A review of turbocompounding as a waste heat recovery system for internal combustion engines

Aghaali, Habib; Ångström, Hans-Erik

doi:10.1016/j.rser.2015.04.144

Cited by 155 publications

(67 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Due to this great potential of waste heat recovery (WHR) in automotive, many efforts have been made in this field during the last few years, such as turbo-compounding [5], Rankine cycles [6], thermoelectric generators (TEG) [7], thermochemical recuperation (TCR) [8], and Stirling engines [9]. TEG has attracted substantial interest because of its advantage of silent operation, and compactness.…”

Section: Introductionmentioning

confidence: 99%

The Potential of Thermoelectric Generator in Parallel Hybrid Vehicle Applications

Song¹,

Rouaud²,

Stobart³

et al. 2017

SAE Technical Paper Series

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

The Potential of Thermoelectric Generator in Parallel Hybrid Vehicle Applications

Song¹,

Rouaud²,

Stobart³

et al. 2017

SAE Technical Paper Series

View full text Add to dashboard Cite

“…ORC is always designed for the rated working conditions, but needs to be operated under various working conditions as the gaseous fuel engines often work at part-load. In practice, under the different working conditions of ICEs, the exhaust gas temperature of light-duty engines varies from 500 to 900˝C and that of heavy-duty engines is in the range of 400 to 650˝C [2,3]. The investigation conducted by Chammas and Clodic [4] has shown that the available exhaust gas energy varies greatly depending on engine conditions for a typical light duty engine.…”

Section: Introductionmentioning

confidence: 99%

Part-Load Performance Prediction and Operation Strategy Design of Organic Rankine Cycles with a Medium Cycle Used for Recovering Waste Heat from Gaseous Fuel Engines

2016

View full text Add to dashboard Cite

Abstract:The Organic Rankine Cycle (ORC) is regarded as a suitable way to recover waste heat from gaseous fuel internal combustion engines. As waste heat recovery systems (WHRS) have always been designed based on rated working conditions, while engines often work under part-load conditions, it is quite significant to analyze the part-load performance and corresponding operation strategy of ORC systems. This paper presents a dynamic model of ORC with a medium cycle used for a large gaseous fuel engine and analyzes the effect of adjustable parameters on the system performance, giving effective control directions under various conditions. The results indicate that the intermediary fluid mass flow rate has nearly no effect on the output power and thermal efficiency of the ORC, while the mass flow rate of working fluid has a great effect on them. In order to get a better system performance under different working conditions, the system should be operated with the working fluid mass flow rate as large as possible, but with a slight degree of superheating. Then, with the control of constant superheat degree at the end of the heating process, the performance of the combined system that consists of ORC and the engine at steady state under seven typical working conditions is also analyzed. The results indicate that the energy-saving effect of WHRS becomes worse and worse as the working condition decreases. Especially at 40% working condition the WHRS nearly has no energy-saving effect anymore.

show abstract

“…The time response in temperatures is approximately 40 s, whereas in mass flows is 5 s, as it can be seen in Figure 3.35 and Figure 3. 31. Moreover, the installation response to the NEDC is well controlled with the control layout performed.…”

Section: Experimental Testsmentioning

confidence: 92%

“…The generator extracts surplus power from the turbine, and the excess produced electricity is used to run a motor coupled to the engine crankshaft [31,32].…”

Section: Literature Reviewmentioning

confidence: 99%

See 1 more Smart Citation

Study of Organic Rankine Cycles for Waste Heat Recovery in Transportation Vehicles

Pascual¹

View full text Add to dashboard Cite

Regulations for ICE-based transportation in the EU seek carbon dioxide emissions lower than 95 g CO 2 /km by 2020. In order to fulfill these limits, improvements in vehicle fuel consumption have to be achieved. One of the main losses of ICEs happens in the exhaust line. Internal combustion engines transform chemical energy into mechanical energy through combustion; however, only about 15-32% of this energy is effectively used to produce work, while most of the fuel energy is wasted through exhaust gases and coolant. Therefore, these sources can be exploited to improve the overall efficiency of the engine. Between these sources, exhaust gases show the largest potential of Waste Heat Recovery (WHR) due to its high level of exergy. Regarding WHR technologies, Rankine cycles are considered as the most promising candidates for improving Internal Combustion Engines. However, the implementation of this technology in modern passenger cars requires additional features to achieve a compact integration and controllability in the engine. While industrial applications typically operates in steady state operating points, there is a huge challenge taking into account its impact in the engine during typical daily driving profiles.This thesis contributes to the knowledge and characterization of an Organic Rankine Cycle coupled with an Internal Combustion Engine using ethanol as working fluid and a swash-plate expander as expansion machine. The main objective of this research work is to obtain and quantify the potential of Organic Rankine Cycles for the use of residual energy in automotive engines. To do this, an experimental ORC test bench was designed and built at CMT (Polytechnic University of Valencia), which can be coupled to different types of automotive combustion engines. Using these results, an estimation of the main variables of the cycle was obtained both in stationary and transient operating points. A potential of increasing ICE mechanical efficiency up to 3.7% could be reached at points of high load installing an ORC in a conventional turbocharged gasoline engine. Regarding transient conditions, a slightly simple and robust control based on adaptive PIDs, allows the control of the ORC in realistic driving profiles. High loads and hot conditions should be the starting ideal conditions to test and validate the control of the ORC in order to achieve high exhaust temperatures that justify the feasibility of the system.In order to deepen in the viability and characteristics of this particular application, some theoretical studies were done. A 1D model was developed using LMS Imagine.Lab Amesim platform. A potential improvement of 2.5% in fuel conversion efficiency was obtained at the high operating points as a direct consequence of the 23.5 g/kWh reduction in bsfc. To conclude, a thermo-economic study was developed taking into account the main elements of the installation costs and a minimum Specific Investment Cost value of 2030 C/kW was obtained. Moreover, an exergetic study showed that a total amount of 3.75 kW...

show abstract

A review of turbocompounding as a waste heat recovery system for internal combustion engines

Cited by 155 publications

References 83 publications

The Potential of Thermoelectric Generator in Parallel Hybrid Vehicle Applications

The Potential of Thermoelectric Generator in Parallel Hybrid Vehicle Applications

Part-Load Performance Prediction and Operation Strategy Design of Organic Rankine Cycles with a Medium Cycle Used for Recovering Waste Heat from Gaseous Fuel Engines

Study of Organic Rankine Cycles for Waste Heat Recovery in Transportation Vehicles

Contact Info

Product

Resources

About