Energy consumed by institutional buildings at their operational phase is one of the significant sources of carbon discharge throughout their service life and directly affects global warming. Therefore, it is vital to analyse the energy use intensity (EUI) and energy cost of institutional buildings at Kaduna State University using Building Information Modeling (BIM) technology. It is for these reasons that this study investigates the energy performance of an institutional building using BIM technology. In this study, the faculty of pharmaceutical science at Kaduna State University was selected for assessment. Autodesk Revit 2019 software was used to generate a 3-D model of the faculty building and also to analyse the cooling and heating loads. Nine different scenarios of the building model were created for both energy use intensity (EUI) and energy cost using Autodesk Insight 360. Each scenario of the model was optimized, and the EUI and energy cost scores were compared with the American Society of Heating, Refrigeration, and Air-conditioning Engineers (ASHRAE 90.1) Standard. Furthermore, Autodesk Green Building Studio (GBS) was used to validate the EUI, while energy cost optimization scores were obtained using Autodesk Insight 360. Simulation results showed that the EUI and energy cost of the faculty building before optimization were 247 kWh/yr and $20.1/m2 /yr, respectively, while after optimization they were 171 kWh/m2 /yr and $16.3/m2 /yr, respectively. Thus, a savings of 76 kWh/m2 /yr was optimised, and the EUI and energy cost scores were compared with the American Society of Heating, Refrigeration, and Airconditioning Engineers (ASHRAE 90.1) Standard. Furthermore, Autodesk Green Building Studio (GBS) was used to validate the EUI, while energy cost optimization scores were obtained using Autodesk Insight 360. Simulation results showed that the EUI and energy cost of the faculty building before optimization were 247 kWh/yr and $20.1/m2 /yr, respectively, while after optimization they were 171 kWh/m2 /yr and $16.3/m2 /yr, respectively. Thus, a savings of 76 kWh/m2 /yr and, with the exchange rate of $1 to $485, a conversion of $3.8/m2 /yr of the EUI and energy cost, respectively, of the building under study were achieved. Hence, the use of BIM technology has clearly shown that it can be used for optimization of EUI and energy costs in institutional buildings, thereby reducing carbon dioxide discharge and expenditures.

Keywords : Autodesk, Efficiency, Energy, Revit.