通过对现有空分装置预冷系统的流程和工艺参数的审查,发现冷却循环水的冷却能力未得到充分利用,导致部分冷却循环水空循环。进一步通过定量分析发现,现有的预冷系统热量非平衡,具有很大的操作弹性和节能降耗空间。据此,对预冷系统换热...通过对现有空分装置预冷系统的流程和工艺参数的审查,发现冷却循环水的冷却能力未得到充分利用,导致部分冷却循环水空循环。进一步通过定量分析发现,现有的预冷系统热量非平衡,具有很大的操作弹性和节能降耗空间。据此,对预冷系统换热网络进行流程重构,并进行了物料衡算和能量衡算。结果表明,与原流程相比,冷却水循环量降低了590 t/h,电耗降低了130 k W。展开更多
In the present study, the ice slurry refrigeration system with pre-cooling heat exchanger (ISSH) is studied experimentally to achieve the system performance, ice crystal formation time and the temperature of ice cryst...In the present study, the ice slurry refrigeration system with pre-cooling heat exchanger (ISSH) is studied experimentally to achieve the system performance, ice crystal formation time and the temperature of ice crystal formation. The operating parameters considered in this paper include the concentration of salt solution, suction pressure, discharge pressure and Energy Efficiency Ratio (EER). The result shows that the temperature of critical time of ice crystal formation decreases with the increasing concentration of salt solution and that the ice crystal formation time increases with the increasing concentration of salt solution. In the same concentration of salt solution, the ice crystal formation temperature of ISSH is lower than that of basic ice slurry refrigeration system (BISS), and the ice crystal formation time of ISSH is shorter than that of BISS. On the whole, the EER of ice slurry refrigeration system with pre-cooling heat exchanger is higher than that of basic ice slurry refrigeration system.展开更多
文摘通过对现有空分装置预冷系统的流程和工艺参数的审查,发现冷却循环水的冷却能力未得到充分利用,导致部分冷却循环水空循环。进一步通过定量分析发现,现有的预冷系统热量非平衡,具有很大的操作弹性和节能降耗空间。据此,对预冷系统换热网络进行流程重构,并进行了物料衡算和能量衡算。结果表明,与原流程相比,冷却水循环量降低了590 t/h,电耗降低了130 k W。
文摘In the present study, the ice slurry refrigeration system with pre-cooling heat exchanger (ISSH) is studied experimentally to achieve the system performance, ice crystal formation time and the temperature of ice crystal formation. The operating parameters considered in this paper include the concentration of salt solution, suction pressure, discharge pressure and Energy Efficiency Ratio (EER). The result shows that the temperature of critical time of ice crystal formation decreases with the increasing concentration of salt solution and that the ice crystal formation time increases with the increasing concentration of salt solution. In the same concentration of salt solution, the ice crystal formation temperature of ISSH is lower than that of basic ice slurry refrigeration system (BISS), and the ice crystal formation time of ISSH is shorter than that of BISS. On the whole, the EER of ice slurry refrigeration system with pre-cooling heat exchanger is higher than that of basic ice slurry refrigeration system.
