大型 CBD 复合供能系统运行策略优化及经济性分析

摘要

Analyses the natural conditions to use the composite energy system of gas-fired CCHP and river water source heat pump for district heating and cooling in Chongqing CBD Headquarter Economic Zone.Combining the dynamic heating and cooling load with the configuration of the cold and heat source units,determines the priority of opening order for the units and the optimal operation strategy of cold and heat source systems,and obtains the energy consumption of the composite system,based on the principles of the unit operation with the economic costs of lowest exergy preferentially,the unit operating at high load ratio,and without afterburning of the flue gas for apsorption water chiller,etc.Analyses the variation law for the break-even point of the cooling and heating price and its sensitivity when the resource price varies from 90% to 130%.%分析了重庆市 CBD 总部经济区采用冷热电联供和江水源热泵复合供能系统进行区域供能的自然条件，结合项目动态冷热负荷和系统冷热源机组配置情况，根据机组经济成本最低优先开启、机组高负荷率运行和吸收式机组尽量避免补燃等原则，确定了机组的优先开启顺序和冷热源系统的运行策略，得出了复合系统的能耗。分析了能源价格在一定幅度（90％～130％）内变化时冷热量价格盈亏平衡点的变化规律及其敏感性。