CAJ | 학술논문

为实现在冷水机组结构参数缺乏的条件下，对冷水机组变流量工况下的性能进行准确预测，提出了一种将冷水机组未知结构参数集总并基于少量机组实测数据获取模型参数的建模方法，建立了相应的冷水机组变流量性能预测模型．通过搭建冷水机组变流量实验装置并进行实验，获得其模型参数并对机组变流量性能进行了模拟与实验对比．结果表明：该建模方法的模型参数获取简便，模型性能预测精度较高，制冷量、COP等系统性能参数偏差在10％以内，能较好地表征冷水机组变流量工况下的性能变化规律．冷冻水流量从额定流量的100％降至42．8％时，冷水机组制冷量减小8．6％，COP减小8．8％；冷却水流量从额定流量的100％降至24．2％时，冷水机组制冷量减小1．8％，COP减小14．8％，可为空调系统的变流量优化运行提供指导．
위실현재랭수궤조결구삼수결핍적조건하，대랭수궤조변류량공황하적성능진행준학예측，제출료일충장랭수궤조미지결구삼수집총병기우소량궤조실측수거획취모형삼수적건모방법，건립료상응적랭수궤조변류량성능예측모형．통과탑건랭수궤조변류량실험장치병진행실험，획득기모형삼수병대궤조변류량성능진행료모의여실험대비．결과표명：해건모방법적모형삼수획취간편，모형성능예측정도교고，제랭량、COP등계통성능삼수편차재10％이내，능교호지표정랭수궤조변류량공황하적성능변화규률．냉동수류량종액정류량적100％강지42．8％시，랭수궤조제랭량감소8．6％，COP감소8．8％；냉각수류량종액정류량적100％강지24．2％시，랭수궤조제랭량감소1．8％，COP감소14．8％，가위공조계통적변류량우화운행제공지도．
To simulate existing chiller with variable water flow accurately under the condition of con-figuration parameter absence,a modeling method which makes unknown parameters lumped and ob-tains model parameters based on measured data of chiller is proposed.A performance prediction model for chiller with variable water flow is developed,and an experimental device is built up to ob-tain the parameters of the model and make a comparison on the performance of chiller between simu-lation and experiment.The results show that by this modeling method,the parameters of the model are easy to gain,and the performance prediction accuracy of the model is high.The relative errors of performance parameters such as cooling capacity and COP (coefficient of performance)between simulation and experiment are within 10%,and the variation of the performance of chiller with varia-ble water flow can be represented accurately.When chilled water flow decreases from 100%to 42.8%of the rated flow rate,cooling capacity decreases 8.6%and COP decreases 8.8%.When cooling wa-ter flow decreases from 100%to 24.2%of the rated flow rate,cooling capacity decreases 1 .8%and COP decreases 14.8%.The results can provide evidence for the optimal operation of chiller.