浅析U形管高加过热段出口汽温迭取与传热面积优化.pdfVIP

学兔兔 第2期 锅 炉 制 造 No．2 2012年3月 BOILER MANUFACTURING Mat．2012 文章编号：CN23—1249(2012)02—0038—03 日 浅析U形管高加过热段出口汽皿 迭取与传热面积优化 国金莲 (哈尔滨锅炉厂有限责任公司，黑龙江哈尔滨150046) 摘 要：U形管高压加热器在国内外火电机组中已得到广泛应用，高加的传热面积优化具有重要技术经济意 义。本文仅就顺流传热面布置下过热段出口汽温(即过热段与凝结段分界点蒸汽温度)对于计算传热面积的 影响做一初浅分析。 关键词：u形管高压加热器(高加)；高加传热面积优化；高加过热段；凝结段；分界点 中图分类号：TM621 文献标识码：A Primary Analysis to Optimized Design of the Heat Transfer Surface and Iteration of the DSZ Outlet Steam Temperature 0f U —Tube High Pressure Heaters Guo Jinlian (Harbin boiler Co．Ltd．，Harbin 150046 China) Abstract：The U—Tube High Pressure Heaters have already been widely used at home and abroad heat——engine plant and the optimized design of the HP heat transfer surface gets important signifi—- cance on technology economy．This article just gives out primary analysis about the influence of DSZ outlet steam temperature(which at the cut—off point between DSZ and DCZ)on the calculating of the heat transfer surface when it adopts downstream heat transfer surface layout．If there is anything wrong please point out． 、 Key words：U—Tube High Pressure Heaters(HP)；optimized design of the HP heat transfer sur— face：DSZ；DCZ；cut—off point 面积结果偏大。作者在300MW机组高加方案优 0 引 言 化设计中对“分界点”温度的取值问题进行了较 哈锅传统的高加传热计算方法系按《机械工