蒸汽型双效吸收式冷水机组部分负荷性能

为了分析蒸汽型双效溴化锂吸收式冷水机组部分负荷工况性能，建立了机组非线性耦合数学模型．由于该模型变量多，溶液温度、浓度取值范围相互制约，采用子空间置信域法进行求解．通过机组部分负荷工况性能测试试验，验证了模型的正确性．最后模拟分析了4种运行模式下机组部分负荷工况的蒸汽耗量、机组性能系数（COP）和综合部分负荷性能系数（IPLV）．结果表明以冷水入口温度为控制信号，变溶液循环量的运行模式下机组性能最好，比定溶液循环量调节运行模式可节省约20％的能耗量．

Part Load Performance of Double Effect Steam Operated Absorption Chiller

A non-linear coupled numerical model of double effect steam operated LiBr-H20 absorption chiller was introduced to evaluate its part load performance. Due to its complexity and mutual restraint between solution tempera ture and concentration range, the model was solved using the subspace trust region method. Then a test rig was estab lished for validation of the simulation model, and the accuracy of the predictions was confirmed by the good agree ment with experimental data. Finally the steam consumption, coefficient of performance （COP） and integrated part load value （IPLV） of the absorption chiller were analyzed in four different operational modes. Results show that sys tem performance of absorption chiller is the best when chilled water inlet temperature keeps constant and solution flow varies as the cooling load varies, and about 20% of energy consumption is reduced compared to that in the mode of constant solution flow.