分布式冷热电联供系统优化运行方法

摘要

对能源站改造前、后的冷热电联供系统进行详细分析,并建立改造后系统(包括:燃气轮机、余热锅炉、蒸汽轮机、辅助锅炉、热交换器、吸收式制冷机、热泵和电制冷机)的数学模型;以运行总成本最低作为单目标函数,以能源节约率和二氧化碳减排率综合指标最大作为多目标函数,运用LINGO软件对混合型整数非线性规划优化模型求解,并分析对比优化结果.分析结果表明:若以降低成本为前提,则能源消耗和二氧化碳排放量增大;若以降低能耗和保护环境为前提,则会相对增加运行成本.%The combined cooling heating and power (CCHP) system was analyzed in detail in this paper.Mathematical models of retrofitted CCHP system were set up,including:gas turbine,boiler,steam turbine,auxiliary boiler,heat exchanger,absorption chiller,heat pump and electric refrigerator.And the lowest running cost was taken as single objective function,and the highest energy economic ratio together with CO2 reduction rate was taken as multi-objective function.This optimization model was formulated as typically mixed integer nonlinear programming (MINLP) problem.LINGO was used to solve this model and the optimization results were analyzed.The results show that,if taking reducing rmning cost as preeondition,energy consumption and carbon dioxide emissions are increasing,and if taking reducing energy consumption and protecting the environment as precondition,operating costs will be increased.