## 5 Results and Discussion  
This study was conducted to construct a building in a virtual space and simulate the production of solar-based renewable energy. The research measured the amount of energy generated by kinetic photovoltaics placed on three sides of a car park building to be built in Seoul, excluding the north side, over one year through 2023. A car park building was selected as the research subject because such buildings are an essential urban element for the operation of a city. Car park buildings require an economically efficient design that accommodates the maximum number of vehicles in a limited urban space and a creative architectural design that goes beyond the functional aspect of simply storing vehicles and blending in with the urban landscape. First, we planned to construct the entire parking lot floor as a ramp, instead of a large ramp for the vehicle traffic line connecting each floor of the building, for an economical architectural design. The results of the floor plan of the car park building demonstrate that the plan in which the entire floor of the building was composed of ramps secured more parking space than the plan that included a large vehicle ramp. This is a basic study on architectural design, focusing specifically on creating an optimal design for a parking lot in an urbanized space. If we assume that an actual parking \begin{table}
\begin{tabular}{c c c c} \hline \hline \multirow{2}{*}{**Month**} & **Optimal Tilt Angle** & **Total Surface Area** & **Energy Generation** \\ \cline{2-4}  & \(\beta\) & **m\({}^{-2}\)** & **kWh-Month\({}^{-1}\)** \\ \hline January & 56.8\({}^{\circ}\) & 2034 & 52,658 \\ February & 48.5\({}^{\circ}\) & 2034 & 62,146 \\ March & 38.3\({}^{\circ}\) & 2034 & 83,348 \\ April & 26.6\({}^{\circ}\) & 2034 & 67,087 \\ May & 17.7\({}^{\circ}\) & 2034 & 47,541 \\ June & 13.4\({}^{\circ}\) & 2034 & 43,238 \\ July & 15.5\({}^{\circ}\) & 2034 & 25,856 \\ August & 23.9\({}^{\circ}\) & 2034 & 64,638 \\ September & 35.3\({}^{\circ}\) & 2034 & 75,991 \\ October & 47.0\({}^{\circ}\) & 2034 & 69,612 \\ November & 55.1\({}^{\circ}\) & 2034 & 52,416 \\ December & 59.1\({}^{\circ}\) & 2034 & 47,855 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Energy generation from kinetic photovoltaics in 2023. Figure 7: Simulation of renewable energy generation from kinetic photovoltaics on the south, east, and west facades of a car park building in March 2023 using BIM. space is to be built based on the results of this study, various variables involved in the construction process, such as the construction manpower and budget, should be considered in the parametric design established in this study. Second, photovoltaics were applied to the building facades for creative building design. Car park buildings have the advantage of being able to attach large photovoltaics because they do not require an interior-to-exterior view or the creation of a large building facade. The photovoltaics to be attached to the building facade were planned to move according to the optimal tilt angle every month. Based on the floor plan and facade plan of the car park building, this study implemented the building and the photovoltaic facade in a virtual space using BIM and then simulated renewable energy generation. To increase energy generation efficiency, photovoltaics were placed on the south, west, and east facades, excluding the north. The research site for the simulation was Seoul, and the period was limited to January-December 2023. As a result, the lowest energy generation (25,856 kWh-month\({}^{-1}\)) was recorded in July, and the highest energy generation (83,348 kWh-month\({}^{-1}\)) was recorded in March. The total energy generated in 2023 was 692,386 kWh-year\({}^{-1}\). In South Korea (the research site), the energy generation efficiency is the highest when the installation angle of the fixed photovoltaic is 30\({}^{\circ}\)[48].