Power enhancement of a turbo-charged industrial diesel engine by using of a waste heat recovery system based on inverted Brayton and organic Rankine cycles

Salek, Farhad; Babaie, Meisam; Naserian, Mohammad Mahdi; Ahmadi, Mohammad Hossein

doi:10.1016/j.fuel.2022.124036

Cited by 19 publications

(3 citation statements)

References 30 publications

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“…The lower the engine speed required to get high torque, the easier it is to move the vehicle [4,5]. While the machine's power affects the machine's ability to perform work cycles [6,7].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Boosting Engine Torque and Horsepower via Diffuser Installation on the Exhaust Pipe

Kultsum¹,

Putro²

2023

CERIE

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The Internal Combustion Engine (ICE) that runs on fossil fuels is still commonly utilized as a mode of transportation. In ICE, there typically happens an overlapping stage in which the intake and exhaust valves are both open. There are advantages to overlapping in an engine, such as working on the chamber scavenging process and lowering the temperature in preparation for the following work cycle. However, engine overlap also has drawbacks, such as the possibility of wasting the fresh air and fuel combination in the exhaust, which can decrease engine performance. The majority of overlapping studies are conducted on heavy-duty engines, making research on the effect of overlapping on motorcycle ICE exceptionally rare. As a result, an experiment will be carried out in this study to improve the light-duty ICE's performance by lowering the amount of fresh mixture wasted during the overlap process utilizing a diffuser. The Diffuser works on the principle of decreasing flow and increasing pressure. By adding a diffuser, it is believed that the amount of fresh mixture lost along with the exhaust can be reduced. This study's diffuser is an aluminum ring with various angles of 40°, 50°, and 40°. Each Diffuser Ring is installed to the exhaust pipe, and a Dynotest is conducted to collect engine performance data, specifically Torque and Power. The torque and power data results of a motorcycle equipped with a diffuser are then compared to the torque and power data results of a motorcycle operating under normal conditions or without a diffuser installed. The findings suggest that the smaller the angle of the diffuser, the better the torque and power output. Through this article, it is envisaged that, in the future, the diffuser will also be applicable to vehicles carrying greater loads and heavy-duty engines.

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“…The lower the engine speed required to get high torque, the easier it is to move the vehicle [4,5]. While the machine's power affects the machine's ability to perform work cycles [6,7].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Boosting Engine Torque and Horsepower via Diffuser Installation on the Exhaust Pipe

Kultsum¹,

Putro²

2023

CERIE

View full text Add to dashboard Cite

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“…They indicated that employing PT would provide a 3-5% recovery ratio, while adopting RC would provide a 5-8% recovery ratio, and utilizing PT-RC would provide an 8-11% recovery ratio. Currently, in the view of technical maturity, PT and RC are significantly suit for maritime applications [44][45][46]. However, as noted above, the low-temperature exhaust gas of a high-efficient engine could make RC shut down [22,27,47,48], which was the reason for the tuning strategy.…”

Section: Introductionmentioning

confidence: 99%

Improving the Overall Efficiency of Marine Power Systems through Co-Optimization of Top-Bottom Combined Cycle by Means of Exhaust-Gas Bypass: A Semi Empirical Function Analysis Method

Liu

Feng

et al. 2023

JMSE

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The mandatory implementation of the standards laid out in the Energy Efficiency Existing Ship Index (EEXI) and the Carbon Intensity Indicator (CII) requires ships to improve their efficiency and thereby reduce their carbon emissions. To date, the steam Rankine cycle (RC) has been widely used to recover wasted heat from marine main engines to improve the energy-conversion efficiency of ships. However, current marine low-speed diesel engines are usually highly efficient, leading to the low exhaust gas temperature. Additionally, the temperature of waste heat from exhaust gas is too low to be recovered economically by RC. Consequently, a solution has been proposed to improve the overall efficiency by means of waste heat recovery. The exhaust gas is bypassed before the turbocharger, which can decrease the air excess ratio of main engine to increase the exhaust gas temperature, and to achieve high overall efficiency of combined cycle. For quantitative assessments, a semi-empirical formula related to the bypass ratio, the excess air ratio, and the turbocharging efficiency was developed. Furthermore, the semi-empirical formula was verified by testing and engine model. The results showed that the semi-empirical formula accurately represented the relationships of these parameters. Assessment results showed that at the turbocharging efficiency of 68.8%, the exhaust temperature could increase by at least 75 °C, with a bypass ratio of 15%. Moreover, at the optimal bypass ratio of 11.1%, the maximum overall efficiency rose to 54.84% from 50.34%. Finally, EEXI (CII) decreased from 6.1 (4.56) to 5.64 (4.12), with the NOx emissions up to Tier II standard.

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“…Vehicles powered by IC engines emit 20%-30% of greenhouse gas emissions. Additionally, there is a severe problem with fossil fuel depletion and growing awareness of deteriorating climate conditions has prompted the development of alternative energy sources [2]. Therefore, electric vehicles (EVs) are suitable alternatives to replace combustion vehicles.…”

Section: Introductionmentioning

confidence: 99%

Emerging Intelligent Bidirectional Charging Strategy Based on Recurrent Neural Network Accosting EMI and Temperature Effects for Electric Vehicle

et al. 2022

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Transportation is currently advancing towards Electric Vehicle (EV) technology. This paper presents a brief and systematic analysis of the real-time issues obtained in Electric Vehicles (EVs) due to the various ranges of energy storage devices. In general, EV energy management system is integrated with power electronic circuits for effective power conversion and reliable operation. Some issues are addressed while using the batteries in EV systems such as charging time, efficiency of battery, and raw materials. Not only battery issues but also real-time non-technical issues and operational issues are also discussed in this paper. During energy conversion with power electronic circuits, the system attains extreme temperature levels which in turn reduces the performance of the system. To maintain an optimum temperature level, it is important to study the temperature effect of the system at the most prior levels. Due to the adaption of power electronic components, some extent of noise is generated, technically treated as Electromagnetic Interference (EMI), as system capacity increases the EMI content also improved proportionately. Therefore, to mitigate the EMI effect, the low pass filter-based EMI filter is introduced in the system such that the noise level is suppressed. Bidirectional Charging System (BCS) is one of the emerging technologies in EV to obtain autonomous power supply systems in the form of Vehicle to Grid (V2G), Grid to Vehicle (G2V), and Vehicle to Load (V2L). To know the behaviour of BCS the proposed RNN controller is employed and is compared with ANN bidirectional charging model. BCS charging system with RNN controller has better dynamic response to exchange the power via DC/DC converter and AC/DC converter as compared to ANN controller.

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Power enhancement of a turbo-charged industrial diesel engine by using of a waste heat recovery system based on inverted Brayton and organic Rankine cycles

Cited by 19 publications

References 30 publications

Analysis of Boosting Engine Torque and Horsepower via Diffuser Installation on the Exhaust Pipe

Analysis of Boosting Engine Torque and Horsepower via Diffuser Installation on the Exhaust Pipe

Improving the Overall Efficiency of Marine Power Systems through Co-Optimization of Top-Bottom Combined Cycle by Means of Exhaust-Gas Bypass: A Semi Empirical Function Analysis Method

Emerging Intelligent Bidirectional Charging Strategy Based on Recurrent Neural Network Accosting EMI and Temperature Effects for Electric Vehicle

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