Study On Low Melting Temperature Inorganic PCM With High Latent Heat And Their IR Thermal Graphic Decoy

The IR thermal graphic decoy simulative of inorganic phase change materials(PCM) which has excellent heat-saving and heat expanding capability was studied in this paper.Through the analysis of the relationship between inorganic PCM's structure and latent heat,tried to find or compose higher latent heat inorganic PCM which has suitable melting temperature.Self-heating materials was researched to satisfy the heating and heat-preservation of PCM outside.The Self-heating materials can also compensate for the shortage of low latent heat PCM.After investigateing the commercial PCM,NH₄Al(SO₄)₂·12H₂O,CH₃COONa·3H₂O,Na₂HPO₄·12H₂O which has suitable melting temperature and higher latent heat were selected to simulative IR thermal graphic of tank.Nucleation was added to prevent the sub-cooling of PCM and thickeners was add to prevent phase segregation.After modified,the latent heat of PCM has a certain decline.To use kJ/mol replace kJ/kg as unit of PCM latent heat which making the PCM latent heat and the structure have a more direct link,analysis the relationship between the structure and latent heat of inorganic PCM.Gained the relationship which can predict there is not inorganic PCM which has low melting temperature and high latent heat of the inorganic compound and hydrated salt's structure and latent heat。Use stronger ligand EDTA to replace H₂O to find higher latent heat PCM,the result showed that the Coordination Complex used EDTA which was decomposing after phase changed can not be used as PCM.Commercial self-heating materials were improved to satisfy the PCM heating and insulation requirements.Designed decoy modules,and test the heating and insulation properties of self-heating material.