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集中供热系统热网控制策略的研究 被引量:1
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作者 宋秦中 宋新玲 +2 位作者 刘科 陆军 孙菲菲 《南通职业大学学报》 2012年第3期84-88,共5页
集中供热系统热网有着多输入、多输出、非线性、时变性、强耦合的特点,智能解耦控制算法是解决热网流量控制的有效方法。文章讨论了神经网络解耦控制策略,设计了基于非线性、多变量的神经网络解耦控制器。应用于实验室热网控制的结果表... 集中供热系统热网有着多输入、多输出、非线性、时变性、强耦合的特点,智能解耦控制算法是解决热网流量控制的有效方法。文章讨论了神经网络解耦控制策略,设计了基于非线性、多变量的神经网络解耦控制器。应用于实验室热网控制的结果表明,该控制算法有明显的控制效果,能实现稳定供热和均匀供热的整体目标。 展开更多
关键词 集中供热系统热网 神经 解耦控制 控制策略
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Inverse Problem and Variation Method to Optimize Cascade Heat Exchange Network in Central Heating System 被引量:5
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作者 ZHANG Yin WEI Zhiyuan +1 位作者 ZHANG Yinping WANG Xin 《Journal of Thermal Science》 SCIE EI CAS CSCD 2017年第6期545-551,共7页
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 in... 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 tempera- tore, 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 cas- cade 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 dis- tribution and the medium fluids' flow rates arc 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 al- so indicates that in order to improve the thermal performance of the whole system, more heat exchange areas should be allocated to the heat exchanger whore flow rate difference between two fluids is relatively small. This work is important for guiding the optimization design of practical cascade heating systems. 展开更多
关键词 District heating Heat exchanger Thermal performance optimization Inverse problem Lagrange variation
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