基于全生命周期评价中深层水热型地热供暖系统碳排放研究OA

In order to clarify the carbon footprint characteristics of the medium to deep water thermal geothermal heating system and propose emission reduction paths,the Hancheng Energy No.3 Station is taken as the research object,focusing on the mining and irrigation well group link,and constructing a three-level physical model of'basic support-core design-guarantee optimization'and a full life cycle carbon emission calculation model.The model covers carbon emission calculations for four stages:Material production and transportation,construction,operation,demolition and recycling,and proposes emission reduction strategies for high carbon emission nodes.The results show that the total carbon emissions throughout the full life cycle of the system are 93 000.49 tCO2,and the carbon emission intensity per unit area is 294.22 kg CO2/m2.Among them,the operating phase is the core emission source,accounting for 89.47%.The carbon emissions during the early physical and chemical stage of the irrigation well group are 2 098.81 tCO2,accounting for 19.25%of the total emissions during the early stage of the system.The carbon emissions during the construction stage accounted for as high as 81.55%.The research results and strategies can provide technical references for the low-carbon development of medium to deep water thermal geothermal heating systems.