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为了分析有机朗肯循环系统能质传递和利用的动态特性,以热力学第二定律为基础建立了有机朗肯循环系统的传递分析模型。参照工程传递评价准则,应用阻流密度、流密度降低率等,完成对ORC系统的传递分析。通过与常规的分析结果,得出了一些信息:流密度降低率最高的部位为冷凝器,最低的部位为膨胀机,阻最高的部位在回热器和冷凝器;蒸发器中的阻较小,损率、流密度降低率都较高,因此有机朗肯循环节能改造的关键在于蒸发器的改造;在回热器中由于温度差小,即强度量差(温差)较小,因此推动传递的动力就较小,从而阻较大。
In order to analyze the dynamic characteristics of the energy transfer and utilization of the organic Rankine cycle system, the transfer analytical model of organic Rankine cycle system is established based on the second law of thermodynamics. Refer to the project, transfer evaluation criteria, application, flow resistance, flow density reduction rate, etc., to complete the ORC system transfer analysis. Some general information was obtained from the results of the analysis: the area with the highest reduction in flow density was the condenser, the lowest part was the expander, and the area with the highest resistance was in the regenerator and the condenser. The resistance in the evaporator Therefore, the key to the energy saving of organic Rankine cycle is the revamping of the evaporator. Because of the small temperature difference in the regenerator, ie, the smaller the difference in strength (temperature difference) Therefore, the driving force of transmission is smaller, so the resistance is larger.