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首页> 外文期刊>International Journal of Heat and Mass Transfer >Direct optimal control of valve openings in heat exchanger networks and experimental validations
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Direct optimal control of valve openings in heat exchanger networks and experimental validations

机译：直接优化控制热交换器网络中的阀门开度并进行实验验证

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摘要

Heat exchanger networks (HENs) optimizations benefit the energy conservation, with many set point strategies controlling the operations indirectly by the help of detail control techniques. Based on the newly proposed thermal resistance-based optimization method and the flow resistance analysis, we obtain the physical models of heat exchangers, pumps and pipelines with adjustable valves. Combining these models, we introduce a direct optimal control strategy for adjustable valves in HENs to obtain the optimal valve openings directly. On this basis, we take a HEN with two heat exchangers as an example to validate the proposed control strategy. Groups of experiments and the results illustrate the optimal valve openings obtained from the proposed strategy lead a lower power consumption of all the pumps than that of any other alternative experiment, which indicates the potentials to reduce power consumption by the optimal control of valves. Finally, further experiments with optimal valve openings under different required heat transfer rates demonstrate the universality of the newly proposed control strategy.
机译：热交换器网络（HENs）的优化有益于节能，许多设定点策略借助详细控制技术间接控制运行。基于新提出的基于热阻的优化方法和流阻分析，我们获得了具有可调节阀的热交换器，泵和管道的物理模型。结合这些模型，我们为HENs中的可调阀引入直接的最佳控制策略，以直接获得最佳的阀开度。在此基础上，我们以带有两个热交换器的HEN为例，验证了所提出的控制策略。实验组和结果表明，与其他任何替代实验相比，从所提出的策略中获得的最佳阀门开度导致所有泵的功耗更低，这表明有可能通过对阀门的最佳控制来降低功耗。最后，在不同的要求的传热速率下使用最佳阀门开度进行的进一步实验证明了新提出的控制策略的普遍性。

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