The area of ​​public buildings in China accounts for 13.6% of the total area of ​​buildings, while the energy consumption ratio is as high as 21.7%. Commercial buildings, as typical public buildings, have enormous potential for energy conservation. At the same time, commercial buildings have large fluctuations in load. In order to achieve stable operation of local power grids, energy storage systems are also required as load balancing equipment. Institute of Engineering Thermophysics, Chinese Academy of Sciences Research Institute of Energy Storage R&D Center takes the comprehensive building of the institute as the research object, uses the electricity logger to measure and track its electricity load within 1 year, and combines the peaking ratio with 16% and meets the energy release of 2 hours. Requirements, select a typical battery energy storage technology, and on this basis to carry out technical economic and social benefits analysis. Traditional techno-economic evaluation models generally only consider static or dynamic evaluation indicators such as net present value (NVP), internal rate of return (IRR), or static investment payback period (IPP), and less comprehensively consider the changes and calculations. The impact factors considered when evaluating indicators need to be improved; and for social benefits, previous studies have paid more attention to environmental benefits or CO2 emission reduction benefits, and there is a lack of quantification of emission reductions for other pollutants and auxiliary benefits of energy storage systems to the grid. Calculation model. In view of this, based on the current national conditions, the R&D center of storage energy seeks to propose a more comprehensive assessment model for technical and economic performance. At the same time, it also proposes more comprehensive social benefits on the basis of consideration of the quantitative benefits and the reduction of CO2 and other pollutants. Evaluate the model to provide reference for subsequent studies. The research results show that the maximum load of the comprehensive building of the institute can reach 30.8 kW, the minimum load is 8.8 kW, and the average annual load is 18.7 kW. In order to meet the power load demand, a battery energy storage system with a power rating of 5.15kW-6.5kW and a capacity of 10.4-12.7kWh is used. Based on the new model of economic evaluation, taking 30 years as the calculation period, the maximum net present value and internal rate of return of the comprehensive building can reach 2577.1 $ and 28.1%, respectively, and the minimum value of the static investment payback period is 6.2 years. At the same time, through sensitivity analysis, the study found that the discount rate, the annual increase rate of equipment costs, and purchase subsidies all have an impact on the economic indicators of energy storage systems, among which the discount rate has the greatest impact. In addition, based on the new model of social benefits, with the exception of CO2, CO, SO2, and NOx emission reductions for buildings are 3.6 kg, 12.5 kg, and 2.1 kg, respectively, and the emission reduction benefits are even more pronounced and more persuasive. The project was supported by the Beijing Municipal Natural Science Foundation, the National Natural Science Foundation of China, and the National “863†Program. The relevant scientific research results have been published in the journal Energy Conversion and Management. Suzhou Newstar Hardware Co.,Ltd is China manufacture and supplier of Socket Spanner Set, Socket Spanners and we are specialized in T Bar Socket Spanner, Spanner Socket Tool Set and other kinds of Tool Kits. We have more than 400 different modules of tool kits which you could choose from. And also we have strong ability of OEM and ODM services, could make different modules based on customer design, and customized logo, colors, etc. Welcome your visit. Socket Spanner Set,Socket Spanners,T Bar Socket Spanner Set,Spanner Socket Tool SUZHOU NEWSTAR HARDWARE CO.,LTD. , https://www.newstarhardware.com
Advances in research on building energy storage systems for engineering thermophysics