On the indicated efficiency of a high-speed triple-screw pump for internal combustion engine cooling

IF 9 1区工程技术 Q1 ENERGY & FUELS

Energy Pub Date : 2025-03-29 DOI:10.1016/j.energy.2025.135915

Giammarco Di Giovine, Marco Di Bartolomeo, Roberto Cipollone

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引用次数: 0

Abstract

Improved thermal management of Internal Combustion Engines (ICEs) can help meet stringent emissions regulations in the road transportation sector. This strategy requires high-efficiency pumps capable of controlling the cooling flow precisely and efficiently. Compared to centrifugal pumps, screw-type volumetric ones maintain high efficiency even when operating far from the design point, resulting in significant energy and emissions reductions.

This paper investigates a Triple-Screw Pump (TSP) optimized for an engine cooling system, with particular emphasis on the complex fluid-dynamic phenomena occurring inside it. Indeed, the relatively high rotational speed needed to reduce the pump size worsens volumetric and indicated efficiencies with respect to more conventional operating conditions (low speed), making fluid-dynamic phenomena even more complex. A zero-dimensional mathematical model for predicting the indicated efficiency even at high revolution speeds was developed. The model was validated experimentally thanks to a complex procedure based on the measurement of pressure variations inside the volumes among the screws. A close match with the average pressures measured inside these volumes was found, leading to an error in the indicated power below 7.3 %. The pump global efficiency was higher than 50 % even at high revolution speeds, useful in all applications (as engine cooling) requiring high pump efficiency.

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来源期刊

Energy 工程技术-能源与燃料

CiteScore

15.30

自引率

14.40%

发文量

审稿时长

14.2 weeks

期刊介绍： Energy is a multidisciplinary, international journal that publishes research and analysis in the field of energy engineering. Our aim is to become a leading peer-reviewed platform and a trusted source of information for energy-related topics. The journal covers a range of areas including mechanical engineering, thermal sciences, and energy analysis. We are particularly interested in research on energy modelling, prediction, integrated energy systems, planning, and management. Additionally, we welcome papers on energy conservation, efficiency, biomass and bioenergy, renewable energy, electricity supply and demand, energy storage, buildings, and economic and policy issues. These topics should align with our broader multidisciplinary focus.