At present, large centrifugal compressors are widely used in domestic petrochemical plants. This paper describes the control status of compressor control system in domestic petrochemical plants, the optimization schem...At present, large centrifugal compressors are widely used in domestic petrochemical plants. This paper describes the control status of compressor control system in domestic petrochemical plants, the optimization scheme to realize energy-saving control and the economic benefits brought to enterprises after control optimization.展开更多
The performances of a refrigeration unit relying on compressors working in parallel have been investigated considering the influence of the compressor volumetric efficiency and isentropic efficiency on the compression...The performances of a refrigeration unit relying on compressors working in parallel have been investigated considering the influence of the compressor volumetric efficiency and isentropic efficiency on the compression ratio.Moreover,the following influential factors have been taken into account:evaporation temperature,condensation temperature and compressor suction-exhaust pressure ratio for different opening conditions of the compressor.The following quantities have been selected as the unit performance measurement indicators:refrigeration capacity,energy efficiency ratio(COP),compressor power consumption,and refrigerant flow rate.The experimental results indicate that the system refrigeration capacity and COP decrease with a decrease in evaporation temperature,increase of condensation temperature,and increase in pressure ratio.The refrigerant flow rate increases with the increase in evaporation temperature,decrease in condensing temperature and increase in pressure ratio.The compressor power consumption increases with the increase in condensing temperature and increase in pressure ratio,but is not significantly affected by the evaporation temperature.展开更多
在矿用空压机组智能巡检机器人中,传统算法用于智能巡检机器人路径规划时,面对复杂矿井环境存在寻优速度慢、易陷入局部最优解等问题。为提升巡检效率和精度,提出了改进的蝙蝠算法(Improved Bat Algorithm,IBA)。首先,采用均匀初始化策...在矿用空压机组智能巡检机器人中,传统算法用于智能巡检机器人路径规划时,面对复杂矿井环境存在寻优速度慢、易陷入局部最优解等问题。为提升巡检效率和精度,提出了改进的蝙蝠算法(Improved Bat Algorithm,IBA)。首先,采用均匀初始化策略确保初始位置能广泛覆盖决策空间;其次,在迭代更新过程中,引入黄金正弦算子对在适应度评价中表现优异的蝙蝠个体进行优化更新,同时运用种群平均位置引导部分个体,在缩小搜索范围的同时维持较快收敛速度;最后在全局搜索阶段引入动态惯性权重系数,并采用单维与全维相结合的搜索策略。试验表明:IBA算法在5维条件下,Sphere函数测试中的收敛迭代次数仅20次,远少于蝙蝠算法(Bat Algorithm,BA),50维条件下同样表现出色;在机器人路径规划效果上,IBA算法规划路径长度比BA、自适应蝙蝠算法(Adaptive BA,ABA)和全局混沌蝙蝠算法(Global Chaos BA,GCBA)规划的路径更短,且在多个场景中转折点数量更少、收敛迭代次数更少、适应度值更低。研究反映出,基于IBA算法的智能巡检机器人路径规划方法可使矿用空压机组巡检效率提升45.9%,故障检测准确率提高至98.9%。所提算法有助于实现矿用空压机组智能巡检机器人路径高效规划,助力矿山安全生产。展开更多
文摘At present, large centrifugal compressors are widely used in domestic petrochemical plants. This paper describes the control status of compressor control system in domestic petrochemical plants, the optimization scheme to realize energy-saving control and the economic benefits brought to enterprises after control optimization.
基金supported by the National Natural Science Foundation of China(No.41877251)the Key project of Natural Science Foundation of Tianjin City(No.6JCZDJC39000).
文摘The performances of a refrigeration unit relying on compressors working in parallel have been investigated considering the influence of the compressor volumetric efficiency and isentropic efficiency on the compression ratio.Moreover,the following influential factors have been taken into account:evaporation temperature,condensation temperature and compressor suction-exhaust pressure ratio for different opening conditions of the compressor.The following quantities have been selected as the unit performance measurement indicators:refrigeration capacity,energy efficiency ratio(COP),compressor power consumption,and refrigerant flow rate.The experimental results indicate that the system refrigeration capacity and COP decrease with a decrease in evaporation temperature,increase of condensation temperature,and increase in pressure ratio.The refrigerant flow rate increases with the increase in evaporation temperature,decrease in condensing temperature and increase in pressure ratio.The compressor power consumption increases with the increase in condensing temperature and increase in pressure ratio,but is not significantly affected by the evaporation temperature.
