A general distributed-parameter model for thermal performance of cold box with parallel plate-fin heat exchangers based on graph theory

作     者：Sun, Haoran Hu, Haitao Ding, Guoliang Chen, Hui Zhang, Zhigang Wu, Chunlin Wang, Lichun 

作者机构：Shanghai Jiao Tong Univ Inst Refrigerat & Cryogen Shanghai 200240 Peoples R China Shanxi Fenxi Heavy Ind Co Ltd Taiyuan 030027 Shanxi Peoples R China Shanxi Fenxi Electromech Co Ltd Taiyuan 030027 Shanxi Peoples R China 

出 版 物：《APPLIED THERMAL ENGINEERING》 (实用热力工程)

年 卷 期：2019年第148卷

页      面：478-490页

核心收录：

学科分类：0820[工学-石油与天然气工程] 080702[工学-热能工程] 08[工学] 0807[工学-动力工程及工程热物理] 0802[工学-机械工程] 0801[工学-力学（可授工学、理学学位）] 

主　　题：Distributed-parameter Cold box Plate-fin heat exchanger Model Graph theory 

摘      要：For predicting the thermal performance of cold box with parallel plate-fin heat exchangers, a general distributed-parameter model based on graph theory was developed. In the present study, a mathematical description model of cold box based on graph theory was established, capable of describing the connection relations of multiple streams and components in cold box;a distributed-parameter thermal performance model of plate-fin heat exchangers based on approximate analytical method was developed, and the temperature gradients along both axial and transversal directions are reflected;a mass flow rate distribution model of parallel pipelines based on the pressure balance was presented to calculate the flow distribution of multiple streams in pipelines. A tailor-made iteration algorithm using graph-based traversal method was developed to solve the present model. The validation of the proposed model shows that the deviations of the calculated heat capacity and outlet temperature of natural gas from experimental data are -1.9% and +4.35 degrees C, respectively.