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 : 2025-03-14 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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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.