Energy-Saving and Ecological Renovation of Existing Urban Buildings in Severe Cold Areas: A Case Study

High-rise buildings in cold regions have a requirement of ecological improvement due to the continuous response climate change throughout year. This study evaluates wind environment, light thermal and energy consumption environment using Phoenics, Ecotect, DesignBuilder tools, utilizing high-rise residential building an intensely place as example. With goal repairing buildings, green energy-saving measures are applied from perspectives form, structure, system, equipment strategy. The rates carbon dioxide emission reduction renovated were predicted. results reveal that, performance diagnostic, speed clearly rise at building’s corner, particularly on outdoor level top floor; meanwhile, inside lighting is insufficient, there glare hazard adjacent window. target has unquestionably increased following repair 12 measures, including bay windows, exterior walls, solar energy. influence strong winds winter tranquil summer greatly decreased terms environment. In indoor more uniform; range (Universal Design index) UDI100–2000 9.2% 32.7%; UDI2000, which may cause glare, by 28.4%. Energy savings pollution high 19.8% 38.8%, respectively, installation photovoltaic panels. Based all overall saving rate was 63.8%, CO2 90.3%.