Characteristics of microencapsulated PCM slurry as a heat‐transfer fluid
作者： Yasushi Yamagishi , Hiromi Takeuchi , Alexander T. Pyatenko , Naoyuki Kayukawa
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摘要: The hydrodynamic and heat-transfer characteristics of slurry containing microencapsulated phase-change materials (MCPCMs) were investigated experimentally for use as a fluid. Pressure drop local convective coefficients the flows in circular tube with uniform heat flux measured. Slurries consisting octadecane (C{sub 18}H{sub 38}) contained 2--10-{micro}m-dia. microcapsules pure water used. particle volume fractions varied up to 0.3. Results showed that increases caused flow structure change from turbulent laminar, pressure-drop reduction relative single-phase was under same flow-rate conditions. performance also depended on structure. When MCPCMs melted, increased those nonmelting slurry. This phenomenon influenced by MCPCM fraction, degree turbulence, heating rate at wall. experimental data will be useful design thermal-energy transportation systems using
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