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超临界锅炉全负荷变压运行的中间点温度设计 被引量:2
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作者 樊晋元 陈鸿伟 《锅炉技术》 北大核心 2016年第1期18-21,29,共5页
超临界机组全负荷变压运行使锅炉水冷壁在额定负荷与低负荷区的吸热分配差距扩大,过热器超温加剧。针对此问题,计算分析了660 MW超临界锅炉在机组全负荷变压运行的汽水参数变化和汽水系统热量分配关系。提出了在低负荷汽水相变区应适度... 超临界机组全负荷变压运行使锅炉水冷壁在额定负荷与低负荷区的吸热分配差距扩大,过热器超温加剧。针对此问题,计算分析了660 MW超临界锅炉在机组全负荷变压运行的汽水参数变化和汽水系统热量分配关系。提出了在低负荷汽水相变区应适度降低中间点温度,并降低屏式过热器进口汽温,以解决低负荷变压运行中频繁出现的超温问题的方法;提出了缓减水冷壁在不同运行压力区吸热需求矛盾的方法是在低负荷区减少水冷壁的吸热量,增加过热器系统的吸热量,保持比较平稳的中间点汽水焓。可供开发700℃级超超临界机组及锅炉技术参考。 展开更多
关键词 超临界机组 全负荷变压运行 中间点参数 系统热平衡 热量分配
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Heat balance of solar-soil source heat pump compound system 被引量:2
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作者 陈金华 包修碧 +1 位作者 彭运林 贾宇 《Journal of Central South University》 SCIE EI CAS 2012年第3期809-815,共7页
Based on the state-of-the-art studies of solar-soil source heat pump compound system, operation patterns of solar-soil compound system were analyzed, particularly the advantages of parallel operation pattern. It is fo... Based on the state-of-the-art studies of solar-soil source heat pump compound system, operation patterns of solar-soil compound system were analyzed, particularly the advantages of parallel operation pattern. It is found that parallel operation pattern is better for solar-soil compound system. Furthermore, the heat balance issue of solar-soil compound system was emphatically analyzed from four aspects, which were annual analysis of heating and cooling load, the heat exchange of ground heat exchanger, capacity determination of solar-assisted heat sottrce and heat balance calculation of solar-soil compound system. Moreover, annual rate of heat balance in a solar-soil source heat pump compound system was calculated with a case study. It is shown that the annual heat unbalance ratio is 19%, which is less than 20%. As a result, the practical solar-soil compound system can basically maintain the heat balance of soil. 展开更多
关键词 solar-soil source heat pump compound system heat balance ground-coupled heat pump
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