Design essentials and operation effect of ultra-low energy consumption residential buildings in severe cold zone—A case study of Zhonghai Heshandaguan project

At present, China’s ultra-low energy buildings are mainly distributed in cold zone such as Beijing, Tianjin, Hebei, Henan and Shandong, and a few projects are in hot summer and cold winter zone. In fact, ultra-low energy consumption buildings have great benefits in severe cold zone. Due to the long and extreme cold winter, the requirements for thermal insulation performance would be higher. The severe cold climate condition would also be a challenge to the performance of doors and windows, the performance of equipment systems, and the safety of thermal insulation installation. So far, there are rarely large scale ultra-low energy consumption residential groups in severe cold zone. Regarding to the technical difficulties faced in the region, effective solutions are urgently needed for the industry. Taking the Zhonghai Heshandaguan project as an example, figures out the design essentials of ultra-low energy consumption residential projects in severe cold zone, including the design of envelope insulation, external windows, thermal bridges, air tightness, cold and heat source systems, and renewable energy applications, etc. Carries out a comprehensive analysis of the operating data of the case project, and evaluates the effect of the implementation of ultra-low energy consumption technical measures. The research results can provide technical reference for the large-scale implementation of ultra-low energy consumption building projects in severe cold zone in the future.