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Medientyp:
E-Book
Titel:
Thermal Performance Analysis of Horizontal Latent Heat Energy Storage with Irregular Snowflake Fins Based on Response Surface Methodology Optimization
Beschreibung:
The horizontal sleeve phase change heat storage unit filled with RT55 is taken as the research object. Aiming at the low thermal conductivity of phase change materials (PCM), an irregular snowflake-shaped longitudinal fin structure was proposed to improve the melting performance of horizontal latent heat storage sleeves (LHTES), and the phase change heat transfer process was simulated by numerical simulation. The melting of ordinary rectangular longitudinal fins and snowflake longitudinal fins under PCM natural convection was studied. The results show that the snowflake fin structure can significantly shorten the heat filling time of LHTES, which is 45.92% less than the traditional fin melting time. Reasonable changes of fin length, width, shape and distribution angle can shorten the heat filling time. The thermal performance of the heat storage system is analyzed by taking heat filling time, heat storage capacity and heat storage temperature as evaluation indexes, and the optimal fin distribution angle α = 40° is obtained. The response surface method (RSM) was used to optimize the geometric parameters of the fin, and the optimal solution was that the fin end length was 13mm, the width was 0.58mm, and the bifurcation angle was 40°