Practice Study On Energy Efficiency Improvement Of Existing Residential Buildings In Luoyang

At present,China is in a historical period of rapid development,and its energy consumption is constantly rising.As energy and environmental issues become increasingly prominent,energy-saving transformation of various industries is an inevitable choice.For the construction industry,with the improvement of energy-saving design standards,the energy consumption of new buildings has been significantly reduced,and energy-saving renovation of existing buildings has become the main measure to reduce building energy consumption.This paper combines the energy-saving renovation of existing residential buildings in Luoyang,and analyzes the heating energy consumption of typical residential buildings in urban and rural areas.Based on the results of energy consumption analysis,various transformation schemes are proposed for each part of the envelope structure.This paper combines the life-cycle theory to establish a life-cycle cost evaluation framework for energy-saving renovation projects.This paper evaluates the life-cycle cost-effectiveness of the renovation solutions and proposes a hybrid solution.Through comparison of transformation schemes and actual cases,this paper draws the following conclusions: 1)The heat consumption of urban and rural residential building envelopes is different.Urban buildings consume heat mainly on external walls,and rural buildings mainly on roofs.2)The financial net present value of the transformation schemes proposed in this paper is positive throughout the life cycle,and the schemes have high transformation value.3)According to the evaluation indicators,for urban buildings,the external wall renovation scheme has better technical applicability,and for rural buildings,the roof renovation scheme has better technical applicability.4)Compared with urban residential buildings,the unit cost of energy-saving retrofits for rural residential buildings can achieve higher retrofit returns.5)The environmental benefits obtained during the entire life cycle of the renovation project are far higher than the economic benefits,and become the main part of the incremental benefits.Therefore,the cost-benefit evaluation of the energy-saving renovation project should take environmental factors into account.This paper uses the life cycle theory to quantify the economic costs,environmental costs,economic benefits,and environmental benefits of the entire life cycle of an energysaving renovation project,and evaluates the incremental costs and incremental benefits of the project.This paper compares and analyzes the urban and rural residential building renovation schemes,and points out what needs to be focused on in energy-saving renovation projects,providing a reference for the large-scale implementation of energy-saving renovation.