Waste Heat Recovery of Heavy-Duty Diesel Engines by Organic Rankine Cycle Part I: Hybrid Energy System of Diesel and Rankine Engines

Teng, Ho; Regner, Gerhard; Cowland, Chris

doi:10.4271/2007-01-0537

Cited by 116 publications

(59 citation statements)

References 12 publications

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“…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. A similar conclusion was obtained by Ringler [5] and Teng [6] based on a medium duty engine and typical truck diesel engine, respectively. In fact, exhaust gas flow rate and temperature variations lead the evaporator, even though properly designed, to severe conditions which make the waste heat recovery impossible [7].…”

Section: Introductionsupporting

confidence: 62%

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

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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.

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Section: Introductionsupporting

confidence: 62%

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

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“…Duparchy et al [32] indicates that the exhaust gases represents the greater recovery potential due to large difference in the thermodynamic properties of the two fluids and lower mass flow rates comparing exhaust gases with water (cooling loop), thus, irreversibility is reduced. Teng et al [33] showed that EGR and exhaust gases are the most suitable sources in terms of energy recovery because of its exergy value. V.…”

Section: Introductionmentioning

confidence: 99%

Experimental and thermodynamic analysis of a bottoming Organic Rankine Cycle (ORC) of gasoline engine using swash-plate expander

Galindo

Ruíz

Dolz

et al. 2015

Energy Conversion and Management

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“…For Heavy-Duty (HD) vehicles, exhaust gas temperatures range from 500 to 650 °C under general driving condition. These can be further boosted during periodical regenerations of diesel particulate filter (DPF) and other aftertreatment advices [7]. Those high exhaust temperatures provide significant opportunities for EER to generate energy for increasing powertrain's efficiency [6,8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of environmental and economic benefits of integrated Exhaust Energy Recovery (EER) for vehicles

Peng

Wang

et al. 2013

Applied Energy

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Differing from those traditional vehicle exhaust heat recovery systems which just provided thermal energy directly for cabin warming, integrated Exhaust Energy Recovery (EER) which is researched and developed mainly in recent years aims to convert exhaust thermal energy to mechanical or electric energy for increasing the total thermal efficiency and the total power of powertrain. In the study presented in this paper, an analytic model was built for examining the environmental and economic benefits of integrated EER systems. Then the improvement on the total powertrain efficiency and net reduction of CO 2 emissions were investigated, in terms of the average vehicle used in the UK. Results show that, for light duty vehicles fitted with thermal cycle EER system, the cost increase could be paid back in 10.1 years and CO 2 emission could be paid back in just 1.9 years, compared to Hybrid Electric Vehicle's (HEV's) 11.9 years and 1.4 years for cost and CO 2 emission, respectively. When the annual fuel price increase is considered, the cost pay-back is reduced to 8.1 years for EER vehicles and 8.9 years for HEVs. Higher mileage vehicles will have more obvious advantage for fitting EER system. When doubled annual mileage is considered, EER system can reduce the cost and CO 2 emission pay-back times to 2.7 years and 0.6 years, compared to HEV's 8.5 and 2.7 years, respectively.

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Waste Heat Recovery of Heavy-Duty Diesel Engines by Organic Rankine Cycle Part I: Hybrid Energy System of Diesel and Rankine Engines

Cited by 116 publications

References 12 publications

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

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

Experimental and thermodynamic analysis of a bottoming Organic Rankine Cycle (ORC) of gasoline engine using swash-plate expander

Analysis of environmental and economic benefits of integrated Exhaust Energy Recovery (EER) for vehicles

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