基于动态负荷的分布式能源系统优化配置

Optimization of Community Distributed Cogeneration System Configuration

在对建筑进行冷热负荷计算时,传统的负荷计算方法不能准确反映建筑冷热负荷的逐时变化情况。冷、热负荷的逐时数据影响着冷热电三联供系统设计原则的选择、方案的配置及相应的运行策略。为研究社区分布式联供系统的最佳设备容量,在分析建筑动态负荷的基础上综合考虑系统的成本节约、节能和环保性,确定了基于年度总成本节约率一次能源节能率和二氧化碳减排率三个评价指标的多目标评价指标。

In the calculation of the cooling and heating load of the building, the traditional load calculation method can not accurately reflect the changes of the building＇s cooling and heating load. The hourly data of cooling and heating load have an affect on the selection of distributed CCHP system design principle, the configuration of the scheme and the corresponding operation strategy. In order to study the optimal equipment capacity of community distributed system, on the basis of analyzing dynamic load of the buildings, taking the cost saving, energy saving and environmental protection of the system into consideration, based on the annual total cost savings Rate, primary energy saving rate and carbon dioxide emission reduction rate of the system, the multi - objective evaluation index is proposed. Take the multi-objective evaluation index as the optimization objective function, using the optimization algorithm to find the optimal capacity configuration and the corresponding operation strategy based on the load characteristics of the operation of the system. On this basis change the weight coefficient of each evaluation index, and analyze the influence of different evaluation index weight coefficients on the system capacity optimization and comprehensive performance.The results show that the distributed cogeneration system has better energy saving and environmental protection compared with the traditionalsystem that cooling , heating and electric are supplied separately.