## 1 Introduction
[PERSON] [17] investigated the effect of wind on the optimum design parameters for solar chimneys and showed that the optimum passage width rose from 0.2-0.3 m to 0.4-0.5 m. [PERSON] [18] used numerical simulation to investigate the effects of channel width ratio and chimney inclination on the natural ventilation performance of a new rooftop solar chimney at different outdoor wind speeds. The results showed that the trend of the ventilation rate varied with the increase in passage width. The mass flow rate of the new structure increases with the increase in inclination angle. [PERSON] [19] investigated numerically and theoretically the interaction between solar chimneys and outdoor winds and showed that higher wind speeds do not represent better ventilation performance, depending on the angle between the wind direction and the window, with solar chimneys exhibiting the best ventilation performance when the angle is 0. The thermal buoyancy created by the difference in air density in a building can drive natural thermal pressure ventilation, an energy efficient ventilation method used to obtain higher air quality. [PERSON] [20] investigated the effect of heat sources of different heights on the effect of natural ventilation driven by buoyancy forces by means of the scaled-down experimental water tank method and compared the experimental results with the theoretical calculations. The formulae for the effect of the model's effective inlet and outlet opening areas on the natural convection heat of the heat plume above the heat source were analyzed, and the area above the heat source was divided into a continuous plume zone, an interval plume zone, and a floating plume zone. [PERSON] [21] investigated the interaction of heat plumes generated by two heat sources of the same intensity in a naturally ventilated space. The results show that when two heat sources are close to each other, the heat plumes from both come into contact immediately above the heat sources, and that the peak values of the velocity and temperature fields in the room do not change much with increasing the distance between the heat sources, while the room height remains constant. [PERSON] [22] analyzed the heat transfer and flow transition characteristics of the thermal plume generated by the bottom-ground central heating element in a two-dimensional, rectangular enclosure when the Rayleigh number Ra was varied using thermal lattice-Boltzmann equation calculations. From the available experimental and numerical simulation studies, it can be seen that the current research on solar chimneys focuses on the influence of structural and environmental parameters on their ventilation performance. In practice, in some buildings with high indoor heat sources such as substation rooms and data rooms, high indoor temperatures can affect the efficiency of machines and the thermal comfort of the human body when high-temperature heat sources are present in the room. In order to improve the indoor thermal environment, when using a solar chimney for natural ventilation, there is a solar chimney effect coupled with the outdoor wind and the heat plume of the indoor heat source. To address this problem, this paper establishes a three-dimensional numerical simulation of a solar chimney coupled with the outdoor wind field and indoor heat plume. analyzes the effects of outdoor wind speed \(V\), indoor heat source heat flow density \(W\), solar radiation intensity \(I\) and the relative position of the indoor heat source on the ventilation performance of the solar chimney. Provides a reference basis for the design, application, and optimization of solar chimney-induced ventilation in energy-efficient buildings.