低碳分布式综合能源系统的能值、经济和环境优化评价

Emergy,Economic and Environmental Optimization Evaluation of Low Carbon Distributed Integrated Energy System

为实现分布式综合能源系统(DIES)内部中低温余热高效利用以及系统可持续性评价,提出基于能值理论、经济和环境的计及余热回收的低碳DIES架构及其可持续评价方法。基于混合整数非线性规划方法,搭建了低碳DIES经济-环境的多目标优化模型,实现了分别以燃气轮机(GT)和固体氧化物燃料电池(SOFC)驱动DIES的容量配置及运行优化。结果表明:在考虑市场氢气碳排放条件下,SOFC驱动DIES方案的年总成本相比GT驱动DIES方案增加79.8%,但CO_(2)排放量减少43.3%;SOFC方案的能值可持续性指数为0.43,低于GT方案的能值可持续性指数(1.29)。

In order to realize the efficient utilization of medium and low temperature waste heat and the sustainability evaluation of distributed integrated energy system(DIES),the architecture and sustainability evaluation method of a low carbon DIES considering waste heat recovery were proposed based on emergy theory,economy and environment.Based on the mixed integer nonlinear programming method,the economy-environment multi-objective optimization model of low carbon DIES was established,and the capacity configuration and operation optimization of DIES driven by gas turbine(GT)and solid oxide fuel cell(SOFC)were realized respectively.Results show that under the condition of considering market hydrogen carbon emissions,the total annual cost of the DIES driven by SOFC is increased by 79.8%compared with that driven by GT,but the CO_(2)emission is reduced by 43.3%.The emergy sustainability index of SOFC driving DIES scheme is 0.43,which is lower than that of GT driving DIES scheme(1.29).