The Study Of Characteristic Simulation With Distributed Energy System Basd On Coal-Bed Methane

The 21 st century is known as the era of large-scale development of coalbed methane.Tt is unlike that the development of natural gas,the development of coalbed methane can fundamentally prevent the occurrence of gas accidents,enhance the safety of coal mine production,increase clean energy,and make up for the shortcomings of insufficient natural gas supply.Become the most reliable alternative source of natural gas.However,both coalbed methane and natural gas are non-renewable resources,so it is particularly important to make full use of coalbed methane.In recent years,distributed energy systems have received wide attention from all walks of life because of their advantages of high power supply efficiency,high economic efficiency,more energy saving and environmental protection,and less land occupation.And as a cascade energy utilization system,the energy utilization rate can be increased to 75% to 85%,which has broad application prospects and is expected to replace the centralized energy system as the main force in the development of the energy industry.Based on this,this paper takes the establishment of distributed energy system based on coalbed methane as the research goal,and provides relevant theoretical and technical guidance for the integrated control system of the distributed energy system through the simulation analysis of the static characteristics of the energy system.The main contents of the study are as follows:(1)We use gas-fired internal combustion engine as the core of power,designed a set of dual-pressure waste heat boiler,steam turbine,single-effect lithium bromide absorption heat pump and other equipment as a whole based on coalbed methane distributed energy system,its rated power generation,heating capacity,The cooling capacity is: 800 k W,300 k W,129 k W.(2)Based on the modular modeling method,the equipment layout of the system is divided and modeled reasonably.First,the internal combustion engine is modeled by the average method,and the combustion and emission models are introduced at the same time.The change of the concentration of coalbed methane components can directly affect the relevant performance of the system.Therefore,we have established a waste heat boiler model for single-phase medium heat transfer and a waste heat boiler model for the evaporation system,and determined the flue gas according to the structure of the heat exchanger.Side and working side convection heat transfer coefficient.After that,the steam turbine is modeled by adding static characteristics to the dynamic first-order link.Finally,the steam type single-effect lithium bromide absorption heat pump was modeled by the lumped parameter method.(3)Finally,through the platform,static simulation test is carried out on the model of the whole system,and the simulation steady-state performance data is compared with the design value to explore the correctness,rationality and feasibility of the model.The results show that the static simulation model of the distributed energy system established in this work has high simulation precision and is beneficial to real-time simulation monitoring.Lay the foundation for its control system design.