基于实测数据并联变频水泵运行优化

为了有效降低地源热泵空调系统循环水泵的能耗，通过输配侧水泵参数拟合其单台特性曲线后利用相似原理得到多台水泵并联的性能特性并与实测数据对比验证，通过界限频率法对输配侧水泵的运行台数及频率进行优化研究，在满足扬程需求及流量需求的前提下得到优化后的水泵台数及频率，并提出频率浮动半径，为变工况的水泵运行提出量化的运行策略。结果表明：地源侧总流量在单台水泵额定流量的100%~136%和181%~193%范围内宜分别用2台和3台水泵，且优化后的节能率分别约为31.61%和19.56%；空调侧总流量单台水泵额定流量的230%~260% 范围内宜用3台水泵，且优化后水泵节能率约为12.82% 。可见优化效果明显。

Operation optimization of variable speed parallel water pumps based on measured data

In order to effectively reduce the energy consumption of the circulating water pump of the ground source heat pump air conditioning system, the performance characteristics of multiple pumps in parallel were obtained by fitting the single characteristic curve of the water pump of the transmission and distribution side and using the similar principle and verified by comparison with the measured data. Optimize the research on the number and frequency of the pumps on the transmission and distribution side, obtain the optimized number and frequency of pumps on the premise of meeting the requirements of the head and flow, and propose the frequency floating radius to propose the quantitative operation for the pumps of variable conditions Strategy. The results show that the total flow of the ground source side should be 2 and 3 pumps within the range of 100% ~136% and 181% ~193% of the rated flow of a single pump, respectively, and the optimized energy saving rate is about 31.61% and 19.56%; 3 pumps should be used within the range of 230%~260% of the rated flow rate of the single pump on the air conditioning side, and the optimized pump energy saving rate is about 12.82%. It is concluded that the optimization effect is obvious.