Discussion of Optimized Operation of a nearly Zero Energy Building’s Energy System in China

A nearly zero energy office building was established in north China as a demonstration project to explore the nearly zero energy building’s technical system in China. Not only the building itself, but also the energy system was designed with careful consideration to satisfy its high positioning and experimental verification attributes. Energy system in this building is completely finished and extremely challenging. Two kinds of renewable energy system worked together to serve the building, as operation modes varied accordingly to outside weather conditions. Depending on different system combinations, 4 strategies were found, and in this article, 4 of them are discussed. Energy consumption and system performance were compared and analysed to find an optimized operation