Research On Optimal Configuration And Operation Of CCHP Considering Multiple Thermal Energy Utilization

Facing the severe energy situation and evolution trend,upgrading the energy supply and energy consumption model and promoting the sustainable use of renewable energy are the core requirements for improving the energy utilization rate of the system,and a key step in achieving the sustainable development strategy.Excavating output units with controllability and heat utilization potential has become one of the ideas to solve the above problems,in order to further improve the energy utilization rate of integrated energy systems.Most energy supply units are simply limited to the input and output angles,and the waste heat during high temperature and exothermic reactions has not been fully paid attention,resulting in increased heat emissions and decreased energy utilization.Therefore,in view of the problem of insufficient utilization of renewable energy and resource utilization,this paper proposes an optimal configuration model of a combined heat and cold power supply system that includes multiple heat utilization of methanation devices and solid oxide fuel cells.The research on the determination of the capacity is carried out.On the basis of the model,the CSP unit is further introduced,and the optimization operation of the system where it is located is analyzed.The main work contents are as follows:First of all,the specific structure of CCHP considering multiple heat utilization is given,including multiple heat utilization units and CCHP units.The thermal energy utilization characteristics and advantages of each equipment in the multiple thermal energy utilization unit are expounded,and models are established for the above units.Then,an optimal configuration model of CCHP considering multiple heat energy utilization is proposed,and the influence of the combined operation mode of the CCHP unit on the overall operating cost of the system is analyzed.Through simulation calculations,the optimal configuration of the capacity of each output unit of the system was studied in depth to verify the feasibility of the model.The impact of multiple thermal energy units on the overall cost,the impact of different energy prices on capacity allocation,and the impact of unit operating costs on the capacity planning of heat storagedevices are compared and analyzed.Finally,in order to further improve the utilization rate of renewable energy and analyze the operation of the system,a multi-heat energy utilization CCHP model containing CSP unit is proposed and its optimized operation is launched analysis.And the operation mechanism and existing advantages of the CSP unit are described,and the equipment model of the CSP unit is established.Based on the minimum day-to-day operating costs of the system,combined with the particle swarm optimization algorithm to analyze the system's power,thermal and cold operating conditions.Through simulation,the rationality of the current cost of the system with CSP units and the given capacity of CSP units are analyzed,and the power supply characteristics of CSP units and their impact on battery power are studied.