Development of an ANN-based building energy model for information-poor buildings using transfer learning
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Development of an ANN-based building energy model for information– poor buildings using transfer learning
1. Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong, China 2. Department of Construction Management and Real Estate, College of Civil Engineering, Shenzhen University, Shenzhen, China 3. Oxford e-Research Centre Department of Engineering Science, University of Oxford, UK
Abstract
Keywords
Accurate building energy prediction is vital to develop optimal control strategies to enhance building energy efficiency and energy flexibility. In recent years, the data-driven approach based on machine learning algorithms has been widely adopted for building energy prediction due to the availability of massive data in building automation systems (BASs), which automatically collect and store real-time building operational data. For new buildings and most existing buildings without installing advanced BASs, there is a lack of sufficient data to train data-driven predictive models. Transfer learning is a promising method to develop accurate and reliable data-driven building energy prediction models with limited training data by taking advantage of the rich data/knowledge obtained from other buildings. Few studies focused on the influences of source building datasets, pre-training data volume, and training data volume on the performance of the transfer learning method. The present study aims to develop a transfer learning-based ANN model for one-hour ahead building energy prediction to fill this research gap. Around 400 non-residential buildings’ data from the open-source Building Genome Project are used to test the proposed method. Extensive analysis demonstrates that transfer learning can effectively improve the accuracy of BPNN-based building energy models for information-poor buildings with very limited training data. The most influential building features which influence the effectiveness of transfer learning are found to be building usage and industry. The research outcomes can provide guidance for implementation of transfer learning, especially in selecting appropriate source buildings and datasets for developing accurate building energy prediction models.
building energy prediction,
Introduction
Building construction and operations account for 36% of the global final energy use and 39% of energy-related carbon dioxide (CO2) emissions in 2017 (IEA 2018). In China, the building sector represents nearly 16% of the total global final energy consumption in buildings (IEA 2015). In Hong Kong, buildings are responsible for over 90% of electricity use in 2017 (EMSD 2019), which are the primary users in power grids and significantly influence the supply-demand balance and grid reliability. Building energy prediction models are widely used in evaluating building design alternatives (Asadi et al. 2014), developing energy-efficient optimal control and diagnosis strategies (Li and Wen 2014), and developing the E-mail: [email protected]
data-driven approach, transfer learning,
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