning in our country and the curriculum design
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作者 Tang Mingxia 《International English Education Research》 2014年第12期50-52,共3页
At present, with the further deepening of the integration of the world economy, the international exchanges and cooperation continue to increase, and the training mode of the talents must also be internationalized. Th... At present, with the further deepening of the integration of the world economy, the international exchanges and cooperation continue to increase, and the training mode of the talents must also be internationalized. The students should receive the cultivation of the professional knowledge, and at the same time, they must have a certain ability of the cross-cultural communication and the level of the professional English. In addition, the national medium and long-term educational reform and development plan (2010 - 2020) also proposed the strategic requirements to improve the quality of the higher education and the level of the internationalization, to promote the comprehensive development of the students. Because of this, the national big colleges and universities are carrying out the reform of the university English teaching in different degrees, and have achieved certain results. But today, in terms of the direction of the educational reform of the university English, the academic circles are still unable to reach an agreement. For example, to set the university courses in English, some scholars believe that because the English levels of the high school graduates enhance unceasingly, the courses with the language teaching as the main contents cannot meet the needs of the students, which need to be reduced or even eliminated, and should be replaced by the bilingual teaching with the liberal education as the contents. Also some scholars advocated that the orientation of the university English teaching in the future should be the ESP teaching or the academic English teaching, rather than the traditional English teaching for the humanities. 展开更多
关键词 multivariate English education colleges and universities DEVELOPMENT curriculum design
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