药用蒸馏水机基本传热结构性能分析

Analysis of Heat Transfer Characteristics on a Basic Medicinal Water Distiller Unit

基于节能减排的趋势,生产药用蒸馏水和注射用水的蒸馏水机的传热性能日益受到关注。以列管式蒸馏水机传热基本单元的结构特点为基础,搭建了以水和水蒸气为传热介质的简易实验台。通过试验研究,得到不同工况下内置光管和波纹管两种形式蒸馏水机基本结构的传热性能;同时建立其流动与传热的三维简化计算模型,利用计算流体力学方法,分别对两种形式蒸馏水机进行数值模拟,将实验值与数值计算结果进行对比分析,并综合评价其换热性能,为药用蒸馏水机整体换热结构的性能优化提供了技术手段和理论依据。

On the basis of the trend of energy saving and emission reduction,the heat transfer performance of medicinal water distiller （MWD） for producing distilled water and water for injection has been attracting more and more attentions.Based on the basic structure and heat transfer characteristics of tubular MWD,a lab-scale set-up were built and experiments were carried out to determine the heat transfer coefficient and pressure drop by taking water and steam as the heat transfer medium.Furthermore,a three-dimensional simplified model of the basic unit for water-steam flow and heat transfer was established.The numerical simulation on vertical corrugated tubes and smooth tubes under different working conditions was investigated,and the temperature,velocity and pressure distributions were obtained,respectively.The comparative analysis was done between the numerical and the experimental results and the reliability of the simulation was thus proved.This paper provided an important and useful technical method for MWD design and application.