Study On Low-Carbon Design Optimization Method And Application Of Low-Temperature Granary Roof Insulation

Low-temperature grain storage is a popular green grain storage technology.However,the high energy consumption of low-temperature granary is not conducive to the promotion and utilization of low-temperature grain storage technology.The total carbon emissions in the construction sector accounts for a higher percentage of the total carbon emissions in China,which is not beneficial to the sustainability of China’s construction.The targets of Carbon Peaking and Carbon Neutral set by China have put forward new requirements for building energy saving and emission reduction and low-carbon design of buildings.The roof of the building receives the most solar radiation heat.Thus,the roof is a key part of the building insulation design.Although architectural low-carbon design is receiving increasing attention and concern,a mature and practical theory and method of low-carbon design for buildings is still lacking,which is not conducive to building energy conservation and sustainable development.Therefore,the analysis and research on the theory and method of low-temperature grain silo roof insulation and low-carbon design is of great practical significance and high engineering application value.Although carbon reduction measures such as carbon trading and carbon tax are beneficial to reduce the carbon emission of buildings,the research on the influence of carbon emission cost on the optimization of building envelope insulation design is still very insufficient.In response to this actual situation,this study gives a low-carbon design optimization method for low-temperature granary roof insulation,which can be used to prefer the best design of low-temperature granary roof insulation and efficiently reduce the consumption of energy and carbon footprint of low-temperature granary roof.Firstly,this paper establishes a comprehensive economic analysis model of building roof insulation based on the traditional economic analysis model and considering the influence of carbon emission cost,which can be used to analyze the economy of the design scheme of low-temperature grain silo roof insulation.Then,a balanced index consisting of a carbon reduction factor and an additional economic input factor is used to quantitatively evaluate the carbon reduction effect of building roof insulation.The influence of carbon emission cost,grain storage temperature,service life and recycling of insulation materials on the low-carbon design of low temperature granary roof insulation is studied,and it is found that considering carbon emission cost can improve the economic performance of roof insulation.The lower the grain storage temperature,the better the economic performance of roof insulation.The longer the service life of insulation materials,the better the economic performance of roof insulation.The recycling of thermal insulation material is conducive to reducing the carbon emission of roof insulation of granary.Finally,the proposed comprehensive economic analysis model of low-temperature granary roof insulation and low-carbon design optimization method are applied in seven ecological grain storage areas in China,and the priority order of evaluation index for carbon emission is recycled EPS > recycled XPS > non-recycled EPS > non-recycled XPS >recycled RW > recycled PU > non-recycled RW > non-recycled PU.Recycling EPS is the best low-carbon design solution for low-temperature granary insulation,and the different outdoor climates of China’s seven ecological grain storage areas will have a significant impact on the economic performance and carbon reduction effect of low-temperature granary roof insulation.