基于全工况负荷特性冷热电联供系统柔性设计

为研究全工况负荷特性对冷热电联供系统经济性影响,以北京地区某办公建筑为设计对象,建立了冷热电联供系统模型和经济优化模型,得到热电比和冷电比对系统总费用年值的影响权重分别为48. 6%和51. 4%。同时,为解决系统静态设计工况与实际变负荷运行工况之间的矛盾,提出了一种冷热电联供系统柔性设计方法。将16种系统设备容量配置方案在北京地区典型工况下运行,得到最佳设计工况对应的热电比为1. 32,冷电比为1. 26。

Flexible Design of Combined Cooling, Heating and Power System Based on Load Characteristics at All Conditions

In order to study the influence of load characteristics at all conditions on the economy of combined cooling, heating and power (CCHP) systems, a system model and an economic optimization model were established for an office building in Beijing. The weights of the heat-to-power ratio and cooling-to-power ratio on the annual total cost of the system are 48.6% and 51.4%, respectively. Furthermore, a flexible design method of the CCHP system was proposed to match the static design and variable load operation conditions. A total of 16 sets of equipment capacity configuration schemes are operated under typical conditions of Beijing to obtain optimum design condition, including the heat-to-power ratio of 1.32 and the cooling-to-power ratio of 1.26.