Study on the indoor thermal environment and energy consumption of a photovoltaic facade building
学生名：ZHOU MENGYUAN
研究テーマ：Study on the indoor thermal environment and energy consumption of a photovoltaic facade building
入学年月:2021.10
修了年月:2023.09
取得学位：修士（工学）
論文概要:This study addresses the high energy consumption of public buildings, which accounts for 40% of China's total building energy use, emphasizing the importance of energy conservation and emission reduction. Among various energy-saving technologies, solar photovoltaic (PV) systems are highlighted as rapidly developing innovations with significant potential. However, challenges such as limited roof space for PV installation and inefficient utilization of heat generated by PV cells remain. The building facade is identified as a promising area for energy-saving improvements by incorporating PV systems with ventilation channels to better utilize heat and improve thermal performance.
Using an experimental office building, the study investigates the effects of a PV facade on the indoor thermal environment and energy consumption through CFD simulation and energy consumption modeling. Key analyses include:
- Ventilation Performance: In winter, the PV facade’s ventilation channel supports effective internal circulation, while in summer, it enhances natural external ventilation.
- Ventilation Channel Optimization: Structural adjustments to the building’s outer wall and ventilation channels were explored to maximize thermal efficiency.
- Energy Consumption Comparison: Rooms with PV facades were compared to those with standard envelopes, analyzing cooling, heating, and power generation using DesignBuilder software.
Findings show that summer ventilation using open airways is effective in maintaining a balanced heat distribution across layers. While PV facades reduce cooling demand in summer, they may slightly increase heating energy consumption in winter. The annual energy output of the PV facade reached 6694 kWh.
This research provides insights into optimizing PV facade designs to improve building energy efficiency, focusing on integrating ventilation and thermal performance to reduce overall energy use in public buildings.