HD Diesel engine equipped with a bottoming Rankine cycle as a waste heat recovery system. Part 1: Study and analysis of the waste heat energy

Dolz, V.; Novella, Ricardo; García, Antonio; Sánchez, Jorge

doi:10.1016/j.applthermaleng.2011.10.025

Cited by 184 publications

(85 citation statements)

References 21 publications

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“…Meanwhile, the effective thermal efficiency is only about one third for vehicle engines, and the waste heat is released into the atmosphere through the engine exhaust and engine coolant [1,2]. Therefore, to increase the thermal efficiency and decrease fuel consumption for vehicle engines, the recovery and utilization of waste heat from vehicle engines have recently become a research hotspot for many researchers.…”

Section: Introductionmentioning

confidence: 99%

Parametric Optimization of Regenerative Organic Rankine Cycle System for Diesel Engine Based on Particle Swarm Optimization

et al. 2015

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Abstract:To efficiently recover the waste heat from a diesel engine exhaust, a regenerative organic Rankine cycle (RORC) system was employed, and butane, R124, R416A, and R134a were used as the working fluids. The resulting diesel engine-RORC combined system was defined and the relevant evaluation indexes were proposed. First, the variation tendency of the exhaust energy rate under various diesel engine operating conditions was analyzed using experimental data. The thermodynamic model of the RORC system was established based on the first and second laws of thermodynamics, and the net power output and exergy destruction rate of the RORC system were selected as the objective functions. A particle swarm optimization (PSO) algorithm was used to optimize the operating parameters of the RORC system, including evaporating pressure, intermediate pressure, and degree of superheat. The operating performances of the RORC system and diesel engine-RORC combined system were studied for the four selected working fluids under various operating conditions of the diesel engine. The results show that the operating performances of the RORC system and the combined system using butane are optimal on the basis of optimizing the operating parameters; when the engine speed is 2200 r/min and engine torque is 1215 N·m, the net power output of the RORC OPEN ACCESSEnergies 2015, 8 9752 system using butane is 36.57 kW, and the power output increasing ratio (POIR) of the combined system using butane is 11.56%.

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Section: Introductionmentioning

confidence: 99%

Parametric Optimization of Regenerative Organic Rankine Cycle System for Diesel Engine Based on Particle Swarm Optimization

et al. 2015

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“…Conklin and Szybist (2010) investigated that the percentage of fuel energy converted into useful work only 10.4% and also found that 27.7% energy lost through exhaust pipe. Dolz et al (2012) reported that the value of exhaust gases is 18.6% of total combustion energy. The IC engine waste energy of IC engine can be recovered about 15% by using waste energy harvesting coolant based (weHS c ) and exhaust based (weHS ex ) as an integrated unit (Rahman et al, 2013;2015).…”

Section: Introductionmentioning

confidence: 99%

Physics of ZnO/SiO2 electrolyte semi-conductive thermal electric generator

Rahman¹,

Aung²,

Saifullah³

et al. 2017

Int. j. adv. appl. sci

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Thermoelectric generator generates electrical power from heat based on the temperature gradient. The total energy (fuel) supplied to the engine, approximately 30 to 40% is converted into useful mechanical work, whereas the remaining is expelled to the environment as heat through exhaust gases and cooling systems, resulting in serious greenhouse gas (GHG) emission. The technologies reported on waste heat recovery from exhaust gas of internal combustion engines (ICE) are thermo electric generators (TEG) with finned type, Rankine cycle (RC) and Turbocharger by the different researchers. The deficiency and acclimatization of existing TEG emphasis this study to develop a nanomaterial zinc oxide (ZnO)/Silicon di-oxide (SiO2) electrolyte based semi-conductive thermal electric generator (TEG) to generate electricity from the IC engine exhaust heat. This technology produces electricity from the exhaust heat due to the thermal motion, carrier drift and carrier diffusion. The ZnO/SiO2 simulated result based on the 60% of exhaust heat of IC engine shows that its electrical energy generation is about 80% more than conventional TEG for the exhaust temperature of 500C due to its higher thermal and electric conductivity and higher surface area both in radially and longitudinally. The ZnO/SiO2 electrolyte semiconducive technology develops 524W to 1600W at engine speed 1000 to 5000 rpm, which could contribute to reduce the 10-12% of engine total fuel consumption and improve emission level by 20%.

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“…These waste heat resources include the cylinder glycol (about the 90-105 • C) and diesel exhaust gas (250-450 • C). The conventional method for high-power engine waste heat recovery uses the coolant as the heat energy transfer media, which can reduce the waste heat recovery system complexity and total cost [5,6].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Thermal Hydraulic Performance of Plate-Type Heat Exchanger Applied in Engine Waste Heat Recovery

Dong¹,

Zhang

Wang³

2017

Arab J Sci Eng

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This paper experimentally investigates the thermal hydraulic characteristics for three types of fluid on plate heat exchanger surfaces. The three types of fluid are R245fa, glycol and water. The characteristics of heat transfer coefficient Nu and friction factor f are given. The concept of pump power is provided to overall evaluate the enhanced heat transfer. The dimensionless correlation equations of Nu and f factors are provided using multiple regression method. The mean absolute errors for the Nu and f factor are 9.7 and 6.8% in the whole test range.Keywords Rankine cycle · Plate type · R245fa · Thermal hydraulic · Empirical formula List of symbols

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HD Diesel engine equipped with a bottoming Rankine cycle as a waste heat recovery system. Part 1: Study and analysis of the waste heat energy

Cited by 184 publications

References 21 publications

Parametric Optimization of Regenerative Organic Rankine Cycle System for Diesel Engine Based on Particle Swarm Optimization

Parametric Optimization of Regenerative Organic Rankine Cycle System for Diesel Engine Based on Particle Swarm Optimization

Physics of ZnO/SiO2 electrolyte semi-conductive thermal electric generator

Experimental Study on Thermal Hydraulic Performance of Plate-Type Heat Exchanger Applied in Engine Waste Heat Recovery

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