回热器是高温气冷堆—氦气轮机直接循环系统的关键部件之一，它的主要作用是利用高压涡轮出口的高温尾气，使高压压气机后的低温氦气被充分加热后再返回堆芯，以提高系统的循环效率。回热器需要在满足换热效率和压力损失的前提下，实现体积和重量的最小化，以符合装置对紧凑性的要求。本文从总体布置方案、材料方案和芯体段计算方案出发，进行回热器的结构设计，并进行强度校核计算。结果表明：所设计的回热器性能、芯体段的应力应变都满足使用要求，可保证运行的安全、稳定。
Recuperator is one of the key components in HTGR-helium gas turbine direct-cycle system. Its main function is take advantage of high temperature off-gas on the outlet of high pressure turbine to heat microthermal helium behind the high pressure compressor, and then go back to reactor core. This could enhance the cycle efficiency of the whole system. For meet the requirements of compactedness, recuperator should minimize its volume and weight without affect the thermal efficiency and pressure loss. General arrangement design, material scheme and calculation scheme of core section have been shown in this paper. In the end, design and strength checking have been done. The results show that: the recuperator which designed in this paper could meet the requirements of performance, stress and relative deformation.
2017,39(7): 116-120 收稿日期：2016-09-28
DOI：10.3404/j.issn.1672-7649.2017.07.024
分类号：TK17
作者简介：李贝贝(1987-),男,硕士,工程师,研究方向为燃气轮机总体结构
参考文献：
[1] IAEA-TECDOC-1238. IAEA Technical Working Group on GasCooled Reactors Summary 1. Overview and Purpose[C]// The Technical Committee Meeting on Gas turbine Power Conversion Systems for Modular HTGR. November2000: 161–173.
[2] ETZEL K, BACCAGLINI G, SCHWARTZ A. GT-MHR power conversion system design status and technical issues. General Atomics Project 7600. Dec 1994.
[3] 陈愚, 李金玲, 王捷, 等. 板翅式回热器在高温气冷堆中的应用特性[J]. 高技术通讯, 2007, 17(1): 59–63.CHEN Yu, LI Jin-ling, WANG Jie, et al. The application characteristics of plate-fin recuperator for HTGR[J]. Chinese High Technology letters. 2007, 17(1): 59–63.
[4] 陈愚, 李金玲, 王捷, 等. 回热器在高温气冷堆氦气透平循环中的应用[J]. 高技术通讯, 2004(7): 84–88.CHEN Yu, LI Jin-ling, WANG Jie, et al. The application of recuperator for HTGR[J]. Chinese High Technology letters. 2004(7): 84–88.
[5] 陈秋炀, 曾敏, 张冬洁, 等. 高温换热器研究开发进展[J]. 化工进展, 2006, 25: 302–309.CHEN Qiu-yang, ZENG Min, ZHANG Dong-jie, et al. Current status and development for high temperature heat exchangers[J]. Chemical Industry and Engineering Progress, 2006, 25: 302–309.
[6] ZHU Y Z, WANG H F, SANG Z F. The effect of environmental medium on fatigue life for u-shaped bellows expansion joints[J]. International Journal of Fatigue. 2006, 28(1): 28–32.
[7] NABIL R, WLODZIMIERZ B. Thermal performance analysis on a two composite material honeycomb heat regenerators used for HiTAC burners[J]. Applied Thermal Engineering. 2005, 25(17–18): 2966–2982.
[8] YASAR I. Finite element model for thermal analysis of ceramic heat exchanger tube under axial, non-uniform convective heat transfer coeffcient[J]. Materials and Design. 2004, 25(6): 479–482.
[9] HALIS C, MEHMET K. Effects of silicon on the wear behavior of cobalt-based alloys at elevated temperature[J]. Waer, 2004, 257(5–6): 606–611.
[10] 胡壮麟, 刘丽荣, 金涛, 等. 镍基单晶高温合金的发展[J]. 航空发动机, 2005, 31(3): 1–7.HU Zhuang-lin, LIU Li-rong, JIN Tao, et al. The development of Ni-base single crystal superalloy[J]. Aeroengine, 2005, 31(3): 1–7.
[11] TZVETKOFFTZ, KOLCHAKOV J. Mechanism of growth, composition and structure of oxide films formed on ferrous alloys in molten salt electrolytes- A review[J]. Materials Chemistry and Physics, 2004, 87(1): 201–211.
