Abstract
With the rapid development of urbanization, the Chinese government has put equal emphasis on construction and retrofitting. But those projects did not achieve optimal effect because of the lack of targeted and systematic design guidance system. In this study, it first analyzes existing retrofitting methods and sorts into five retrofitting types as a basis, and then, captures the combi-nations and permutations of retrofitting methods and materials by parts and layers to build a database. After that, it combines different kinds of ap-proaches by hierarchical matrix method to conclude the most efficient strat-egy. This study also selects typical residential buildings built between 1980 and 2000 in cold climate area of Northeast China as the research objects to test the integrity and effectiveness. As the results of this paper, it provides systematic guidance and multiple performance-based retrofitting strategies of the existing residential envelope system, which can improve indoor ther-mal comfort with low energy consumption.
Highlights
With China’s urbanization exceeding 53% [1], the huge amount of housing stock accounts for more than three-quarter of the existing building, which consumes a lot of fossil fuel to meet the new standards of building performance
It is imperative to carry on energy-efficiency retrofitting on building envelope system to improve living quality and physical conditions of residential building
Based on above problems, existing residential buildings built between the 1980 and 2000 in Northeast China are regarded as research objects, because of the intact and unified masonry construct, low construction standards, high energy consumption, and poor thermal performance
Summary
With China’s urbanization exceeding 53% [1], the huge amount of housing stock accounts for more than three-quarter of the existing building, which consumes a lot of fossil fuel to meet the new standards of building performance. The performance-based retrofitting of envelope system has huge economic and environmental effects. Based on above problems, existing residential buildings built between the 1980 and 2000 in Northeast China are regarded as research objects, because of the intact and unified masonry construct, low construction standards, high energy consumption, and poor thermal performance. This study first captures the combinations and permutations of retrofitting methods and materials by parts and layers to build a database. It focuses on combining the individual component retrofitting approaches in simulation tool to solve the compatibility of the whole envelope system and improve energy efficiency in retrofitting project.
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