摘要
深入分析蒸汽在管网输送过程中的能量损失特征,将功损失、热损失加以区分,在此基础上构建能耗损失的计算模型,获得蒸汽管网经济流速并分析温度、压力、保温层厚度等不同因素下蒸汽管道能耗损失及经济流速的变化规律,为蒸汽管网运行评价与优化改造提供依据,并结合实际案例介绍运行评价技术的应用效果。结果表明:蒸汽散热损失受蒸汽流速、保温层厚度双重因素影响;蒸汽管网的经济流随着蒸汽操作压力的提高而降低、随着蒸汽温度的升高而增大;在相同操作流速下蒸汽温度越高能量损失越大、蒸汽压力越低能量损失越大。工程应用表明,在蒸汽管网运行评价的基础上进行蒸汽管网结构或操作优化,可有效降低输送环节的能量损失,获得显著的经济效益。
The steam＇s energy loss characteristic in pipe-network transportation was analyzed in depth. According to its different characteristics, the energy loss could be differentiated into power loss and heat loss. Then an energy loss model was built based on the two types. With this model, the energy loss and economical flow rate change rules were analyzed under different temperature, pressure and thermal insulation layer thickness. Those analyses found the basis for the pipe-network＇s operation evaluation and optimization. Finally the operation evaluation technology＇s method was introduced with actual case. The resultshows that the steam＇s heat loss was influenced by both flow rate and thermal insulation layer thickness. The steam pipe network＇s economical flow rate decreases with increasing operation pressure or decreasing steam temperature, i.e., the energyloss would be higher with higher steam temperature or lower operation pressure. The engineering application provided that optimize the steam pipe network with the economical flow rate model could effectively reduce the energy loss in transportation, so that significant economic benefits could be obtained.
出处
《计算机与应用化学》
CAS
2017年第9期724-728,共5页
Computers and Applied Chemistry
基金
基金项目:百万吨级烯烃(煤化工副产品深加工综合利用)智能制造新模式推广应用
关键词
蒸汽管网
经济流速
设计优化
操作优化
pipe network
economical flow rate
design optimization
operating optimization
