Heat Transfer Enhancement of Biomass Based Stirling Engine

Rahman, None Nik Kechik Mujahidah Nik Abdul; Saadon, Syamimi; Man, Mohd Hasrizam Che

doi:10.37934/arfmts.100.1.110

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…The CFD model was validated against the experimental model and reveals an average deviation of 6.11 percent. This result demonstrates that the computational model can be used to evaluate the performance of Stirling engines as biomassbased industrial furnaces' waste heat recovery systems for low-grade temperature heat sources [18]. A substantial amount of research on liquid biofuels is devoted to gas turbine technology, which stands to gain the most from these fuels.…”

Section: Introductionmentioning

confidence: 92%

Numerical Investigation and Comparison Between Internal and External Liquid Biofuel Pre-Evaporation in Micro Gas Turbine Chamber

Mohammed R. Abdulwahab,

Khaled Ali Al-attab Al-attab,

Mohamad Yusof Idroas

2023

CFDL

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Due to the current global crises related to fossil fuels (prices up and sources shortage) and in order to diminish the remnants and the negative effects of harmful gas emission (CO and NOx), the fielded researchers and academics try to find alternative source of fossil fuel. Bio fuels consider one of promised source of clean energy. Palm vegetable oil widely separated in Malaysia which considered one of dominant production of this oil globally. Atomization and evaporation radically represent a challenge when using liquid fuel especially fuels with high viscosity and density which is not easy to atomize and evaporate without pre-heating or blende it. A numerical investigation has been proposed to do comparison between two different external evaporative chamber and internal evaporation without using conventional liquid fuel evaporation methods. Findings revealed that both configurations have a good performance in term of emission concentrations and turbine inlet temperature (TIT) which was about 899 C with chamber using internal recycle tube evaporation with CO emission about 183 ppm with outer pre-evaporation chamber. Chamber with internal evaporation was chosen due to technical and fabrication reasons. Besides that, a six different inlet and exhaust ducting ports tested with the chosen chamber with internal recycle tube evaporation chamber, all configurations revealed a non-symmetrical flame flow near chamber exhaust which is not desirable as it will cause turbine unstable operation. The configuration with square duct exhaust was suitable with stable and symmetric flame flow field and slight small CO emission about 312 ppm.

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Section: Introductionmentioning

confidence: 92%

Numerical Investigation and Comparison Between Internal and External Liquid Biofuel Pre-Evaporation in Micro Gas Turbine Chamber

Mohammed R. Abdulwahab,

Khaled Ali Al-attab Al-attab,

Mohamad Yusof Idroas

2023

CFDL

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“…Improving the fuel sprayed leads to completing all the combustion phases, reducing emissions and lowering the specific fuel consumption [20]. In addition, there is a method of raising the CI engines efficiency by increasing the combustion process duration so that more time is available to complete the oxidation process and reduce the emissions level [41]. In this manner, and as observed from Figure 12.…”

Section: Particular Matter (Pm) Emissionmentioning

confidence: 98%

“…The structure of combustion wave propagation in diesel engines consists of fuel, air, and a quantum of heat. These are required to generate the ignition of the compressed air-fuel mixture [41]. CO 2 is one of the products of the combustion process, which gives a clear indication of the completion of fuel combustion.…”

Section: Carbon Dioxidementioning

confidence: 99%

Numerical Investigation of Split Injection Strategies and Injector Nozzle Bore Influence on Combustion and Emissions

Al‐Abboodi

Taher

2023

CFDL

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The power generation mainly depends on fossil diesel fuel, the primary source of harmful emissions and global warming. Therefore, the researcher aims to explore alternative fuels that got greater attention in compression ignition engines. The commercial Diesel-RK software simulates the current numerical study of diesel engine direct injection with speed engine 1500 rpm, compression ratio 17.5, single cylinder, and naturally aspirated. In the basis of the parliamentary research, the literature did not investigate the influence of combustion and emission characteristics of compression ignition engines by using various double and trouble injection strategies along with different injector nozzle bore sizes. Also, the initiative was undertaken to study the effect of the different diesel-biodiesel blends ratio studied, SP20 (80% diesel+20% spirulina), Sp40(60% diesel+40% spirulina), and Sp100(0% diesel +100% spirulina) While the scope of the gap expanded to include a comparison of results with baseline diesel fuel. The results show that MPR increased by 4.2%, maximum gas temperature increased by 8.9%, ignition delay increased by 7.9%, maximum heat release rate decreased by 9.5%, NOx decreased by 7.8%, CO2 decreased by 3.9%, and particularly matter emissions decreased by 6.3% were compared to the double injection scheme , at 0.2 mm(INB)

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CFD Modelling and Optimization of Solid Waste Combustion in a 1 MW Fixed Bed Combustion Chamber

Ahmed,

Pavel,

Rafshan

2024

J. Adv. Res. Numer. Heat Trans.

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The global population and energy consumption grow each year. Therefore, the tendency to use biofuels instead of fossil fuels assist the global requirement. Also, enhancing of the combustion efficiency and minimizing pollutant emissions during the combustion of municipal solid waste (MSW). The present study employed a CFD model to simulate solid fuel combustion in a grate combustion chamber which was commonly used in small-capacity boilers. computational fluid dynamics technique was used to simulate complex solid fuel reactions where 1 MW boiler was supposed for wood and coal combustion. The achievements found that 10%-dried MSW was used as fuel. The results of the study were related to the average gas flow temperatures and composition in the furnace outflow section, as well as the high combustion temperatures of fossil fuels. The results for the average temperature and average chemical molecular fractions (CO, O2, CO2, H2O, and N2) generated at the exit of the combustion process were positive. Thus, it was found that the thermal efficiency of the boiler was significantly affected by the amount of air supplied to the system at a temperature of 273 K and atmospheric pressure. We observed variations in flame morphology, temperature profiles, and corresponding numerical values.

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Heat Transfer Enhancement of Biomass Based Stirling Engine

Cited by 3 publications

References 16 publications

Numerical Investigation and Comparison Between Internal and External Liquid Biofuel Pre-Evaporation in Micro Gas Turbine Chamber

Numerical Investigation and Comparison Between Internal and External Liquid Biofuel Pre-Evaporation in Micro Gas Turbine Chamber

Numerical Investigation of Split Injection Strategies and Injector Nozzle Bore Influence on Combustion and Emissions

CFD Modelling and Optimization of Solid Waste Combustion in a 1 MW Fixed Bed Combustion Chamber

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