以制冷量非均匀匹配的冷水机组群为研究对象，考虑制冷量自平衡特性，构建多 台冷水机组并联运行热力特性模型，研究变负荷下的非均匀负荷匹配冷水机组并联运行 特性，提出了基于能效基准的多台冷水机组控制策略，并与均匀负荷匹配冷水机组进行了 对比分析，讨论了变冷冻水出水温度条件下非均匀负荷匹配控制策略的适用性． 结果表 明:在制冷量自平衡条件下，多台冷水机组并联运行时存在能效基准，冷水机组群按照能 效基准所对应的控制策略运行可实现能效比最大化，本算例中的空调系统负荷率分别在 14% ～39%、43% ～ 100% 范围内变化时，冷水机组群平均能效比 EER≥5，最大 EER达 5． 43;在变冷冻水供水温度运行条件下，冷水机组控制策略不随冷冻水出水温度改变而改 变，具有良好的适用性;在实际工程中进行冷水机组选型搭配时，以较少的冷水机组并联 运行台数实现较高总体运行性能运行的非均匀负荷匹配方式应优先考虑．

Taking the chiller group with non-uniform cooling capacity as the research object，considering the self- balancing characteristics of cooling capacity，the thermal model of parallel operation of multiple chillers was con- structed，and the parallel operation characteristics of non-uniform load matching chillers under variable load were studied． The optimal control strategy of chiller of the energy efficiency benchmark was compared with the uniform load matching chiller． The applicability of the non-uniform load matching control strategy under the chilled water effluent temperature was discussed． The results show that under the condition of self-balance of cooling capacity， there are energy efficiency benchmarks when multiple chillers are operated in parallel，and the chiller group can achieve the maximum energy efficiency ratio according to the control strategy corresponding to the energy efficiency benchmark． When the load rate of the air conditioning system in this example varies from 14% to 39% and from 43% to 100%，the average energy efficiency ratio of the chiller group is EER≥ 5，and the maximum EER is 5. 43; under the operating conditions of variable chilled water supply temperature，the control strategy of chiller does not change with the effluent temperature of chilled water，and has good applicability; when the chiller selec- tion and matching are carried out in the actual project，the non-uniform load matching method with a small number of chillers operating in parallel to achieve higher overall operating performance should be prioritized．