A Grey-Box Dynamic Model of Plate Heat Exchangers Used in an Urban Heating System

被引：16

作者：

Miao, Qingwei ^{[1
]}

You, Shijun ^{[1
]}

Zheng, Wandong ^{[1
,2
]}

Zheng, Xuejing ^{[1
]}

Zhang, Huan ^{[1
]}

Wang, Yaran ^{[1
]}

机构：

[1] Tianjin Univ, Sch Environm Sci & Technol, Tianjin 300072, Peoples R China

[2] China Acad Bldg Res, State Key Lab Bldg Safety & Built Environm, Beijing 100013, Peoples R China

来源：

ENERGIES | 2017年 / 10卷 / 09期

关键词：

plate heat exchanger; grey-box method; white-box method; parameter identification; GENERALIZED CONFIGURATIONS; DESIGN;

D O I：

10.3390/en10091398

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This paper deals with the establishment of a grey-box model of plate heat exchangers. First, a second-order state space model of plate heat exchangers is developed. Then, the model is solved by the white-box method and grey-box method, respectively. In the white-box method, the linearization of the state space model is carried out by implicit difference scheme and the overall heat transfer coefficient was calculated with empirical correlation of the Nusselt number. In the grey-box method, a newly developed parameter identification method was established. The simulation results of two outlet temperatures by the grey-box and white-box method, respectively, are compared with the test data. It is shown that the grey-box method is more suitable and accurate for the simulations of outlet temperatures than the white-box method. Thus, it can provide practitioners and heating engineers with tools to design controllers for district heating systems.

引用

页数：16

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