江水源热泵换热器污垢形成的关键水质因素分析

Key factors of water quality affecting fouling of the river water source pump heat exchanger

江水引起的热泵换热器结垢不仅会增大机组进出口阻力,还会导致换热器的换热效率下降。江水水质对换热器污染起决定作用。江水源热泵污垢形成的关键水质因素及相关性分析是热泵用水体评价和水处理决策的基础。通过对重庆地区长江和嘉陵江水质测试分析,并与现行允许水质指标的对比,表明含沙量和浊度是江水源热泵的重点解决问题。对江水源热泵换热器污垢的成份分析则表明,污垢是以小粒径泥沙的颗粒污垢为主。从而确定关键水质因素是含沙量和浊度。根据与实际江水泥沙配置保持一致的自配水样分析,得到了含沙量与浊度的关系方程,误差分析表明预测值与实测值能较好地吻合。

Fouling on heat exchanger of water source heat pump will not only increase resistance of import and export of the units,but also will cause efficiency of the heat exchanger to drop.River water quality plays a decisive role in polluting heat exchanger.The key of water quality factor to the formation of fouling on river water source heat pump and correlation analysis is foundation of water treatment evaluation and decision-making.Annual water quality testing and analysis in the Yangtze River and Jialing River in Chongqing area have been done.With the current allowing the water quality index contrast,comparison shows that the sediment concentration and turbidity is the key to solve the problem of river water source heat pump.Studies have shown that fouling of water source heat pump exchanger are mainly particulate fouling.Main ingredients are small particle size of sediment.Therefore,the sediment concentration and turbidity are identified to be the key factors of quality.For river sediment in accordance with the actual configuration consistent with the analysis of water samples,relationship between sediment concentration and turbidity equation has been obtained.And error analysis shows that predicted and measured values can be well fit.