| 润滑油对超临界压力CO_2对流换热特性影响 |
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| 引用本文： | 赵陈儒,姜培学,张有为.润滑油对超临界压力CO_2对流换热特性影响[J].工程热物理学报,2010(12). |
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| 作者姓名： | 赵陈儒 姜培学 张有为 |
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| 作者单位： | 热科学与动力工程教育部重点实验室清华大学热能工程系; |
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| 基金项目： | 863计划项目(No.2006AA05Z416); 教育部科学技术重大项目(No.306001) |
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| 摘 要： | 本文对含有少量润滑油对冷却条件下水平细圆管中超临界压力二氧化碳的对流换热特性进行了实验研究,并与相应不含润滑油的工况及已有经验关联式进行对比。实验结果表明,润滑油会使冷却工况下超临界压力二氧化碳的对流换热恶化,尤其是二氧化碳温度在准临界温度附近时,恶化现象更显著。本文提出了用于计算含润滑油时冷却工况下超临界压力二氧化碳对流换热的经验关联式,其计算结果与90%以上实验数据的偏差在25%以内。
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| 关 键 词： | 超临界二氧化碳 冷却 润滑油 对流换热 实验研究 |
INFLUENCE OF LUBRICATING OIL ON HEAT TRANSFER OF SUPERCRITICAL CO_2 DURING COOLING |
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| ZHAO Chen-Ru JIANG Pei-Xue ZHANG You-Wei.INFLUENCE OF LUBRICATING OIL ON HEAT TRANSFER OF SUPERCRITICAL CO_2 DURING COOLING[J].Journal of Engineering Thermophysics,2010(12). |
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| Authors: | ZHAO Chen-Ru JIANG Pei-Xue ZHANG You-Wei |
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| Institution: | ZHAO Chen-Ru JIANG Pei-Xue ZHANG You-Wei (Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Thermal Engineering,Tsinghua University,Beijing 100084,China) |
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| Abstract: | The influence of small amount of POE-type lubricating oil to the in-tube heat transfer of CO_2 at supercritical pressures during cooling was experimentally investigated in the present research. The measured data were compared with those at the oil-free conditions.The experiments showed that adding small amounts of lubricating oil had a significant impact on the in-tube heat transfer of supercritical CO_2 during cooling.The maximum impairment occurred when the bulk temperature of the CO_2 was near the pseudo... |
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| Keywords: | supercritical CO_2 cooling lubricating oil convection heat transfer experiment |
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