海上小型堆除氧汽源调节变化对汽发机组出力的影响
2020-08-13张臣刚
张臣刚



摘 要:为了更好地展现热力分析结果,并更清楚、更通用地论述海上小型堆除氧器汽源调节变化对其汽轮发电机组出力的影响,本文所述的海上堆输入参数和系统配置采用了基于实际堆型的通用假设,该海上堆采用新蒸汽和高压缸排汽混合后用于除氧器加热,不同的混合比例对汽发机组出力有着明显的影响,本文通过热力分析计算,得到了不同混合比情况下的机组出力数值,由计算结果可见,尽可能多地采用高压缸排汽能够大幅度提升机组出力,经济性相当可观,因为小型堆汽轮机的特点决定了其在运行中高压缸排汽受到负荷变化影响更容易波动,建议根据负荷特点,在负荷基本稳定的情况下,优选高压缸排汽作为除氧汽源,在负荷超过一定波动幅度的情况下,才部分或全部切换到新蒸汽。
关键词:海上小型堆 出力 汽轮发电机组 除氧器供汽 热力分析
中图分类号:TE0 文献标识码:A 文章编号:1674-098X(2020)06(a)-0103-03
Abstract: To better demonstrate the thermal analysis result and to address more clearly and more generally the impact of variation of the deaerator steam supply on the Turbine Generator (TG) capacity, it had been assumed for the input parameters and the system configuration for the ocean-floating Small Module Reactor (SMR) in this article. This SMR uses mixture of the live steam and the HP turbine exhaust steam for deaerator heating. The different mixture percentages have notable impact on the TG unit power output. By thermal analysis in this article, each power output has been achieved for the different mixture percentage. Form the analysis result we can see, the power output of the TG unit can be considerably raised if we use more HP exhaust steam for deaerator heating as possible. So this can be considerably more economical. As it had been determined by the character of the SMR turbine, the HP exhaust steam might be more fluctuated corresponding to the load variation. It has been suggested to prioritize using the HP exhaust steam as deaerator steam supply according to the load character. Only in case that the load variation exceeded certain amplitude, we should partially or completely switch to the live steam.
Key Words: Ocean-floating SMR; Power output; Turbine generator unit; Deaerator steam supply; Thermal analysis
相比二代大型核反應堆,国内在研先进小型核反应堆完全可以达到三代要求,其安全性得到了大幅提高,并具备灵活性高,适应性强、用途广等诸多优势[1],在未来具有较为广阔的发展空间[2-3],许多西方及亚洲核电国家甚至把加快先进小型反应堆研发上升到了国家战略。进入21世纪以来,国际原子能机构(IAEA)大力推动小型反应堆技术的研究和开发,鼓励发展和利用安全、可靠、经济上可行与核不扩散的中小型反应堆。而海上小堆技术的应用则是解决远海能源供给的重要途径,更加有助于提升一个国家的海上资源开发能力,小型核反应堆“即插即用”的优势[4]令其更受关注,应用前景十分广阔,海上核电站时代已经来临。……
