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压缩机表面产生凝露的原因及其解决措施 被引量:4
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作者 涂虬 毛守博 +1 位作者 何建奇 张晓兰 《制冷与空调》 2008年第1期75-79,共5页
变频多联机中距离室内机近的压缩机表面在运行中出现凝露现象,并伴随压缩机内油翻泡,油面下降。从理论方面分析该现象:在名义制冷、最大制冷工况下,制冷剂循环量没有控制好,导致过多的制冷剂进入压缩机后继续蒸发,温度降低到露点温度以... 变频多联机中距离室内机近的压缩机表面在运行中出现凝露现象,并伴随压缩机内油翻泡,油面下降。从理论方面分析该现象:在名义制冷、最大制冷工况下,制冷剂循环量没有控制好,导致过多的制冷剂进入压缩机后继续蒸发,温度降低到露点温度以下,从而出现压缩机表面凝露。为此,提出相应的控制措施,较好地解决了该问题,对保证多联机系统的稳定安全可靠运行具有一定的指导意义。 展开更多
关键词 变频多联机 凝露 露点
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Algorithm Research on the Influence of Traffic Environmental Variation to City Radiation Scope Based on P.D.Converse Breaking Points Model
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作者 Qiusheng Tang Yulong Ren Ping Li 《Journal of Systems Science and Information》 2008年第1期63-70,共8页
By analyzing and comparing the existing methods for the division of urban economic region, this paper supplemented and developed the breaking point theory. In this model, put forward for the first time using "the spa... By analyzing and comparing the existing methods for the division of urban economic region, this paper supplemented and developed the breaking point theory. In this model, put forward for the first time using "the space-time distance" to replace "the space- linear distance" and "the city comprehensiveness quality- fuzzy comprehensive assessment Index" to "the urban population or GDP'. Set up the algorithm of including "the space- time distance" and the city radiation scope changed with the changes of traffic conditions. Thus has realized "dynamically" tracing of the city radiation scope influenced by the traffic conditions. Taking Yichang city as an example, the paper analyzed the city function localization in the times of new traffic environments. Because China's cities are at the times of the traffic great changes, therefore, the method and the main conclusions of this paper have some methodology guiding sense to the majority cities of deffernt country to re-position. 展开更多
关键词 traffic environment city function localization P.D.Converse breaking point model space-time distance city radiation scope
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