Thermal Characteristics of Paraffin/Expanded Perlite Composite for Latent Heat Thermal Energy Storage

Abstract This study focuses on the preparation and thermal properties of paraffin/expanded perlite composite as novel form-stable phase change material for latent heat thermal energy storage by vacuum impregnation method. The paraffin could be absorbed in pores of expanded perlite as much as 55 wt% without melted phase change material seepage from the composite and this mixture was described as form-stable composite phase change material. The melting and freezing temperatures and latent heats of form-stable composite phase change material were measured using differential scanning calorimetry analysis. The thermal cycling test indicated that the form-stable composite phase change material had good thermal reliability in terms of the changes in thermal properties after 5,000 thermal cycling. Thermal conductivity of the form-stable composite phase change material was increased by about 46% by adding 5 wt% expanded graphite. The results indicated that the prepared form-stable paraffin/expanded perlite/expanded graphite composite phase change material has a great potential for latent heat thermal energy storage systems solar passive heating purposes due to suitable phase change temperature, high latent heat capacity, good thermal reliability, and thermal conductivity.

[1]  A. Sari,et al.  Thermal Energy Storage Performance of Fatty Acids as a Phase Change Material , 2006 .

[2]  A. Abhat.  Low temperature latent heat thermal energy storage: Heat storage materials , 1983 .

[3]  X. Py,et al.  Paraffin/porous-graphite-matrix composite as a high and constant power thermal storage material , 2001 .

[4]  Zhengguo Zhang,et al.  A novel montmorillonite-based composite phase change material and its applications in thermal storage building materials , 2006 .

[5]  Ahmet Sari, Kamil Kaygusuz,et al.  Thermal Energy Storage System Using Some Fatty Acids as Latent Heat Energy Storage Materials , 2001 .

[6]  He Bo,et al.  Tetradecane and hexadecane binary mixtures as phase change materials (PCMs) for cool storage in district cooling systems , 1999 .

[7]  Luisa F. Cabeza,et al.  Review on thermal energy storage with phase change: materials, heat transfer analysis and applications , 2003 .

[8]  A. Sari.  Thermal reliability test of some fatty acids as PCMs used for solar thermal latent heat storage applications , 2003 .

[9]  T. Chuah,et al.  Fatty Acids as Phase Change Materials (PCMs) for Thermal Energy Storage: A Review , 2005 .

[10]  V. V. Tyagi,et al.  PCM thermal storage in buildings: A state of art , 2007 .

[11]  S. Himran,et al.  Characterization of Alkanes and Paraffin Waxes for Application as Phase Change Energy Storage Medium , 1994 .

[12]  Dorel Feldman,et al.  Latent heat storage in building materials , 1993 .

[13]  Kamil Kaygusuz,et al.  Thermal Energy Storage System Using a Technical Grade Paraffin Wax as Latent Heat Energy Storage Material , 2005 .

[14]  A. Kara,et al.  Surface properties of poly(vinylimidazole)-adsorbed expanded perlite , 2006 .

[15]  A. Sari,et al.  Thermal conductivity and latent heat thermal energy storage characteristics of paraffin/expanded graphite composite as phase change material , 2007 .

[16]  N. Khattab,et al.  Thermal Characteristics of Paraffin Wax for Solar Energy Storage , 2006 .

[17]  D. Feldman,et al.  Fatty acids and their mixtures as phase-change materials for thermal energy storage , 1989 .

[18]  S. Kanev,et al.  Thermophysical properties of some paraffins applicable to thermal energy storage , 1992 .

[19]  Kamil Kaygusuz,et al.  The Viability of Thermal Energy Storage , 1999 .

[20]  Zhengguo Zhang,et al.  Study on paraffin/expanded graphite composite phase change thermal energy storage material , 2006 .

[21]  Zongjin Li,et al.  Granular phase changing composites for thermal energy storage , 2005 .

[22]  S. D. Sharma,et al.  Accelerated thermal cycle test of acetamide, stearic acid and paraffin wax for solar thermal latent heat storage applications , 2002 .