Development Of Design & Optimum Platform Of Distributed Energy Supply System Based On Micro Gas Turbine

China's energy consumption ranks first in the world and is mainly based on coal.Therefore,there is a lack of energy use and environmental pollution problems.Meanwhile,people are eager to improve the quality of life.The distributed energy supply technology?DES?based on micro gas turbine?MGT?which used natural gas as fuel,has clean energy,efficient use of energy,low emission characteristics,to achieve the purpose of adjusted energy structure and improved environment.In the paper,based on survey and research of domestic DES projects,through analysis of current domestic MGT-DES development,we found that overall existing DES performance is too low.Further improvement design and operational strategies is required to achieve overall optimization from design to operation,to improve overall performance on economy,energy saving and environmental protection.Based on commercial software Matlab platform,many analysis models were established such as micro gas turbine,lithium bromide chillers and waste heat boiler,etc.Micro gas turbine variable condition performance model were bulit by component characteristic curves.Baesd on system topology design method,MGT-DES design optimization platform were developed by selecting appropriate topology model,optimization variables,evaluation criteria?economic,energy,environmental?and using particle swarm optimization?PSO?.This platform provides the maximum overall performance by proposing a running strategy for a specific user.The MGT-DES design optimization platform was used for the typical hotel user.It sequentially provides solutions,such as MGT portfolio allocation,thermal ratio adjustment and mixed operation mode of series and parallel for the existing problems of short running time,seasonal fluctuations thermos-electric and low energy capacity.These solutions improved the system overall performance by 27.06%?34.56%?36.55%respectively.Meanwhile,the optimized MGT-DES system increased energy supply extended running time and reduced the numbers of start and stop process.The final design system's evaluation criteria including annual total cost saving ratio?ATCSR?,primary energy saving ratio?PESR?,carbon dioxide emission reduction ratio?CO₂ERR?,were increased by 24.11%,49.06%,and 40.64%,respectively.Overall performance optimization reached 36.55%.We have concluded the completed optimization process of design and operation.Through the MGT-DES design optimization platform,an 863demonstration project system of 30kW MGT-DES fueled with biogas was designed.The system's power,thermal efficiency and heat-electric ratio are30kW,75.7%and 1.63,respectively.Meanwhile,the influence of the biogas components,combustion efficiency and other parameters to the system performance was analyzed and a preliminary assessment for construction and operation of the system was conducted.