Dissertation > Excellent graduate degree dissertation topics show

Preparation and Properties of Binary Organic/Inorganic Nano-composite Phase Change Materials for Thermal Energy Storage

Author: ChangJin
Tutor: DuanWuBiao
School: Beijing Jiaotong University
Course: Chemical Engineering
Keywords: Clay The organic phase change material Eutectic Intercalation compound Composite phase change thermal storage material
CLC: TB383.1
Type: Master's thesis
Year: 2010
Downloads: 236
Quote: 0
Read: Download Dissertation

Abstract


The depletion of fossil energy crisis and environmental pollution problem is getting people's attention, improve energy efficiency and development of renewable energy is one of the important issues facing humanity. Thermal energy storage is an important means of improving energy efficiency is one of thermal energy storage can be used to solve the heat between supply and demand in time and space do not match the contradiction. Latent heat storage is one of the important thermal energy storage, which in daily life applications can be traced back to ancient times, but the foundation phase change thermal storage rise of theoretical and applied research and development only a few decades old. In recent years, phase change thermal storage research and application of rapid development. Our research in this area compared with some developed countries is still relatively weak, especially in applied research, there are still many problems to be solved. This article first organic solid - liquid equilibria are discussed and analyzed, and for solid - liquid equilibrium phase diagram, latent heat and energy efficiency were determined for solid - liquid phase change heat storage material provides a simple screening feasible method of operation. Secondly, this paper monobasic organic phase change material shortcomings and deficiencies, launched a binary complex system research. Using the freezing point depression of the theoretical principles, we use step cooling curve method of lauryl alcohol - fatty acids - fatty acids binary solid - liquid equilibrium relationship, plotted TX phase diagram of these systems. Test showed that these groups are simple Binary Mixture eutectic system; combined DSC analysis technique to determine the binary complex system of eutectic composition, phase transition temperature and enthalpy. After the study, these low melting point phase change of the phase transition temperature of the mixture are in the desired temperature range. Next, we use a quaternary ammonium salt, triethanolamine, amino acids and other non-reactive organic modifiers for organic modification of the clay and to study and explore the optimum conditions of the experiment. Preparation of the organic modified clay mineral modified clay the best experimental conditions: concentration of 5% clay, stirring time was 2.5h, modification temperature was 55 ℃, organic modifier / clay mass ratio of 0.70. Again, we use the intercalation compound prepared in binary organic / inorganic nano-composite phase change thermal storage material, and its preparation conditions were systematically studied, and the use of X-RD, FT-IR, SEM, TEM, DSC , TG, TC, etc. carried out structural analysis and characterization. The results show that the resulting composite phase change thermal storage material performance is more superior, better overcome the pure phase change thermal storage material shortcomings and deficiencies. And of binary organic / inorganic nanocomposite materials for thermal storage simple modification of a preliminary study. Finally, we prepared binary organic / inorganic nano-composite material phase change thermal storage heat storage capacity of the various factors discussed. Preparation of organic / inorganic composite phase change thermal storage materials, the best experimental conditions were: organic matter content of 55% to 60%, the preparation of composite time 5h, preparation of composite temperature of 70 ~ 80 ℃, the composite phase change thermal storage material particle size 60 to 120 mesh.

Related Dissertations

  1. Study on the Variation of Soil Clay Minerals and Influence Factors in Karst Regions under Different Rocky Desertification, Southwest China,X171
  2. Preparation and Properties of LDPE, EVA, EPDM Modified EPM Foam Materials,TB383.4
  3. Test Research on Deformation Characters of Consolidation and Creep for Soft Clay under Different Drainage Conditions,TU447
  4. Research on Clay Minerals and Yield Stress of Debris Flow by Experiments,P642.23
  5. Analysis of Stability of Laterite Foundation Pit Slope in Hainan,TU753
  6. The Research on Durability of Solidified Material Used on Roadbed,U414
  7. Coupled Calculation of the Solidification Paths of Ternary Eutectic Alloys Based on Thermo-Calc,TG111.4
  8. Semi-circular breakwater foundation bearing capacity calculation method,U656.2
  9. Research on Deformation Characteristics of Soft Clay in Tianjin under Seismic Loading,TU435
  10. Dynamic Properties of Fly Ash Mixed Soil,TU435
  11. Experimental Investigations on Liquid Limit and Plastic Limit of Contaminated Silty Clay,TU41
  12. Study on the Preparation and Analysis of Pharmaceutical Cocrystals,TQ460.6
  13. The Research on the Technology of Purifying, Activating Bentonite and Producing White Carbon,TD985
  14. The Research of Preparation Technology of High Strength Hyper-Eutectic Al-Si Alloy,TG135.1
  15. Study on the Artistic Language of Clay Animation,J594
  16. Henry Clay and the War of 1812,K712
  17. The Chronosequence Evolvement of Tropic Basalt-Derived Soil in China,S151
  18. Study on the Slope Deformation Failure Mechanism, the Support Design and the New Construction Technology of Foundation Pit with Red Clay,TU753
  19. Qianzhong red indicators particularity study of physical properties of clay,TU411.2
  20. Experimental study on purification sandy kaolin beneficiation,TD97
  21. Process Research and Properties Test of Porous Copper Fabricated by Gasar,TG146.11

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
© 2012 www.DissertationTopic.Net  Mobile