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微通道内低沸点工质流动沸腾压降特性 被引量:7

Pressure drop characteristics during flow boiling in micro-channel with low boiling point refrigerant
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摘要 在压力为0.5~1.7 MPa,质量流量为381~2291 kg·m-2.s-1,干度为0~1.0的工况范围内试验研究微尺度通道内低沸点混合工质R32/R134a的流动沸腾压降性能,同时对两相流流型进行可视化观察。微尺度通道内径为1.92 mm,0.86 mm和0.5 mm三种,试验结果表明:微尺度通道内压降随质量流量的增加而增大;在低热通量时,压降随着热通量的增大而增加;当热通量q】150 kW·m-2以后,压降不再随着热通量的增大而升高,而是保持一个基本不变的趋势;当通道内流型由弹状过渡到环状时,会出现压降的波动,弹状流时压降缓慢增加,而环状流时压降保持稳定。 在压力为0.5~1.7 MPa,质量流量为381~2291 kg·m-2.s-1,干度为0~1.0的工况范围内试验研究微尺度通道内低沸点混合工质R32/R134a的流动沸腾压降性能,同时对两相流流型进行可视化观察。微尺度通道内径为1.92 mm,0.86 mm和0.5 mm三种,试验结果表明:微尺度通道内压降随质量流量的增加而增大;在低热通量时,压降随着热通量的增大而增加;当热通量q>150 kW·m-2以后,压降不再随着热通量的增大而升高,而是保持一个基本不变的趋势;当通道内流型由弹状过渡到环状时,会出现压降的波动,弹状流时压降缓慢增加,而环状流时压降保持稳定。
出处 《化工学报》 EI CAS CSCD 北大核心 2011年第S1期118-122,共5页 CIESC Journal
基金 国家自科然科学基金项目(50876068)~~
关键词 微通道 低沸点 流动沸腾 压降 micro-channel low boiling point flow boiling pressure drop
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参考文献12

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