基于穷举搜索法的城市建筑CCHP系统优化配置

Optimal Configuration of Urban Building CCHP System Based on Exhaustive Search Method

冷-热-电三联供系统可实现能量的高效梯级利用,有利于实现“碳达峰、碳中和”。基于穷举搜索法构建了一套包含燃气热电联产系统、燃气锅炉、电制冷机、吸收式制冷机和水-水换热器的楼宇级冷-热-电三联供系统,并以北京3种典型的楼宇建筑为研究对象,研究了冷-热-电三联供系统在不同类型负荷下的容量配置、系统运行参数、经济性和减排情况并进行相应敏感性分析。结果表明:与分产系统相比,商业建筑、办公建筑、居住建筑的成本节约率分别为21.76%、16.72%和9.17%,二氧化碳减排率分别为15.80%、10.42%和4.41%,系统能源价格分别下降39.85%、49.04%和41.29%;研究结果可为冷-热-电三联供系统优化提供参考。

Combined cooling,heating and power(CCHP)system can realize efficient cascade utilization of energy,which was conducive to achieve the goal of"carbon peak and carbon neutrality".Based on the exhaustive search method,a building-level CCHP system was constructed including gas-fired cogeneration system,gas-fired boiler,electric chiller,absorption chiller and water-water heat exchanger.Taking three typical buildings as research objects,the capacity configuration,system operation parameters,economic performance and emission reduction of the CCHP system were studied and the corresponding sensitivity analysis was carried out.Results show that compared with their production systems,the cost saving rates of commercial buildings,office buildings and residential buildings are 21.76%,16.72% and 9.17%,the carbon dioxide emission reduction rates are 15.80%,10.42% and 4.41%,and the system energy prices are reduced by 39.85%,49.04% and 41.29%,respectively.The research results can provide a reference for the optimization of the CCHP system.