Developing Reference Building for Campus Type Buildings in Universitas Gadjah Mada

The building sector has been the highest consumer in the total energy consumption in Indonesia, in which the building sector shared 39 of the national energy consumption. A university is a campus that consists of the landscapes and buildings with many kinds of academic and social activities that creates a type of energy consumption profile. This paper aims to demonstrate the importance of having a complete and reliable audit data of a university to develop reference building for campuses. The reference building serves as a building benchmark model for energy consumption, for 20 faculties in Universitas Gadjah Mada (UGM) with more than 200 buildings. The energy consumption model of the buildings is developed using the CLTD/SCL/CLF calculation method. Data of the building geometry, building envelope, and building profile are using data collected from a green campus assessment tools (GreenmetricUI) by walkthrough audit. The research compared the energy profile obtained from the audit data and the model calculated. It is shown that the energy profile model from the CLTD/SCL/CLF method is generally higher than the reported energy consumptions from electricity bills. It can be concluded that the main success in developing a reference building is by having a reliable audit data and a complete record of the electricity bills to validate the model. Once the energy profile obtained from the CLTD/SCL/CLF modeling is available, the data can be used for modelling reference building using energy model software.