对于地热源再热双压有机朗肯循环（R-DPORC）系统因冷/热源瞬态波动变化所造成的运行不稳定问题,有针对性地提出恒定负荷和变负荷控制两种策略。利用Matlab/Simscape建立R-DPORC系统动态仿真模型,对冷/热源及负荷变化条件下系统的动态响应特性进行分析,研究系统效率、过热度、压力和质量流量的变化规律。结果表明,调节工质泵的流量是实现R-DPORC系统动态控制的关键手段,根据具体的工作场景可灵活组合不同的运行模式,通过控制调节能使系统逐步实现新的稳定状态并达到输出要求。优化后的控制策略可显著提高系统在复杂工况下的动态适应性,可保障系统长期稳定运行和更高的能效输出。
Abstract
To address the operational instability of the geothermal reheated dual-pressure organic Rankine cycle （R-DPORC） system caused by transient fluctuations in cold/heat sources, this study proposes two targeted control strategies： constant-load control and variable-load control. A dynamic simulation model of the R-DPORC system has been developed using Matlab/Simscape to analyze its dynamic response characteristics under varying cold/heat source conditions and load changes. The variations in system efficiency, degree of superheat, pressure, and mass flow rate are investigated. Results indicate that regulating the flow rate of working fluid pump is a critical method for achieving dynamic control of the R-DPORC system. Depending on specific operational scenarios, different operating modes can be flexibly combined. Through adjustments, the system can gradually achieve a new stable state and meet output requirements. Moreover, the optimized control strategy significantly improves the dynamic adaptability of the system under complex operating conditions, ensuring long-term stable operation and higher energy efficiency.
关键词
地热能 /
有机朗肯循环 /
动态仿真 /
控制策略 /
机械功率 /
质量流量
Key words
geothermal energy /
organic Rankine cycle /
dynamic simulation /
control strategies /
mechanical power /
mass flow rate
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基金
辽宁省自然科学基金面上项目（2022-MS-398）; 辽宁省教育厅科研项目（JYTMS20230803; LJKMZ20220685）; 辽宁工程技术大学鄂尔多斯校企培育项目（YJY-XD-2023-007）
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