Research On The Integrated Design Of Building Roof And Solar Photovoltaic System Under Low Carbon Orientation

Along with the implementation of the"14th Five-Year Plan"of energy saving and emission reduction,photovoltaic application market grows rapidly.The combination of photovoltaic and building industry means that the construction industry moves from negative energy saving to positive capacity,and gradually enters the era of building energy saving and capacity simultaneously,which has important practical significance for national energy saving and emission reduction,environmental protection.At the same time,with the rapid development of photovoltaic industry,the integrated design of photovoltaic and building is becoming more and more common,among which,the integrated design of photovoltaic and building roof is the most common.However,at the present stage,the degree of photovoltaic integration is low,and there are few theoretical studies on the integrated design of photovoltaic roof.The research work on the efficiency of photovoltaic energy saving and carbon reduction also focuses on the power generation characteristics of photovoltaic,ignoring the impact of photovoltaic modules on the energy consumption of buildings in lighting,heat insulation and other aspects.Unreasonable design will not only affect the photovoltaic power generation,reduce the comprehensive carbon reduction benefit of photovoltaic buildings,but also cause adverse effects on the indoor environment of buildings.Therefore,to carry out research on the integration design of photovoltaic system and building roof and optimize the design parameters of photovoltaic roof from the perspective of low carbon can deepen the integration degree of photovoltaic system and building and optimize the carbon reduction benefit of photovoltaic roof,which has important reference significance for the development of national photovoltaic industry and the cause of energy conservation and carbon reduction.Firstly,this thesis expounds the significance of photovoltaic building integration,the form classification of photovoltaic system and the importance of photovoltaic building integration design by referring to relevant policies,standards and regulations.By investigating the application status of photovoltaic roof in various buildings at home and abroad,this thesis analyzes the application characteristics and existing problems of photovoltaic roof integration.Moreover,the research and analysis on the development status of photovoltaic integrated industry are carried out,which lays a solid foundation for the analysis of photovoltaic roof integrated design strategy and the optimization design research under the guidance of low carbon.Secondly,the design principle of PV integration and the influencing factors of PV system design are analyzed,and the selection design of PV module is discussed.By citing a large number of examples for demonstration and analysis,this thesis systematically expounds the approach and strategy of integrated design of photovoltaic module and building roof from three aspects of function,shape and style expression,and puts forward the design strategy in the layout design of inverters and other accessories.Thirdly,the integrated design optimization of building roof and solar photovoltaic system under the guidance of low carbon is discussed.In this study,the carbon reduction factors of photovoltaic roof were analyzed,and the analysis model was established by combining the simulation software Design Builder.The combination of single variable and multi-variable was carried out from the aspects of roof modeling factor,photovoltaic array factor and photovoltaic module factor respectively,and the energy consumption of buildings in different design schemes and the total carbon emissions in use stage were simulated.The photovoltaic design strategy and parameter combination are obtained when realizing the lowest carbon emission.At the same time,the concept of carbon emission sensitivity index is introduced,and the influence degree of single variable and multi-variable combination schemes in different design strategies on carbon emissions is ranked,and the differences of carbon reduction strategies are clearly pointed out.This thesis provides appropriate detailed design parameters for the application of PV roof integration form and related technologies under low carbon orientation for reference.Finally,taking the design of canteen and playground of an experimental primary school in Linyi City as an example,the above research results are applied to this project,and the integrated design optimization of photovoltaic roof is carried out for the case building according to the analysis results above.The CO₂simulation of the building before and after the optimization design of the project was compared.The results showed that the integrated design optimization of the roof and photovoltaic roof of the canteen and playground of an experimental primary school in Linyi City effectively reduced indoor energy consumption and building CO₂emissions.Therefore,the research results can provide reference for promoting the integration design of building roof and solar photovoltaic system under the guidance of low carbon.