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Numerical Investigation on Heat Transfer Characteristics of Microencapsulated Phase Change Material Slurry in a Rectangular Minichannel
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作者 WANG Zhibin LI Zilong +2 位作者 JIA Lisi DING Bin CHEN Ying 《Journal of Thermal Science》 SCIE EI CAS CSCD 2024年第2期564-577,共14页
Microencapsulation phase change material slurry(MEPCMS) becomes a potential working fluid for cooling high energy density miniaturized components,thanks to the latent heat absorption of particles in the heat transfer ... Microencapsulation phase change material slurry(MEPCMS) becomes a potential working fluid for cooling high energy density miniaturized components,thanks to the latent heat absorption of particles in the heat transfer process.In this work,the Discrete Phase Model(DPM) based on the Euler-Lagrangian method is used to numerically investigate the convective heat transfer characteristics of MEPCMS flowing through a rectangular minichannel with constant heat flux.The results show that particles of MEPCMS are mainly subjected to drag force during the flow.Even so,they can migrate from the high-temperature region to the low-temperature region driven by the thermophoretic force,affecting the particle distribution and phase change process.Moreover,the Nux of the MEPCMS fluctuates due to particle phase change with varying specific heat capacities.Specifically,the value increases first,then decreases,and eventually increases again until it approaches the fully developed value of the pure base fluid as the particles gradually melt.Furthermore,the heat transfer performance of the MEPCMS is influenced by the combination of fluid inlet temperature fluid inlet velocity(v),and mass concentration(c_(m)) of MEPCM particles.The result shows that the maximum reduction of the maximum bottom wall temperature difference(ΔT_(w)) is 23.98% at T_(in)=293.15 K,v=0.15 m·s^(-1),c_(m)=10%. 展开更多
关键词 Microencapsulated Phase Change Material slurry(mpcms) Discrete Phase Model(DPM) particle-fluid interaction force minichannel heat sink THERMOPHORESIS
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相变微胶囊除湿悬浮液再生性能模拟研究
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作者 董红林 牛晓峰 +2 位作者 王丹丹 段地长 陆志恒 《工程热物理学报》 EI CAS CSCD 北大核心 2022年第6期1485-1492,共8页
本文以相变微胶囊悬浮液(MPCMS)为研究对象,基于效能-传质单元数法(ε-NTU)建立了逆流填料塔式绝热型再生器模型,模拟研究了不同微胶囊浓度条件下悬浮液和再生空气入口参数对再生过程的影响。结果表明再生空气出口含湿量随着MPCMS流量、... 本文以相变微胶囊悬浮液(MPCMS)为研究对象,基于效能-传质单元数法(ε-NTU)建立了逆流填料塔式绝热型再生器模型,模拟研究了不同微胶囊浓度条件下悬浮液和再生空气入口参数对再生过程的影响。结果表明再生空气出口含湿量随着MPCMS流量、MPCMS温度和空气温度的增加而增加,随空气流量的增加而降低;溶液出口浓度随着MPCMS流量和空气温度的增加而减小,随MPCMS温度和空气流量的增加而增大;再生空气出口含湿量和溶液出口浓度均随着微胶囊质量分数增加而减小,并显著低于基液,其中,当微胶囊质量浓度为2%时,再生量最大降幅达到53.3%,溶液出口浓度最大降低0.222%,表明在除湿溶液中添加相变微胶囊对于再生过程具有一定抑制作用。 展开更多
关键词 溶液除湿 再生性能 相变微胶囊悬浮液
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