Utilizing the scavenge air cooling in improving the performance of marine diesel engine waste heat recovery systems

Mito, Mohamed T.; Teamah, Mohamed A.; El‐Maghlany, Wael M.; Shehata, Ali I.

doi:10.1016/j.energy.2017.10.039

Cited by 41 publications

(12 citation statements)

References 18 publications

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“…While it would be difficult to incorporate in a cost-effective way a system like the IBC/D/S/R in a truck, it could be a more realistic solution in large boats. As stated in Mito et al [38], reducing maritime transport CO 2 and NO x emissions calls for less fuel consumed. Large ships engines usually have exhaust gases colder than in land transportation.…”

Section: Example Of Applicationsmentioning

confidence: 98%

Maximizing specific work output extracted from engine exhaust with novel inverted Brayton cycles over a large range of operating conditions

Chagnon-Lessard

Copeland

Mathieu-Potvin

et al. 2020

Energy

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Section: Example Of Applicationsmentioning

confidence: 98%

Maximizing specific work output extracted from engine exhaust with novel inverted Brayton cycles over a large range of operating conditions

Chagnon-Lessard

Copeland

Mathieu-Potvin

et al. 2020

Energy

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“…While a need emerged to enhance ICEs efficiency using waste heat recovery for energy utilization. To reduce the pollution caused by the ship and improve the power system efficiency, the International Marine Organization (IMO) suggested that the total CO 2 emissions of the shipping sector should be reduced to 50% by 2050 (based 2018), which means designing and optimizing waste heat recovery (WHR) systems that recover waste heat energy and reduce the level of emissions at the same time have become attractive investments for ship owners [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of exhaust heat recovery of marine ice using organic rankine cycle

Wang¹,

Chen²,

Li³

et al. 2023

THERM SCI

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The use of organic Rankine cycle power systems for waste heat recovery on marine internal combustion engines can help to mitigate the greenhouse gases and reduce the fuel consumption of the marine engine. In this paper, the internal combustion engine combined with an organic Rankine cycle system was developed to analyze the performance of waste heat recovery from the exhaust gas of a heavy-duty marine diesel engine via five selected working fluids with low global warming potential and ozone depletion potential. The net output power and thermal efficiency for each of the selected working fluids were obtained. Results indicate that the working fluids of butane have the best performance among the selected working fluids with the power efficiency of the organic Rankine cycle subsystem of 12.27% under the power load of 100%. For the overall proposed system, the maximum net power output is 1048kW and the power efficiency is 36.47%. Besides, the total thermal efficiency of the proposed system was 67.94% when considering the recovered waste energy from jacket water.

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“…There are many studies on the simulation and optimization of various waste heat recovery systems of ship power systems. [9][10][11] The modeling method is mainly based on the energy balance equation, mass balance equation, exergy balance equation and such the state parameters of inlet and outlet of heat exchangers as enthalpy. The model needs to induce a large number of intermediate parameters to connect the components.…”

Section: Introductionmentioning

confidence: 99%

Simulation and optimization of the waste heat recovery system of the ship power system based on the heat current method

Wei

Qiu

Xiao

et al. 2022

Energy Science & Engineering

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Waste heat recovery technique is of great importance to improve the coefficient and reduce the emission of greenhouse gas for ship power system.This paper builds the model of a waste heat recovery system of single pressure Rankine cycle with heat current method. Combining with the thermoelectrical analogy method, the global heat current model of waste heat recovery system is obtained, which indicates the direction of heat flow, the distribution of thermal resistance and the relationship of temperatures.Applying the law of Kirchhoff builds a mathematical model of a system with no intermediate nodes temperatures. Considering the variation of physical property and distribution of thermal resistance in phase change heat exchanger, a double nested iteration solving algorithm is proposed. The results show that the heat transfer rates of economizer, superheater evaporator, condenser, and steam receivers are 9. 1, 70.42, 143.89, 19.03, 171.98, and 17.28 kW, respectively. With the objective of maximum output of turbine, applying the genetic algorithm obtains the optimal mass flow rate of cycle water, which is 0.53 kg/s and improves the output of turbine from 53.25 to 147.45 kW. Discussions on the optimization model show that decreasing extraction ratio and increasing the mass flow rates of air discharge of compressor will increase the output work of turbine. Both the optimal mass flow rate of cycle water and maximum output work decrease rapidly at first and then change little while the circulation ratio increases. Particularly, the relative variations of mass flow rate and output work are less than 2% while the circulation ratio is larger than 4.

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Utilizing the scavenge air cooling in improving the performance of marine diesel engine waste heat recovery systems

Cited by 41 publications

References 18 publications

Maximizing specific work output extracted from engine exhaust with novel inverted Brayton cycles over a large range of operating conditions

Maximizing specific work output extracted from engine exhaust with novel inverted Brayton cycles over a large range of operating conditions

Thermodynamic analysis of exhaust heat recovery of marine ice using organic rankine cycle

Simulation and optimization of the waste heat recovery system of the ship power system based on the heat current method

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