The Effect of Heat Exchange Fluid Composition on the Performance of a Liquid Nitrogen Engine System
| Autor: | Fanos Christodoulou, Colin P. Garner, Daniel Fennell, Huayong Zhao, Vitaliy Sechenyh |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Engine power
Thermal efficiency Control and Optimization Materials science 020209 energy liquid nitrogen engine Energy Engineering and Power Technology 02 engineering and technology refrigeration system lcsh:Technology Brake Heat exchanger 0202 electrical engineering electronic engineering information engineering Specific energy Electrical and Electronic Engineering Process engineering Engineering (miscellaneous) Renewable Energy Sustainability and the Environment business.industry lcsh:T cryogenic engine Refrigeration 021001 nanoscience & nanotechnology Power (physics) Auxiliary power unit 0210 nano-technology business Energy (miscellaneous) |
| Zdroj: | Energies, Vol 14, Iss 1474, p 1474 (2021) Energies Volume 14 Issue 5 |
| ISSN: | 1996-1073 |
| Popis: | It has been proven that performance gains in liquid nitrogen (LN2) engine systems, generating simultaneous cooling and auxiliary power, can be achieved through integration of a dedicated heat exchange fluid (HEF) circuit. The novel, HEF enhanced LN2 engine system can be utilised as an optimised hybrid solution for commercial refrigeration trucks. Although the benefits arising from HEF addition have been researched, there are no articles investigating the effect of changing the HEF composition on engine performance. This article reports a detailed experimental investigation on the performance of a novel, HEF enhanced LN2 engine system. The key contribution of the current study is the knowledge generated from investigating the impact of different HEF compositions on the engine performance under different HEF temperatures, N2 inlet conditions and engine speeds. The HEF composition was varied through changing the water content in the mixture. A thermodynamic model based on an idealised cycle was used to assist interpretation of the experimental results and assess the potential of the proposed engine architecture. The experimental study demonstrated up to 42.5% brake thermal efficiency, up to 2.67 kW of brake power and up to 174 kJ/kg specific energy, which were higher than previously published figures for LN2 engine systems. A reduction in the HEF water content was found to generally increase the engine power output at a HEF temperature of 30 °C. However, at a HEF temperature of 60 °C, the impact of HEF composition was found to be minor and nonmonotonic. The thermodynamic model predicted the upper and lower limits of the measured indicated power and indicated thermal efficiency with acceptable accuracy. |
| Databáze: | OpenAIRE |
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