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• W4385296675 endingPage "27952" @default.
• W4385296675 startingPage "27932" @default.
• W4385296675 abstract "The increase in altitude causes the decrease in internal combustion engine power and the increase in pollutant emission. Converting waste heat into more useful forms of energy through the recovery of waste heat from internal combustion engines is the most promising mechanism for improving both of these goals. This paper comprehensively reviews the development and research of waste heat recovery technology of an internal combustion engine in a variable altitude environment. It is found that exhaust gas turbocharging is the most promising waste heat recovery technology to restore high-altitude internal combustion engine power. Turbochargers are affected by low temperature and low pressure at high altitudes, resulting in poor environmental adaptability, inadequate supercharging ratios, and decreased supercharging efficiency. Therefore, it is very important to select the high pressurization system facing the plateau area and its reasonable matching characteristics. The quality of exhaust energy determines how much waste heat a turbine can recover, and only the exergy part of exhaust energy can realize heat/work conversion. The main disadvantage of turbocharging technology applied in the plateau area is that the speed ratio deviates from the design value, leading to the increase of flow loss inside the supercharger. Therefore, optimizing the internal flow field of a high-altitude supercharger is a key problem to improve the efficiency of energy recovery. The conclusion drawn from this Review is that a two-stage turbocharging system will be a key technology to improve the thermal efficiency and reduce the fuel consumption of high-altitude internal combustion engines in the coming decades. In addition, the efficient utilization of the exhaust energy of the two-stage turbine and the influence of the variable compression process of the two-stage compressor on the working medium in the cylinder will be the focus of future research." @default.
• W4385296675 created "2023-07-28" @default.
• W4385296675 creator A5004553442 @default.
• W4385296675 creator A5012925928 @default.
• W4385296675 creator A5015415276 @default.
• W4385296675 creator A5049893504 @default.
• W4385296675 creator A5050852420 @default.
• W4385296675 creator A5061703108 @default.
• W4385296675 creator A5086588044 @default.
• W4385296675 date "2023-07-27" @default.
• W4385296675 modified "2023-09-25" @default.
• W4385296675 title "Summary of Turbocharging as a Waste Heat Recovery System for a Variable Altitude Internal Combustion Engine" @default.
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