基于㶲评估的多能流节能调度

Energy-saving Scheduling of Multi-energy Flow Based on Exergy Evaluation

多能流系统可以实现能源的整体规划、多能互补和梯级利用,提高能源利用率。在此背景下,构建冷、热、电多能流系统模型,并引入压缩空气消纳风电,平衡能量。以热力学第二定律的“㶲分析”方法评估系统的节能指标,确定多能流系统的最节能调度方法。以某园区冬夏季节的典型风电出力和冷、热、电需求为例,采用模拟退火算法进行系统的节能调度并计算系统㶲效率。对系统是否使用先进绝热压缩空气对系统节能性的影响进行对比研究。研究结果表明,系统采用㶲评估节能指标,在具有先进绝热压缩空气时㶲效率更高,约为38%~58%。

Multi-energy flow system can realize the overall energy planning,multi-energy complementation and cascade utilization,and improve the energy utilization rate.In such a circumstance,a multi-energy flow system model of cooling,heating and power is established in this paper.Advanced adiabatic compressed air energy storage system(AA-CAES)is employed to balance the wind power and electrical power demand.Exergy analysis method of the second law of thermodynamics is used to evaluate the energy-saving index of the system to determine the most energy saving scheduling method for the multi-energy flow system.Taking typical wind power generation and cooling,heating and electricity demand of a park in winter and summer season as an example,simulated annealing arithmetic is adopted to carry out energy-saving scheduling of the system and exergy efficiency of the system is calculated.This paper makes a comparative study on the influence of advanced adiabatic compressed air on the energy-saving of the system.The results show that the system uses exergy efficiency to evaluate energy-saving index,and the efficiency is higher when the system has advanced adiabatic compressed air,which is about 38%~58%.