This study examines how different primary school campus layouts impact the wind environment and classroom ventilation in Xi’an, using simulations for winter and summer conditions. It evaluates four typical floorplans to find the best for outdoor wind quality and classroom ventilation. During winter, the outdoor wind speed at a height of 1.5 m remains below 5 m/s, adhering to the Green Building Evaluation Standard (GB/T50378-2019). Notably, Scenario 1 achieves higher wind speeds due to the canyon effect between buildings, facilitating effective air renewal. The wind speed amplification factors in all scenarios are within the permissible limit of 2, while Scenario 1 demonstrates superior outdoor wind performance. Wind pressure differences on building surfaces remain within the 5 Pa limit, with Scenario 3 exhibiting the lowest difference of 0.74 Pa, contributing to energy-efficient heating. In summer, Scenario 1 uniquely avoids vortex areas and windless zones, ensuring efficient airflow across the campus. Its open floor planning prevents the formation of stagnant air zones, in contrast to Scenarios 2, 3, and 4, which create enclosed or semi-enclosed spaces promoting vortex formation and windless areas. These findings underscore the benefits of Scenario 1’s design in optimizing both winter and summer wind environments for energy efficiency and occupant comfort. This study recommends including adequately sized spaces in zigzag, branched, or enclosed floor plans to provide airflow and prevent high wind speeds. These results are crucial for shaping upcoming architectural plans to improve the environmental quality of school grounds, leading to improved health and comfort for students and teachers.

In the context of global climate warming, the issue of building energy consumption has become increasingly prominent, with a particular focus on energy management in educational buildings. This study investigates the impact of window usage behaviors in primary school classrooms on building energy consumption, aiming to reveal the dynamic relationship between window-opening behaviors and energy consumption, as well as to propose optimization strategies. A case study was conducted at a primary school, where data on door and window behaviors were collected using wireless smart sensors. Combined with indoor and outdoor environmental monitoring and CFD simulations, this study quantified the impact of window-opening behaviors on building energy consumption. The findings revealed that, in summer, window-opening behaviors exhibited a negative correlation with both indoor and outdoor temperature and humidity. Under high-temperature conditions, individuals tend to close windows to reduce heat entry. In contrast, winter window-opening behaviors showed a positive correlation with indoor and outdoor temperatures, although the probability of opening windows decreased once the temperature exceeded a certain threshold. This study also found that during the winter heating period, energy losses caused by opening external windows were substantial, with daily energy losses amounting to 12.83 kWh. Based on the PMV model, this study proposed an optimization strategy for opening specific windows during winter to maintain thermal comfort. This research provides a scientific basis for the energy-saving design of primary school buildings, helping to reduce energy waste while ensuring indoor comfort and promoting the development of low-carbon campuses.