Because the surfacewater in upper region of the Yangtze River contains large amounts of silt and algae, high content of microorganisms and suspended solids, it can not be directly used as circulating cooling water in the river water source heat pump unit. In order to solve the problem, the water temperature and quality of Yangtze River in Chongqing area were analyzed, the principle of application of water to prevent clogging of the filter device was introduced, and the performance of clean up and anti-clogging of device was tested through experiment. The experimental results show that the river sediment can be reduced to 100 g/m3 after filtration,with an average removal rate of 68.5%,and suspended solids and algae levels also decreased to 50-100 NTU basically, with its average removal rate is 73.1%, which can meet the requirements of water quality into heat pump unit directly. The load impedance of pipe lines matches the characteristic impedance, and the water hammer pressure amplitude is small. It can resolve the key technical problems of clean up, anticlogging and anti water hammer when the surface water runs into the heat pump in the upper Yangtze River region. The entire separation system is simple, easy installation, reliable operation, low operation cost, and can be automatic cleaning, filtering and sewage residue automatic draining using the water flow and gravity, so it has great application prospects in the surface water source heat pump system in the Yangtze River region.
TONG Ming-Wei, Qin-Zeng-Hu. Experiment on filtration characteristics and water quality of Yangtze River water into heat pump unit[J]. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(2): 104-108.
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