摘要
基于移动边界法的思想,建立了螺旋管式蒸发器完整的移动边界模型及准稳态模型,编制了变工况动态仿真计算程序。以蒸发器进口水量阶跃变化为输入条件进行仿真计算,得出了蒸发器压力、出口温度、各相区长度等动态特性。计算结果验证了本研究算法的可行性。其中,准稳态法采用更少的变量,利于控制器的设计,数值计算更快。蒸发器存在3个相区时,采用移动边界法计算更为合理准确。
According to the idea given in the moving boundary method,established was an all-inclusive moving boundary method-based model and a quasi-steady-state model for spirally-coiled tube type evaporators and prepared was an off-design condition dynamic simulation and calculation program. With a stepped change in the water flow rate at the inlet of the evaporator serving as the input condition,a simulation calculation was performed and such dynamic characteristics of the evaporator as the pressure inside the evaporator,outlet temperature and lengths of various phase zones etc. were obtained. The calculation results verified that the calculation methods under discussion are feasible and stable. Among them,the quasi-steady-state method uses fewer variables,thus favorable to the design of controllers and quicker in numerical calculation. When three phase zones are present in the evaporator,to conduct a calculation by using the moving boundary method is more rational and accurate.
出处
《热能动力工程》
CAS
CSCD
北大核心
2016年第1期27-31,129,共5页
Journal of Engineering for Thermal Energy and Power
基金
国家自然科学基金资助项目(51409215)
关键词
螺旋管
蒸发器
动态仿真
spirally-coiled tube
evaporator
dynamic simulation
作者简介
白杰（1985-），男，山西阳泉人，西北工业大学博士研究生．
