JAUE2024-040: Evaluation of CO₂ Emissions Associated with Construction and Operation of Buildings Through Environmentally Conscious Design

Abstract

In order to build sustainable cities, decarbonization in the building sector is an unavoidable challenge. When assessing CO2 emissions from buildings, it is necessary to evaluate not only the energy consumption during operation, but also the entire life cycle of the building, including material production and construction.

In this study, a medium-sized office was assumed, and the simulation tool “Rhinoceros” was used to clarify the relationship between CO2 emissions during construction and CO2 emissions during operation for each building exterior specification and form. In addition, by calculating the use of daylight in the room at that time, the impact of the exterior specifications, etc. on the environmental load and the impact on the indoor lighting environment were simultaneously evaluated. The results show that eaves are advantageous in terms of construction CO2 + operational CO2. On the other hand, the louvers have lower illumination at the perimeter than eaves and light shelves, but their daylight autonomy is equal to or higher than that of eaves and light shelves, indicating that the louvers have an advantage with respect to the light environment.