Experimental study on the influence of pump frequencies and oil flow rates on the performance of organic rankine cycle systems

IF 6.4 2区工程技术 Q1 THERMODYNAMICS Case Studies in Thermal Engineering Pub Date : 2025-05-01 Epub Date: 2025-03-14 DOI:10.1016/j.csite.2025.106028

Jian Sun, Bin Peng

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引用次数: 0

Abstract

The organic Rankine cycle system can fully utilize the low-temperature waste heat generated by oil-free scroll air compressors, enhancing energy reuse efficiency. The heat source temperature (HST), working pump frequency, and filling quantity of the working fluids varied to achieve variable operating conditions for the experimental system. Experimental studies showed that the working pump frequency has a significant impact on the theoretical shaft power of the expander compared to the HST and the filling quantity (FQ) of the working fluids. At a working fluid filling quantity of 8 kg and HST of 120 °C, increasing the working pump frequency from 10 to 50 Hz results in the theoretical shaft power of the expander, power consumption of the working pump, and the system thermal efficiency varying in the ranges of 0.993–1.777

kW

, 0.063–0.143

kW

and 4.979–6.436 %, respectively. While elevating the frequency of the working pump leads to a corresponding rise in the theoretical shaft power of the expander, it also increases the power consumption of the working pump. Lubricating oil has a considerable impact on system performance. At an HST of 120 °C, the net system work attains a maximum value of 2.093

kW

with 100 % lubricant and pump plunger stroke (PPS).

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泵频和油流量对有机朗肯循环系统性能影响的实验研究

有机朗肯循环系统可以充分利用无油涡旋式空压机产生的低温余热，提高能源再利用效率。热源温度（HST）、工作泵频率和工作流体填充量的变化使实验系统的工作条件发生变化。实验研究表明，与HST和工作流体填充量相比，工作泵频率对膨胀机的理论轴功率有显著影响。当工作流体填充量为8 kg，高温温度为120℃时，将工作泵频率从10 Hz提高到50 Hz，膨胀机的理论轴功率、工作泵功耗和系统热效率分别在0.993 ~ 1.777 kW、0.063 ~ 0.143 kW和4.979 ~ 6.436%之间变化。提高工作泵的频率，导致膨胀机的理论轴功率相应提高的同时，也增加了工作泵的功耗。润滑油对系统性能有相当大的影响。当高温温度为120°C时，在100%润滑和泵柱塞冲程（PPS）的情况下，系统净功达到2.093 kW的最大值。

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.