中文摘要：

本文针对基于产品名义工况能效比确定的多联机作用域的不足,提出多联机季节经济性作用域的概念和基于空调系统的季节能效比（SEER）和全年性能系数（APF）的多联机季节经济性作用域的确定方法;对此阐述了基于实验数据的多联机和风冷式冷（热）水机组＋风机盘管空调系统的全工况性能模型的构建方法;以南京地区办公建筑为例,应用GB/T 18837《多联式空调（热泵）机组》（报批稿）给定的建筑负荷模型、制冷与制热季节各温度发生时间模型,计算分析了不同名义工况能效比（EER和COP）的多联机以SEER和APF为指标的季节经济性作用域。本文提出的多联机季节经济性作用域确定方法不仅为多联机工程设计规范的完善提供一种思路,而且也可指导具体工程的方案选择和设备选型。

英文摘要：

In view of the imperfection of present efficiency region of multi-split air conditioning system based on energy efficiency ratio at nominal working condition, a concept and a determination method of seasonal efficiency region of multi-split air conditioning system based on seasonal energy efficiency （SEER） and annual performance factor （APF） were proposed. The construction approaches of full condition performance models of multi-split air conditioning system and air-cooled water chiller ＆ heater unit plus fan-coil air conditioning system based on experimental data were illustrated. Using the building load model and air conditioning hours at various temperatures in cooling and heating season in GB/T 18837 （draft for approval）, the seasonal efficiency region of multi-split air conditioning system with different nominal energy efficiency ratio （ EER and COP） in office building in Nanjing was calculated as an application example. The proposed con- cept and determination method of seasonal efficiency region of multi-split air conditioning system can not only provide an option to improve the code for engineering design of multi-split air conditioning system, but also offer guidance for the selection of air conditioning system and equipment in a practical project.