THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

online first only

Preparation and characterization of phase change energy storage gypsum

ABSTRACT
The thermophysical properties of binary phase change materials with different ratios of capric acid and palmitic acid were studied by step cooling curve method and differential scanning calorimetry in this paper. Furthermore, the best adsorption materials and coating materials were selected by testing their mass adsorption rate and mass loss rate. Finally, the specific heat capacity, thermal conductivity coefficient and compressive strength of phase change energy storage gypsum (PCESG) was determined respectively, and the energy-saving effect of the PCESG in the wall is evaluated. The results show that the binary phase change materials can form a eutectic system. When the mass ratio of capric acid to palmitic acid is 7:3, the low eutectic point of the binary system is formed, and the crystallization temperature of system is 26°C. The adsorption capacity of expanded perlite is much larger than that of ceramsite, and the mass loss rate of the material coated by styrene acrylic emulsion is lower than that of EVA. The specific heat capacity of PCESG is about twice that of ordinary gypsum. With the addition of phase change materials, the thermal conductivity coefficient of PCESG decreases gradually, and the compressive strength of PCESG decreases gradually at the same time. Compared with ordinary gypsum, PCESG has better energy-saving performance.
KEYWORDS
PAPER SUBMITTED: 2020-01-24
PAPER REVISED: 2020-07-08
PAPER ACCEPTED: 2020-07-12
PUBLISHED ONLINE: 2020-08-08
DOI REFERENCE: https://doi.org/10.2298/TSCI200124217Z
REFERENCES
  1. Wang, J., et al. Construction of CNT @ Cr-MIL-101-NH2 hybrid composite for shape-stabilized phase change materials with enhanced thermal conductivity. Chemical Engineering Journal, 350 (2018), pp. 164-172.
  2. Energy saving design standard for residential buildings in severe cold and cold regions (JGJ 26-2010).
  3. ZHANG, N., et al. Lauric-palmitic-stearic acid/expanded perlite composite as form-stable phase change material: preparation and thermal properties. Energy and Buildings, 82 (2014), pp. 505-515.
  4. YANG, Z., et al. Thermal stability of binary multiple capric acid-lauric acid as phase change materials. Building Science, 31 (2015), 2, pp. 60-64.
  5. Cai, W., et al. Phase transition characteristics of lauric acid-tetradecanol binary phase change materials. Journal of Solar Energy, 38 (2017), 9, pp. 2493-2497.
  6. LIU, H., et al. Study on binary phase transition materials of lauric acid-capric acid used in wall materials. Brick and Tile, 5 (2019), pp. 25-28.
  7. REN, X., et al. Preparation of porous carbons from PVDF and characterization of its carbon dioxide adsorption properties. Material Report, 27 (2013), 22, p. 2487.
  8. ZHOU, S., et al. Preparation and properties of decyl alcohol-palmitic acid/expanded graphite low temperature composite phase change material. CIESC Journal, 70 (2019), 1, pp. 70(1) 290-297.
  9. LI, L., et al. Preparation and characteristics of ternary fatty acid/expandedperlite composite phase change materials. Journal of Nanjing Tech UniversityNatural Science Edition, 38 (2016), 4, pp. 11-16.
  10. LIU, M., et al. Research progress of expanded graphite matrix shape-stabilized phase change material. New Chemical Materials, 46 (2018), 12, pp. 6-10.
  11. SHAJIM, A. M. Phase change materials integrated in building walls: a state of the art review. Renewable and Sustainable Energy Reviews, 31 (2014), pp. 870-906.
  12. Fu, L., et al. Preparation and properties of decanoic acid-myristic acid/diatomite stereotyped phase change energy storage materials. Functional materials, 44 (2013), 10, pp. 1465-1468.
  13. Xiao, C., et al. Study on the performance of phase change energy storing gypsum boards. New Chemical Materials, 36 (2018), 6, pp. 90-92.
  14. WU, S., et al. Preparation and thermal properties of high performance shape-stabilized phase change composites using stearic acid and expanded graphit. CIESC Journal, 66 (2015), 12, pp. 5127-5134.
  15. HU, X., XIAO, D. Research on the properties of the phase change power storage building material temperature response through ANSYS. Material Report, 23 (2016), 11, pp. 83-86.
  16. KONG, X., et al. Multivariate thermal performance analysis and optimization for phase change thermal storage wallboard. Building Science, 32 (2017), 8, pp. 40-46.
  17. Gypsum plaster (GB/T 28627-2012).
  18. Thermal insulation materials - Determination of steady state thermal resistance and related properties - Guarded hot plate method (GB/T 10294-2008).
  19. Unified technical code for application of wall materials (GB 50574-2010).