Research on Optimization of Multi-layer Wall Thermal Performance with Phase Change Materials(PCMs)

学生名:高 艳娜

研究テーマ:Research on Optimization of Multi-layer Wall Thermal Performance with Phase Change Materials(PCMs)

(相変化材料（PCMs）を用いた多層壁熱特性の最適化に関する研究)

入学年月:2014.10

修了年月:2017.09

取得学位:博士（工学）

論文概要:This research focuses on optimizing the thermal performance of multi-layer walls integrated with phase change materials (PCMs) to enhance energy efficiency in buildings. PCMs are an effective latent heat storage technology that reduces heating and cooling demands by stabilizing indoor temperatures and shifting peak loads. The study investigates the principles, methods, and applications of PCMs in building walls, comparing their use in Japan and China.

Theoretical analyses establish equations for determining the PCM phase-change temperature range, considering factors such as wall structure, outdoor temperature, and material properties. These calculations are validated using enthalpy-porosity heat transfer models and experimental data under various design scenarios, including different PCM layer locations and wall structures.

Case studies in Chengdu, China, and Fukuoka, Japan, evaluate the impact of PCM-integrated walls on thermal performance. Results show that PCMs significantly reduce heat flow, stabilize indoor temperatures, and delay peak heat loads, especially when air-conditioning operations align with PCM phase-change design conditions. For instance, in summer, a PCM layer placed closer to the inner surface of a wall achieves a greater temperature reduction and delayed thermal response.

The research highlights the potential of PCMs to improve energy efficiency and thermal comfort in different climates and wall systems, providing practical insights for incorporating PCMs into building designs to achieve sustainable energy goals.