Structural Optimization of Heat Transfer Fins in the Energy Storage System

Abstract

For Problem 1, this paper uses the finite-difference methods to analyze the heat transfer effect of PCMs between two rectangular fins and get the relationship among temperature, time and distance from a fin. Through establishing a physical model based on thermodynamics and adjusting the interval angle between fins, we obtain the change rule of PCM average temperature with time under different interval angles. In order to avoid overlap of fins, this paper selects 20 ° as the final angle. The time required for PCMs to rise from room temperature (273K) to phase change temperature (333K) is about 240s. For Problem 2, this paper extends the model proposed in Problem 1 to adapt to the triangular fin structure. This paper designs a multi-objective optimization model. Results show that the heat transfer effect of PCMs is better when the interval angle is 20 °, the bottom width of the triangle is 0.0025m and the height is 0.025m. In addition, it is concluded that rectangular fins are more conducive to heat transfer than triangular fins.