Latent heat thermal energy storage systems exhibit a significant performance over other thermal energy storage systems. The performance of these particular systems during melting/solidification is influenced by their orientation. Therefore, a numerical investigation and experimental validation were conducted. ANSYS Fluent 18.1 is used to develop a numerical model to investigate the effects of the pipe's orientation angle. Parametric analysis of various pipe orientation angles (0°, 30°, 60°, 90°) and various oil inlet temperatures were conducted during the investigation. It was determined that the melting time and absorbed heat flux when the inlet temperature increased from 493 K to 523 K is reduced by 42% and increases by 59%, respectively. Furthermore, the solidification time decreases by 63% when the inlet temperature is reduced from 444 K to 413 K. Increasing the orientation angle of the pipe results in a reduction in the melt fraction by 16.5% as the orientation angle is increased from 0° to 90°. In addition, the orientation angle has a significant effect during the melting, which is influenced by increasing the orientation angle from 0° to 90° by 18.2%. Conversely, the orientation angle has no impact on solid fraction during solidification.

潜热热能存储系统表现出优于其他热能存储系统的显着性能。这些特定系统在熔化/凝固过程中的性能受其取向的影响。因此，进行了数值研究和实验验证。ANSYS Fluent 18.1 用于开发数值模型来研究管道方位角的影响。在调查期间对各种管道方位角（0°、30°、60°、90°）和各种进油温度进行了参数分析。经测定，当入口温度从 493 K 增加到 523 K 时，熔化时间和吸收的热通量分别减少了 42% 和增加了 59%。此外，当入口温度从 444 K 降低到 413 K 时，凝固时间减少了 63%。当取向角从 0° 增加到 90° 时，增加管道的取向角导致熔体分数减少 16.5% . 此外，取向角在熔化过程中具有显着影响，这受取向角从 0° 到 90° 增加 18.2% 的影响。相反，取向角对凝固过程中的固体分数没有影响。