Preparation and thermal properties of microencapsulated phase change material for enhancing fluid flow heat transfer

2006 ◽  
Vol 36 (1) ◽  
pp. 28-37 ◽  
Author(s):  
Yu Rao ◽  
Guiping Lin ◽  
Yan Luo ◽  
Shuilin Chen ◽  
Liang Wang
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Thermal Properties ◽  
Phase Change ◽  
Phase Change Material ◽  
Microencapsulated Phase Change Material ◽  
Flow Heat ◽  
Change Material

Fluid Flow and Heat Transfer Characteristics of Microencapsulated Phase Change Material Slurry in Turbulent Flow

2014 ◽  
Vol 136 (6) ◽  
Author(s):  
Hessam Taherian ◽  
Jorge L. Alvarado ◽  
Kalpana Tumuluri ◽  
Curt Thies ◽  
Chan-Hyun Park
Keyword(s):  
Heat Transfer ◽  
Heat Capacity ◽  
Fluid Flow ◽  
Turbulent Flow ◽  
Phase Change ◽  
Phase Change Material ◽  
Flow Conditions ◽  
Microencapsulated Phase Change Material ◽  
Change Material ◽  
Turbulent Flow Conditions

Microencapsulated phase change material (MPCM) slurry is consisted of a base fluid in which MPCM is dispersed. Due to apparent high heat capacity associated with phase change process, MPCM slurry can be used as a viable heat transfer fluid (HTF) for turbulent flow conditions. Heat transfer and fluid flow properties of the slurry in turbulent flow (3000 < Re < 6000) were determined experimentally. Dynamic viscosity of the MPCM slurry was measured at different temperatures close to the melting point of the material (20–30 °C). Pressure drop measurements under turbulent flow conditions were recorded for 6 MPCM samples at various concentrations. The pressure drop of the MPCM slurry was comparable to that of water despite the higher viscosity of the slurry. The effect of heat flux, MPCM mass concentration, flow rate and the type of phase change material was investigated. The effective heat capacity of slurry at the location where phase change occurs was found to be considerably higher than that of water. A nondimensional Nusselt number correlation was proposed in order to facilitate design of heat transfer loops with MPCM slurries as working fluid.

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