Single-zone zero-dimensional model study for diesel-fuelled homogeneous charge compression ignition (HCCI) engines using Cantera

Biodiesel is receiving increasing attention as an alternative fuel due to the ever-growing demand for energy. However, the inferior physiochemical properties of biodiesel render it incompatible for gas turbine application, which needs to meet the standard requirement of gas turbine fuel accordance to ASTM D2880. In this quest, the biodiesel-dieselbioethanol blends might be a good option. In this paper, the research work was carried out to study experimentally the performance and exhaust emission characteristics of a 25kW micro gas turbine engine (Capstone Model C30) fuelled with biodiesel-dieselbioethanol blends. The assessment on the improved fuel properties of biodiesel by blending with bio-ethanol had shown more superior atomisation characteristics performance compared to unmodified biodiesel. Moreover, the performance test in the micro gas turbine was limited up to 20% blend of biofuel, which showed improved thermal efficiency during the test. Subsequently, the emission test carried out in this work also showed significant enhancement in emissions, except nitrogen oxides (NOx) which contributed to the higher formation in comparison with the distillate diesel. Finally, B80E20 (80:20 of biodiesel-bioethanol) was proposed to be selected as an ideal blended fuel ratio to be applied in micro gas turbine engine due to its adaptability to replace diesel fuel, while showed better performance and emission properties as compared to the pure petroleum diesel.

Section: Performance and Emission Tests For Micro Gas Turbinementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance and emission characteristics of micro gas turbine engine fuelled with bioethanol-diesel-biodiesel blends

Saifuddin¹,

Refal²,

Palanisamy³

2017

“…Such a model has been developed for diesel [92] and natural gas [93]. One of the major drawbacks of these models is that the underlying assumption of uniform gas temperature reduces the accuracy of prediction of heat release rate, duration of combustion, and emissions.…”

Section: Simulationmentioning

confidence: 99%

A review on the purification and use of biogas in compression ignition engines

Feroskhan¹,

Ismail²

2017

Biogas is commonly produced during the decay of organic matter. It is a mixture of methane and some non-combustible gases such as CO2 and H2S. Its viability as a renewable alternative fuel for internal combustion engines can be enhanced by methane enrichment, i.e. removal of the non-combustible constituents. One of the common techniques for using biogas in a compression ignition (CI) engine is to mix it with air in the intake manifold, induct, and compress this mixture and ignite it by injecting a small quantity of diesel or bio-diesel, which is termed as the pilot fuel. This is known as the dual fuel mode. The pilot fuel is injected close to the end of the compression stroke as in a conventional CI engine and the injected fuel quantity depends on the operating condition. An alternative approach is the Homogeneous Charged Compression Ignition (HCCI) mode. Here, a homogeneous mixture of biogas and air is inducted and compressed by the piston until it auto-ignites. While this concept combines the benefits of spark ignition (SI) and CI engines, the onset of combustion cannot be controlled directly. A detailed review of recent research pertaining to biogas purification techniques and operation of CI engines with biogas in dual fuel and HCCI modes is presented in this paper. The effects of various operating parameters on engine performance and emissions, and comparison with conventional diesel fuelled CI engines are discussed. Biogas improves combustion efficiency, NOx, and smoke emissions. However, it reduces brake thermal efficiency, volumetric efficiency, and increases HC and CO emissions. Biogas fuelling of CI engines is recommended for achieving high diesel substitution, especially under high torque operation.

“…Therefore, there is a need to understand in-cylinder fluid dynamics, since it has been noted to be unsteady, three-dimensional, and turbulent. High-quality mesh and the use of an appropriate valve lift profile are some aspects associated with a predictable flow structure [4]. The design of engine components such as pistons and combustion chambers, contribute to the general efficiency of HCCI engines.…”

Section: Different Types Of Pistons Design As Used In Hcci Enginesmentioning

confidence: 99%

“…However, various challenges limit the successful operation of HCCI engines. These include controlling the combustion phasing, extending the operating range, and the issue of high unburned hydrocarbon and carbon monoxide emissions [4][5][6][7]. Gasoline-based HCCI engines are temporary solutions to the problems of conventional and traditional gasoline engines.…”

Section: Introductionmentioning

confidence: 99%

The use of different types of piston in an HCCI engine: A review

Aljaberi¹,

Hairuddin²,

Aziz³

2017

Self Cite

Homogenous charge compression ignition (HCCI) combines the advantages of spark ignition (SI) and compression ignition (CI) engines to improve fuel consumption and emission levels. HCCI engines have the advantage of relatively higher engine efficiency than SI engines while maintaining lower emissions levels than CI engines. Combustion in HCCI engines occurs spontaneously at any location once the fuel-air mixture reaches its chemical activation energy. Pistons have a major effect on controlling the combustion inside the combustion chamber of an HCCI engine. Many researchers have studied various designs for pistons to improve HCCI engines. The aim of this study is to explore these different types of pistons and their designs in terms of improving the performance of HCCI engines fuelled with gasoline. The most common pistons used in HCCI are twostroke pistons, bowl types, specialised pistons, and dome-shaped pistons; each offers distinct advantages and disadvantages. Software simulation is the latest way of determining the best piston to be used for HCCI engines, as it is more cost effective and less time consuming than experiments. Overall, bowl type pistons offer reduced fuel consumption and a higher load capacity when used in an HCCI engine.