大型建筑群复合式热泵供热供冷技术研究及规模化应用

Research and Application of Hybrid Heat Pump Heating and Cooling Technology for Large-scale Buildings Complex

建筑供热供冷是社会各界高度关注的民生工程,热泵是将热能从低品位提升到高品位的高效低碳供能方式,也是国际建筑领域实现碳中和的重要途径。本项目针对大型建筑群复合式热泵供热供冷系统存在总冷热负荷动态预测方法缺失、规划设计体系不完备、系统运行能效低、关键技术和产品不配套、规模化推广难度大等问题,以提升复合式热泵系统能效、有效推进规模化应用为目标,系统性地开展了“负荷预测-优化设计-智慧运行-关键产品-标准推广”的全链条创新工作:提出了基于建筑特征、用户需求的大型建筑群供热供冷系统总负荷动态预测方法,开发了冷热动态负荷特征因子数据库和建筑群负荷集合寻优工具;提出了一种多场景复合式热泵系统能源总线架构理论,建立了仿真平台及综合评价体系,形成了系统容量弹性配置方法;建立了数字孪生复合式热泵系统模型,提出分层控制架构和预测方法,建立了智慧优化运行控制体系;研发了大型复合式热泵系统的关键技术和成套产品;制定了相关工程标准。相关研究成果实现了规模化稳定高效利用可再生能源供热供冷的技术突破,对推进建筑用能方式变革和实现建筑领域国家双碳战略起到重要支撑作用。

Building heating and cooling is a livelihood project highly concerned by all sectors of society.Heat pump is an efficient and low-carbon energy supply way to improve heat energy from low grade to high grade,which is also an important way to achieve carbon neutral in the international building field.For the hybrid heat pump in the large-scale buildings complex,there are some existing problems such as the lack of dynamic prediction method for the total cooling and heating load,incomplete planning and designing systems,low energy efficiency of system operation,mismatch of key technologies and product and the difficulty of large-scale promotion.The objectives of this project are improving the efficiency of the hybrid heat pump systems and promoting its application in large scale.The project systematically carries out innovation work along the chain of‘load prediction-optimised design-intelligent operation-key products-standard promotion’.A dynamic prediction method for the total load of heating and cooling system in large-scale buildings complex based on building characteristics and user needs is proposed,the database of characteristic factors of dynamic heating and cooling load and the optimization tool of buildings complex load collection are developed.An energy framework theory of multi-scenarios compound heat pump system is proposed,the simulation platform and comprehensive evaluation system are established,and the elastic configuration method of system capacity is formed.The digital twin compound heat pump system model is established,the hierarchical control structure and prediction method are proposed,and so as the intelligent optimal operation control system.The key technologies and complete sets of products of large-scale building complex heat pump system have been developed,and relevant engineering standards have been formulated.Relevant research results have achieved technical breakthroughs in the large-scale,stable and efficient use of renewable energy for heating and cooling,which plays an important supporting role in promoting the reform of building energy use mode and realizing the national Dual Carbon Strategy in the construction field.