Characteristic Research And Optimum Type Selection Of The Water Intake System Of River Water Source Heat Pump System

Water intake system is an important part of the river water source heat pumpsystem, stable operation of the river water source heat pump system depends on thereliability of the water, the initial investment and energy consumption of Water intakesystem accounts for considerable ratio in the initial investment and energy consumptionof river water source heat pump system, the optimal design and operation of waterintake system help to save the initial investment and operation cost. The study of thewater intake system research related to water level, water temperature, water quality,operating match of the pump, the operation of heat pump units and the cooling (heating)load regularity of refrigeration system, etc. Water intake engineering, involving inmult1-sciences and engineering such as water resource management, environmentalscience and water engineering, refrigeration, air conditioning, has very extensivecontents. So the study of water intake system research is a multidisciplinary field andmust be considered from the angle of system.Our previous studies of river water source heat pump water system focus on thestudy of river water level,water temperature,water quality, river water source heat pumpsystem model and its optimal operation, etc. In addition, less attention is paid to thestudy about the change of water supply to accommodate system requirements, andoptimal design method adapted to the optimize operation strategy. So it is necessary tostudy lectotype optimization that take the various regularity of river water, from theperspective of matching water source, water system selection match the operation of theheat pump units into consideration. After reviewing references, the following aspectsare thus studied in this dissertation:1) Analysis the river water temperature and water level of Changjiang river inChongqing, build a model that be used in data interpolation and short–term forecasting.2) Using time series analysis method x-11process, study on the segment trends,seasonal factors and irregular factors of water level and water temperature sequence inthe Yangtze River near Chongqing, revealing its characteristics and the basic trend ofthe monthly series.According to the time division and operation characteristics of riverwater source heat pump system refrigerate condition and heating condition, empiricalfrequency curve was used in analysis the river water level time series. 3) Comprehensive Analysis for performance changes of frequency converter,motors, pumps with frequency variation, and modelling water system energyconsumption with constant frequency and the frequency condition. Then summarizemain study of model of heatpump COP in transient, a model of heatpump COP intransient that take refrigerant circuit and compressors into consideration isproposed.this model consider the unstabl operation and provide a great precision.4) Operating condition analysis is basis for optimal design and operation of intakepumping stations. Influenced by the system configuration and control strategy,Operating condition is described by probability distribution across the river watertemperature, water level and cooling (heating) load.in addition,analysis the principlesof optimum coordination,based on the model of river heat pump enregy consumption,computer programs were wrote to analysis the water system enregy consumption,by theactual example verifies the feasibility of the computer programs.through the result fromthe computer programs,we can computer assurance rate,unstable working range,then italso can provide guidance for design and operation of intake pumping stations.