Study on pre-calculation of building carbon emission based on the unit scale of regulatory detailed plan in urban renewal:An example of Wuhan Binjiang Business District VII
As China entering the second half of urbanization,the international commitment of"30 targets + 60 visions"indicates that urban renewal and low-carbon planning are the basic background of China's urban construction and development,which means that urban construction and development can only be achieved by stock renewal and low-carbon planning.And urban low-carbon transformational development is the key to stock renewal and achievement of"30 targets + 60 visions".Since 2016,research on carbon emission has developed rapidly both domestically and internationally,but the research spatial scope mainly focuses on administrative units as the main research space in order to get research data and information conveniently.There is almost no research on the pre-calculation of building carbon emission of stock urban renewal plot at the scale of regulatory detailed plan.Reviewing existing research,most of it has focused on the impact mechanism of carbon emission,the constraint mechanism of carbon emission,and the methods,strategies,planning ideas for low-carbon emission reduction.And most existing studies have used both qualitative and quantitative research methods,it is undeniable that there is no relevant research on the pre-calculation of building carbon emission for urban renewal planning and design schemes at the scale of regulatory units.Response to the lack of research on building carbon emission calculation in urban renewal at the scale of regulatory unit in China,this study focuses on the scale of regulatory unit as the research scope and the pre-calculation of building carbon emission as the main research object.Multiple quantitative research methods,tool platforms,and graphical languages are comprehensively used for research and analysis,Energy Plus is the popular and commonly used energy consumption simulation calculation platform and software.Under the framework of energy consumption simulation,three commonly used building carbon emission pre-calculation methods are compared,finally the carbon emission calculation method of"calculating building energy consumption based on planned land type and intensity"is selected.Selected empirical plot,which is to be renewed and is of the scale of regulatory detailed plan,for empirical calculation and analysis of building carbon emission.The empirical plot lies in Wuhan Binjiang Business District VII,it is of 344 hm2 and now in a pending update state,having a comprehensive urban renewal planning and design scheme.Then carry out pre-calculation of building carbon emission after renewal and result analysis according to the urban renewal planning and design scheme;meanwhile calculate the building current carbon emission before renewal.And comes up with the comparison of building carbon emission before and after renewal,the comparison displays that the reduction effect of building carbon emission after low-carbon urban renewal is very significant and can reach about 88%,mainly due to the reduction of high-energy consuming building types and changes in land use functions and properties.It is fully demonstrating that low-carbon urban renewal and planning design can effectively reduce building carbon emission.On the basis of the empirical calculation and analysis,the planning strategies and technical paths of low-carbon urban renewal are carried out from three aspects.The first one is the fully implant low-carbon planning and design concepts throughout the entire process of urban renewal.The second point is to pay attention to the impact of the perspective of large-scale area on the carbon emission of renewal land unit or parcels.It needs to be clarified that the large-scale perspective refers to the spatial scale category in which the pending update land unit is located in,and the former has an area approximately 10 times size than the pending update land unit,and the two are functionally related.The property of large-scale area has significant impact on carbon emission for renewal unit.The third point is to establish design path guidelines for responding to low-carbon urban renewal planning at all levels of the national spatial planning system,and implementing the optimization path of urban form based on plot ratio,land use compactness,and spatial dimensionality.Finally,based on the discussion of the scientific value and practical significance of the study,several research points worth discussing are conducted thorough discussions,and directions for future research are proposed.Based on the selected calculation method for building energy consumption and carbon emission,the pre-calculation of building carbon emission for urban renewal planning and design scheme of empirical plot at the unit scale of regulatory detailed plan can provide effective guidance and inspiration for the optimization and improvement of urban renewal planning and design schemes,and can also be promoted and applied to low-carbon urban renewal in other spatial categories.
pre-calculation of building carbon emissionurban renewalempirical calculation analysis and low-carbon planning strategy studyunit scale of regulatory detailed planWuhan Binjiang Business District VII