Multilayer Thermal Insulation Structure Design and Thermal Insulation Effect Evaluation Based on Silica Aerogel
Objective:Porous insulation materials have the advantages of designability,functionalization,and good assembly,but they are difficult to achieve efficient insulation in a short period of time.Methods:In this paper,silica gas gel was used as the main body and paraffin as the phase change medium to build a multi-layer insulation structure.By studying multi-layer composite structures,the thermal conductivity of composite multi-layer composite structures under different service conditions is obtained.Result:Research has shown that the insulation effect of this material is closely related to the phase change materials and combination methods used.Among them,the layered(double-layer)sandwich structure with paraffin filled aerogel as the middle layer has excellent thermal insulation performance.After 10 minutes,the cold end temperature of the 10 mm thick sandwich structure was only 59℃,much lower than the 67℃and 71℃in other modes.Conclusion:The essence of this optimization method is to achieve short-term and high-efficiency insulation effects by changing the heat transfer pathway of MTIS,providing new ideas for its application in various insulation scenarios.
multilayer thermal insulation gas gelphase change materialsefficiency
NETL
NSTL
万方数据
维普
