Modeling and performance simulation for recupe rator heat exchangers based on Modelica/Dymola

CHENG Chao-jun1，HAO Xing-jun1，LI Chao-wei1，ZHANG Jian-hua2，ZHANG Jie2，LI Guo-jian3

（1. Wenzhou Gas Group Co.，Ltd.，Wenzhou 325000，China；

2. Institute of Energy and Power Engineering，Zhejiang University of Technology，Hangzhou 310014，China；

3. School of Civil Engineering and Architecture，Zhejiang Sci-Tech University，Hangzhou 310018，China）

Abstract：Recuperative heat exchanger was widely used in the distributed power system，petrochemical and other fields with the advantages of efficient in heat efficiency，economy，compact and lightweight Structure and long service life. Aiming at researching the dynamic characteristic of the heat exchanger with the hot and cold fluid of different temperatures，an object- oriented method was employed to decompose the heat exchanger into the geometric parameters module，heat transfer module，flow module and physical property parameters module，and on the basis of the law of the conservation of mass，momentum and energy，Modelica and Dymola with multidomain language，which is an object-oriented and incausal，were used to bulid the simulation model library of heat exchanger. Taking a simple parallel flow as an example，the system simulation model was set up and the accuracy of the model was verified，then the dynamic characteristic of the heat exchanger with the hot and cold fluid of different temperatures was analyzed. The research results indicate that，the modelica languege was simple and more easily understandable，also the built model library easy to maintain and upgrade and the errors was small enough，so it has the very good reusability and extensibility.