Abstract
Improving energy performance in institutional buildings matters because it lowers operating costs and supports sustainability objectives. In this thesis, the Sacramento State Library serves as the case study. It focusses on improving energy consumption and potential for renewable integration. The analysis combines Building Information Modeling (BIM) with Building Energy Modeling (BEM). First, a 3D model was created by Autodesk Revit. This model was used as the basis for all energy analysis. The model was simulated by Autodesk Revit Energy Analysis, and eQUEST. Both of them help to show how much energy consumption of the library is. However, Autodesk Revit is more basic when compared with eQUEST. eQUEST allows users to simulate detailed about hour operation, HVAC system, thermal loads, lighting, and plug loads. Moreover, eQUEST also supports model calibration using real operational data. The results show that annual energy use is typical of large academic facilities: the modeled EUI was 28.14 kWh/ m²·year, while the measured value reached 28.83 kWh/ m²·year. At the same time, the 192 kWp rooftop photovoltaic (PV) system was simulated in PVsyst. It produced about 322.45 MWh/year of electricity. That output covers roughly 43.35% of the building’s electricity demand and maintains a strong Performance Ratio (PR) of 0.847. The study found out the benefit of BIM and BEM integration. It helps to understand energy consumption of the building. Based on the study, there is more than one strategy to improve energy efficiency. First, using Revit to schedule the time of the HVAC and light system can reduce energy consumption by 2.4%. Second, expanding the rooftop PV system by 110 kWp can increase renewable generation by 21%. These actions would help to lower carbon emission, reduce energy consumption, and support the long-term sustainability goals.