Inverse Problem and Variation Method to Optimize Cascade Heat Exchange Network in Central Heating System

查看全文 作　　者：ZHANG [1,2]Yin;WEI [2]Zhiyuan;ZHANG [2]Yinping;WANG [2]Xin

机构地区：[1]College of Architecture and Environment, Sichuan University;[2]Department of Building Science, Tsinghua University

出　　处：《Journal of Thermal Science》索引2017年第26卷第6期,共7页

基　　金：financed by National Key Research and Development Program of China(2016YFB0901405);National Natural Science Foundation of China(51706148);Sichuan Science and Technology Program(2017JY0333) 摘　　要：Urban heating in northern China accounts for 40% of total building energy usage. In central heating systems, heat is often transferred from heat source to users by the heat network where several heat exchangers are installed at heat source, substations and terminals respectively. For given overall heating capacity and heat source temperature, increasing the terminal fluid temperature is an effective way to improve the thermal performance of such cascade heat exchange network for energy saving. In this paper, the mathematical optimization model of the cascade heat exchange network with three-stage heat exchangers in series is established. Aim at maximizing the cold fluid temperature for given hot fluid temperature and overall heating capacity, the optimal heat exchange area distribution and the medium fluids' flow rates are determined through inverse problem and variation method. The preliminary results show that the heat exchange areas should be distributed equally for each heat exchanger. It also indicates that in order to improve the thermal performance of the whole system, more heat exchange areas should be allocated to the heat exchanger where flow rate difference between two fluids is relatively small. This work is important for guiding the optimization design of practical cascade heating systems. 关键词：集中供热系统换热器变分法逆问题网络优化串级 NORTHERN 流体温度

相关文献

参考文献（27）
引证文献（7）
耦合文献（48）

参考文献(27)

引证文献(7)

耦合文献(48)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Inverse Problem and Variation Method to Optimize Cascade Heat Exchange Network in Central Heating System

参考文献(27)

引证文献(7)

耦合文献(48)

用户提示