Numerical Simulation and Performance Improvement of Spray Cooling for Rear Air Cooler of High-power Centrifugal Compressor
The direct cooling effect of fans is not up to standard when the rear air coolers of some compressors in the backbone pipe network of Sichuan and Chongqing are used in the high temperature environment in summer.Therefore,the method of adding a spray cooling system to assist the rear air cooler to accelerate heat dissipation is studied.The simulation model of the finned tube bundle in the rear air cooler is constructed by using ANSYS Workbench software.The flow field variation of the finned tube bundle in different spray cooling conditions is simulated.Based on the numerical simulation analysis results,the automatic control scheme for the rear air cooler spray cooling system is proposed.The results show that the spray volume can directly affect the heat transfer coefficient of the finned tube wall,and the cooling effect of the natural gas in the tube.The outlet natural gas temperature can be controlled by adjusting the spray volume,the smaller the diameter of the spray droplet,the better the evaporative heat absorption effect,but it will increase the equipment investment cost.The heat dissipa-tion effect of the finned tube bundle after adding the spray cooling device can meet the requirements of natural gas export in summer.The automatic control scheme of the spray cooling system can optimize the operation process of the equipment,and achieve energy saving and consumption reduction.
centrifugal compressorair coolerfinned tubespraynumerical simulationautomatic control
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