Affiliation:
1. South China University of Technology
2. Central South University of Forestry and Technology
Abstract
This experiment is performed to investigate heat transfer characteristics with the PCM microcapsule slurry in a solid phase state at a horizontal rectangular enclosure heating from below and cooling from top. Some important parameters are taken into account such as the mass concentration of the PCM, the temperature difference between heating plate and cooling plate, Nusselt number Nu, Rayleigh number Ra and the aspect ratio (width/height) of the horizontal rectangular enclosure. Experiment is done under the thermal steady condition in the PCM microcapsule slurry. Heat transfer coefficient is measured under various temperature differences in PCM mass concentrations of 10% and 20%. And relationship with Nusselt number Nu and Rayleigh number Ra is summarized to various heights H or the aspect ratio (width/height) Ar of enclosure.
Publisher
Trans Tech Publications, Ltd.
Reference14 articles.
1. S. Kakac, W. Aumg and R. Viskanta et al., Natural Convection: Fundamentals and Application, Hemsiphere, Washington, DC, (1985).
2. Adrian Bejan, Allan D. Kraus et al., Heat transfer handbook, John Wiley & Son, Inc, New York, (2003).
3. Yinping Zhang, Xianxu Hu and Xin Wang, Theoretical analysis of convective heat transfer enhancement of microencapsulated phase change material slurries, Heat and Mass Transfer 40 (2003) 59-66.
4. Jian Jin, PeiQing Liu and GuiPing Lin, Numerical simulation of heat transfer of latent functionally thermal fluid in tubes with coaxially inserted cylindrical bars in laminar, Science in China Series E: Technological Sciences 51 (2008) 1232-1241.
5. Colvin DP; Mulligan JC and Bryant YG, Enhanced heat transport in environmental systems using microencapsulated phase change materials, SAE Tran. 101 (1992) 717–725.