CAJ | 학술논문

以折流板结构为基础将管壳式换热器分成一定的计算单元，通过对每个分段单元的研究，从流体物性沿壳体方向变化方面来对管壳式换热器进行整体的工艺设计及计算。并且基于微分法，提出了一种较为准确预测出管壳式换热器管、壳侧壁温分布的方法。通过工程案例分析，并将壁温计算结果与HTRI进行对比得出，管、壳程各单元的壁温平均误差分别1.76%和0.94%，该结果也验证了壁温计算方法的可行性。对于传热系数与压降，与 HTRI 对比得出：变物性计算较定物性在精度有一定的提高。同时通过借助Matlab计算机软件编制了一套用于管壳式换热器分段计算及优化设计程序，实现了换热器的精确优化设计的同时也提高了计算效率，变物性的研究理论为高效低能耗换热器的设计提供了思路和方法，具有一定的工程应用价值。
이절류판결구위기출장관각식환열기분성일정적계산단원，통과대매개분단단원적연구，종류체물성연각체방향변화방면래대관각식환열기진행정체적공예설계급계산。병차기우미분법，제출료일충교위준학예측출관각식환열기관、각측벽온분포적방법。통과공정안례분석，병장벽온계산결과여HTRI진행대비득출，관、각정각단원적벽온평균오차분별1.76%화0.94%，해결과야험증료벽온계산방법적가행성。대우전열계수여압강，여 HTRI 대비득출：변물성계산교정물성재정도유일정적제고。동시통과차조Matlab계산궤연건편제료일투용우관각식환열기분단계산급우화설계정서，실현료환열기적정학우화설계적동시야제고료계산효솔，변물성적연구이론위고효저능모환열기적설계제공료사로화방법，구유일정적공정응용개치。
In this paper, on the basis of the baffle plates, a shell and tube heat exchanger is divided into certain cells, and though the study of each cell, the process design and calculation of shell and tube heat exchanger with temperature dependent thermal properties are studied. What’s more, a much more accurate method is put forward for the tube shell heat exchanger to calculate the wall temperature both of the shell and tube side which bases on the differentiation. According to a case analysis, the mean error which separately compared with the HTRI’s in the both of shell and tube sides are 0.94% and 1.76%, which demonstrates the feasibility of the wall temperature calculation method. And from the results compared with the HTRI’s on the heat transfer coefficient and pressure drop, we can conclude that the computed result with variable properties is better than the fixed properties. With the aid of Matlab computer software, a whole set of procedures are compiled for the shell and tube heat exchanger segmented calculation and optimization design, which not only contributes to realizing the precise optimization design but also improving the calculation efficiency, and variable property research theory provides a certain way for efficient and low energy consumption heat exchanger design, it is of certain value for engineering application.