冷板式换热反应器结构设计

Cold Plate—Heat Transfer Reactor Structure Design

关键词:  冷板  换热  反应器  催化剂  热阻  传热系数  温差  数值模拟

Key words:  cold plate  heat exchange  reactor  catalyst  heatresistance  heat transfer coefficient  temperature difference  numer-ical simulation

摘要:

针对传统管壳式换热反应器热阻大、传热系数小的缺点,采用独特设计的新型冷板作为换热元件,开发一种传热系数高、结构紧凑的冷板式换热反应器。通过数值模拟分析催化剂床层及冷板内部流体的速度场及温度分布情况,验证新型冷板式换热反应器的传热系数及传热性能,分析结果显示新型冷板的内部网状通道使流体流动方向和速度不断改变,加剧了流体的湍流效应,打破滞留边界层,降低了热阻。计算得出,新型冷板式换热反应器与传统管壳式换热反应器相比,传热系数明显提高。

Abstract:

In view of the disadvantage of traditional shell—tube heat transfer reactor, a new cold plate—heat transfer reactor isdesigned, which adopts new cold plate to be heat exchange element.This article analyzes velocity field and temperature distribution ofcatalyst bed and cold liquid inside cold plate by means of numericalsimulation, validates heat transfer coefficient and heat transfer per-formance of new reactor. The results show that liquid flow directionand velocity change constantly which result in aggravation of turbu-lence effect, breaking stagnation boundary layer and reducing theheat resistance. Comparing with traditional shell—tube heat transferreactor, the calculated heat transfer coefficient of the cold plate—heat transfer reactor is improved obviously.