Efficiency of hydrogen internal combustion engine combined with open steam Rankine cycle recovering water and waste heat

Yamada, Noboru; Sies, Mohamad Farid

doi:10.1016/j.ijhydene.2009.11.088

Cited by 44 publications

(15 citation statements)

References 25 publications

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“…The measurement is solely based on the normal driving and full throttle driving on the road, resulting both dynamic and transient conditions. The heat energy from exhaust is varies in the range of 500 W up to almost 23 kW, which is a good agreement with [14] where the heat energy is in the range of 5 kW and can reach up to 23 kW. Air flow rate give a significant effect on the heat energy as almost each single data of both parameters are match each other.…”

Section: Figsupporting

confidence: 80%

Study on waste heat recovery from exhaust gas spark ignition (S.I.) engine using steam turbine mechanism

et al. 2016

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Abstract. The issue of global warming has pushed the effort of researchers not only to find alternative renewable energy, but also to improve the machine's energy efficiency. This includes the utilization of waste energy into 'useful energy'. For a vehicle using internal combustion engine (ICE), the waste energy produce by exhaust gas can be utilize to 'useful energy' up to 34%. The energy from the automotive exhaust can be harness by implementing heat pipe heat exchanger in the automotive system. In order to maximize the amount of waste energy that can be turned to 'useful energy', the used of appropriate fluid in the heat exchanger is important. In this study, the fluid used is water, thus converting the fluid into steam and thus drive the turbine that coupling with generator. The paper will explore the performance of a naturally aspirated spark ignition (S.I.) engine equipped with waste heat recovery mechanism (WHRM) that used water as the heat absorption medium. The experimental and simulation test suggest that the concept is thermodynamically feasible and could significantly enhance the system performance depending on the load applied to the engine.

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Section: Figsupporting

confidence: 80%

Study on waste heat recovery from exhaust gas spark ignition (S.I.) engine using steam turbine mechanism

et al. 2016

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“…First, it provides a reasonable solution to produce on-site the necessary hydrogen rate to sustain engine mixed combustion and meanwhile it offers a technical support of the waste heat recovery concept. In the actual case, when proposing to use hydrogen as a supplementary fuel, the costs of hydrogen implementation are likely inferior than in the case of using i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y x x x ( 2 0 1 5 ) 1 e8 hydrogen as primary fuel for fuel-cells operation to electrically supply the power-train system [20]. Starting from the existent test-bed structure, using a normally-aspirated Diesel engine, the proposed model offers an extension to a turbocharged Diesel engine and it consists in the coordination inbetween three distinctive circuits: the water/steam circuit (1), the on-site hydrogen production circuit (2) and the engine air/gas circuit (3) (Fig.…”

Section: Co 2 Emissions Measurementsmentioning

confidence: 99%

On the possibility to reduce CO2 emissions of heat engines fuelled partially with hydrogen produced by waste heat recovery

Chiriac

Racovitza

Podevin

et al. 2015

International Journal of Hydrogen Energy

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“…The theoretical thermal efficiency of the system was 5.19% higher than that of the HCCI engine, while the reduction in CO 2 emission was 4.067%. The wasted heat recovery technology was also applied on a hydrogen-fueled internal combustion engine (HICE) because more heat is wasted by the HICE, and it produces nearly three times more water than a conventional engine [30]. A waste heat recovery sub-system was used to improve the overall thermal efficiency from 27.2% to 33.6% at engine speeds starting from 1500 to 4500 rpm.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Water Injection on the Control of In-Cylinder Pressure and Enhanced Power Output in a Four-Stroke Spark-Ignition Engine

et al. 2016

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This paper presents the results for liquid water injection (WI) into a cylinder during the compression and expansion strokes of an internal combustion engine (ICE), with the aim of achieving an optimal in-cylinder pressure and improving power output using CFD simulation. Employing WI during the compression stroke at 80 • of crank angle (CA) before top dead centre (bTDC) resulted in the reduction of compression work due to a reduction in peak compression pressure by a margin of about 2%. The decreased peak compression pressure also yielded the benefit of a decrease in NOx emission by a margin of 34% as well as the prevention of detonation. Using WI during the expansion stroke (after top dead centre-aTDC) revealed two stages of the in-cylinder pressure: the first stage involved a decrease in pressure by heat absorption, and the second stage involved an increase in the pressure as a result of an increase in the steam volume via expansion. For the case of water addition (WA 3.0%) and a water temperature of 100 • C, the percentage decrease of in-cylinder pressure was 2.7% during the first stage and a 2.5% pressure increase during the second stage. Water injection helped in reducing the energy losses resulting from the transfer of heat to the walls and exhaust gases. At 180 • CA aTDC, the exhaust gas temperature decreased by 42 K, 89 K, and 136 K for WA 1.0, WA 2.0, and WA 3.0, respectively. Increasing the WI temperature to 200 • C resulted in a decrease of the in-cylinder pressure by 1.0% during the first stage, with an increase of approximately 4.0% in the second stage. The use of WI in both compression and expansion strokes resulted in a maximum increase of in-cylinder pressure of about 7%, demonstrating the potential of higher power output.

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Efficiency of hydrogen internal combustion engine combined with open steam Rankine cycle recovering water and waste heat

Cited by 44 publications

References 25 publications

Study on waste heat recovery from exhaust gas spark ignition (S.I.) engine using steam turbine mechanism

Study on waste heat recovery from exhaust gas spark ignition (S.I.) engine using steam turbine mechanism

On the possibility to reduce CO2 emissions of heat engines fuelled partially with hydrogen produced by waste heat recovery

The Effect of Water Injection on the Control of In-Cylinder Pressure and Enhanced Power Output in a Four-Stroke Spark-Ignition Engine

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