区域供冷系统冷却水管路水力仿真优化
Hydraulic simulation and optimization of cooling watercircuit of district cooling systems
摘要：
建立了区域供冷系统冷却水管路精细化水力仿真模型,采用理论分析与实验相结合的方法,对深圳前海10号制冷站1期冷却水系统设计与运行数据进行了分析。实验校核结果表明,采用本文仿真模型能较精确地计算整个管路系统及分段管路压降,可以较为精确地预测冷却水管路水力学现象,并用于工程分析。利用仿真模型得到了管路所有管件的阻力及各个管件的机械功耗,提出了高效机房管路减阻优化方法。与传统设计计算模型的对比发现,传统水力计算中90°弯头、三通等管件的局部阻力系数取值偏大导致管路水泵扬程计算结果与实际值有较大偏差。
Abstract：
A detailed hydraulic simulation model is developed for the cooling water circuit of district cooling system (DCS), and the design and operation data of Qianhai DCS plant No. 10 phase 1 in Shenzhen are analysed by combining theoretical and experimental analysis. The experimental results show that the simulation model can accurately calculate the pressure drops of the whole pipeline system and the segmented pipeline, and can accurately predict the hydraulic phenomenon of the cooling water pipeline, which can be used for engineering analysis. The simulation model is used to obtain the resistance of all pipe fittings and the mechanical power consumption of each pipe fitting, and a drag reduction optimization method of the high efficiency chiller plant pipelines is proposed. The comparison with the traditional design calculation model shows that the local resistance coefficient of 90°elbow,tee and other pipe fittings in the traditional hydraulic calculation is too large, which leads to a large deviation between the calculation result of the pump head of the pipeline and the actual value.
Keywords:district cooling system; hydraulic simulation model; experimental validation; pressure drop distribution; power consumption distribution; high efficiency chiller plant; drag reduction optimization