压力容器2025，Vol.42Issue(5)：56-65,10.DOI:10.3969/j.issn.1001-4837.2025.05.007
我国国家标准中NEN型固定式热交换器管板常规设计方法与分析设计法的比较
A comparison between conventional design method and analytical design method for tubesheets of NEN-type fixed heat exchangers in Chinese national standards
薛明德 1李世玉 2吴坚 1杨旭 2陈昊2
作者信息
- 1. 清华大学 工程力学系,北京 100084
- 2. 中国石化工程建设有限公司,北京 100101
- 折叠
摘要
Abstract
A comparison was conducted on the design methods for tubesheets of NEN-type fixed heat exchangers,as specified in two Chinese national standards:the conventional design method in GB/T 151-2014 and the analytical design method in GB/T 4732.3-2024.It was pointed out that these two methods share the same theoretical basis.However,the calculation method in GB/T 151-2014 is built on a simplified mechanical model derived from analytical design,which neglects the in-plane tensile deformation of the tubesheet and its edge structures.The two design methods were applied to calculate three NEN-type heat exchanger examples with different diameters,and the tubesheet stresses obtained were compared.Meanwhile,a detailed mechanical analysis was performed using the 3D solid finite element method.From the above analysis,the following conclusions were drawn:the basic assumptions for the tube layout area of the tubesheet and the recommended weakening coefficients in the two national standards are reasonable;for small-diameter NEN-type heat exchangers that fall within the application scope of GB/T 151-2014,the conventional design method specified therein is reliable;for large-diameter NEN-type heat exchangers,the analytical design method in GB/T 4732.3-2024 should be adopted for tubesheet calculation.The research results provide a reference for the design of NEN-type heat exchangers.关键词
NEN型固定式热交换器/管式热交换器标准/设计方法/管板Key words
NEN-type fixed heat exchanger/tubular heat exchanger standard/design methods/tubesheet分类
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薛明德,李世玉,吴坚,杨旭,陈昊..我国国家标准中NEN型固定式热交换器管板常规设计方法与分析设计法的比较[J].压力容器,2025,42(5):56-65,10.
