# Architectural Simulation of Hybrid Energy Harvesting: A Design Experiment in Lanzarote Island
## 5 Results and Discussion  
This study develops an energy self-sufficient architectural design for a building that will be built in Arrecife, the capital of the Spanish territory of Lanzarote Island, to create a square design. In order to improve the energy self-sufficiency of the building, energy harvesting technology, which generates energy from natural energy sources, is used in the architecture. The architectural design based on energy harvesting technology developed in this study primarily uses solar energy-based energy harvesting. To harvest energy from sunlight, solar panels are installed on the roof of the pergola. In order to improve the efficiency of the solar modules in energy harvesting, they are installed at a certain tilt angle to the roof surface. In this study, the optimal tilt angle is calculated for each month from January to December. A function that takes into account the latitude of the location of the research subject and the declination of the sun is used to select an installation angle for the solar panels. Measuring all solar panels on the pergola roof to which each optimal tilt angle calculated is applied using Revit and Insight for the total renewable energy produced yields the result that a total of 504 (756 m\({}^{-2}\)) solar panels could generate a total of 1,150,198 kWh\(\cdot\)year\({}^{-1}\) energy. Furthermore, this study develops an architectural design based on wind energy. To convert wind into renewable energy, this study uses piezoelectric materials to convert  
Figure 12: The expected image of piezoelectric materials to be installed under the roof of the pergola at Lanzarote Dynamic Square. tiny vibrations caused by the wind into renewable energy. This study analyzes the monthly wind speed and direction at the study site from January to December to collect data on wind resources at the study site. Then, this study analyzes previous studies on piezoelectric materials that convert tiny vibrations caused by the wind into renewable energy. Based on prior studies, this study decides the wind direction and the location selection when it comes to the form of the piezoelectric materials and their installation. As a result, when a total of 1680 (241.92 cm\({}^{-3}\)) prototypes of piezoelectric materials (LDT4-028 K/L), which are each 60 mm long, 120 mm wide, and 0.2 mm thick, are installed under the pergola roof, an annual total of 6725.376 \(\upmu\)W\(\cdot\)year\({}^{-1}\) energy is expected to be generated by the wind power at the research subject location. This study is significant, as the architectural design proposed here based on energy production is a hybrid technology that uses two natural energy sources: the sun and wind. Energy harvesting technology has been used as an important element in architectural design. Solar panels flexibly installed according to the optimal monthly tilt angle to maximize solar energy harvesting and piezoelectric materials installed on the building surface to harvest energy from wind can be used as important elements in green building design. Such hybrid energy harvesting technology applied to building surfaces can play an important role in the development of diverse and creative architectural design and can promote active research on architectural materials that aim to generate renewable energy from the perspective of green building design. The flexible solar panel mounting system is attached to building facades, unlike traditional fixed solar panels, and can play an important role in developing diverse and creative architectural designs. Moreover, in the case of piezoelectric materials, it can stimulate active research in the field of building materials for building facade design. Therefore, this study on hybrid energy harvesting technology is of great significance, as it is different from previous studies that focus on energy harvesting with a single energy source. Unlike existing green building design, this study's novelty lies in the possibility of using a kinetic roof and piezoelectric materials.