Evaluation of NO  emissions characteristics in a CO2-Free micro-power system by implementing a perforated plate

Cai, Tao; Zhao, Dan; Sun, Yuze; Ni, Siliang; Li, Weixuan; Guan, Di; Wang, Bing

doi:10.1016/j.rser.2021.111150

Cited by 98 publications

(17 citation statements)

References 50 publications

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“…With the increasing energy crisis [46][47][48][49][50] and environmental pollution [51][52][53][54][55][56], the development of a diesel engine is also facing challenges. Nowadays, looking for clean energy and improving the engine to reduce the harm exhaust have become the research focus [57][58][59][60]. In this work, a CFD model was developed and verified in AVL-Fire environment.…”

Section: Discussionmentioning

confidence: 99%

Effects of Different Diesel-Ethanol Dual Fuel Ratio on Performance and Emission Characteristics of Diesel Engine

Zhang

Tian

et al. 2021

Processes

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In this paper, a four-stroke engine diesel was employed to investigate the effects of different fuel mixture ratios of diesel and ethanol on engine performance and emission characteristics in terms of cylinder temperature, heat release rate, brake power, brake thermal efficiency, brake specific fuel consumption, and cylinder pressure. The corresponding simulation model of diesel engine was developed by AVL-Fire coupled CHEMKIN code, and an improved chemical kinetics mechanism containing 34 reactions and 19 species was employed to simulate the fuel spray process and combustion process. The simulation model was validated by experimental results under 100% and 50% load conditions and used to simulate the combustion process of diesel engine fueled with pure diesel and diesel–ethanol blends with 10%, 20%, and 30% ethanol by volume, respectively. The results showed that the increase of ethanol content in the blended fuel had a certain negative impact on the performance characteristic of diesel engine and significantly improved the emission characteristic of the engine. With the ethanol proportion in the blended fuel increased to 10%, 20%, and 30%, the brake thermal efficiency of the engine increased by 2.24%, 4.33%, and 6.37% respectively. However, the brake-specific fuel consumption increased by 1.56%, 3.49%, and 5.74% and the power decreased by 1.58%, 3.46%, and 5.54% respectively. In addition, with the ethanol proportion in the blended fuel increased to 10%, 20%, and 30%, the carbon monoxide emission decreased by 34.69%, 47.60%, and 56.58%, and the soot emission decreased by 7.83%, 15.24%, and 22.52% respectively. Finally, based on the combining fuzzy and grey correlation theory, nitrogen oxide emission has the highest correlation with engine power and brake-specific fuel consumption. The values reach 0.9103 and 0.8945 respectively. It shows that nitrogen oxide emission and cylinder pressure have a significant relationship on engine power and brake-specific fuel consumption.

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Section: Discussionmentioning

confidence: 99%

Effects of Different Diesel-Ethanol Dual Fuel Ratio on Performance and Emission Characteristics of Diesel Engine

Zhang

Tian

et al. 2021

Processes

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“…The supercritical carbon dioxide (s-CO 2 ) Brayton cycle is considered one of the most promising thermal power generation cycles nowadays due to the fact of its advantages over others including simplicity, compactness, good stability, improved safety, etc. [16,17]. Several layouts of the s-CO 2 cycle were developed including the simple cycle, the recompression cycle, and the preheating cycle.…”

Section: Applications Of Splitting Methods In the Exergy Analysis Of The Supercritical Co 2 Cycle 41 Simulation Of The Supercritical Co 2mentioning

confidence: 99%

“…Can work in direct way e D + e A + e I Can work in indirect way (16) It has been established that for thermal power cycles, such as the Brayton cycle, only the e D and the e A can drive turbines working. In other words, the increment in the e D and the e A plays a dominating role in increasing the working ability of the working fluid.…”

Section: Splitting Principles and Potential Applicationmentioning

confidence: 99%

Splitting Physical Exergy by Its Feasible Working Ways

et al. 2021

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This paper analyzed the problems associated with physical exergy splitting, and based on this, presented a new splitting method. This new method splits the physical exergy into three parts according to the feasible working ways, i.e.,: the direct, indirect, and adaptive exergy. The computational method and the physical meaning of the three exergy parts were presented in detail in terms of graphic representation and mathematical derivation. Then, it was applied to the exergy analysis of a thermal power cycle. The results show that compared with the conventional method which splits the physical exergy into thermal and mechanical parts, the current exergy splitting method can better represent the change rule of the working ability of the real working stream in the cycle and the influence of some operation parameters, such as the turbine inlet temperature, on the real working ability. The study suggests that the new method can make the exergy analysis more helpful and guidable in its applications.

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“…It can be found that the system has six individual silicon layers and incudes the housing, combustor, and turbine, all being made of silicon. Another common micro engine system is the micro-rotary engine (see Figure 2b) [9]. The engine displacement is 0.064 mm 3 and the micro engine system with a 1 mm rotor can produce a power of 13.9 W when the speed is 30,000 rpm.…”

Section: Micro Engine Systemmentioning

confidence: 99%

Effect of Different Technologies on Performance Enhancement of the Micro-Combustor for the Micro Thermophotovoltaic Application: A Review

et al. 2021

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With the improvement and development of micro-mechanical manufacturing technology, people can produce an increasing variety of micro-electromechanical systems in recent years, such as micro-satellite thrusters, micro-sensors, micro-aircrafts, micro-medical devices, micro-pumps, and micro-motors. At present, these micro-mechatronic systems are driven by traditional energy power systems, but these traditional energy power systems have such disadvantages as short endurance time, large size, and low energy density. Therefore, efforts were made to study micro-energy dynamical systems with small size, light gravity, high density and energy, and long duration so as to provide continuous and reliable power for these systems. In general, the micro-thermal photoelectric system not only has a simple structure, but also no moving parts. The micro-thermal photoelectric system is a micro-energy power system with good application prospects at present. However, as one of the most important structural components of micro-thermal photoelectric systems, the microburner, is the key to realize the conversion of fuel chemical energy to electric energy in micro-thermal photoelectric system. The studies of how to improve the flame stability and combustion efficiency are very necessary and interesting. Thus, some methods to improve the performance of micro-burners were introduced and summarized systematically, hoping to bring some convenience to researchers in the field.

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Evaluation of NO emissions characteristics in a CO2-Free micro-power system by implementing a perforated plate

Cited by 98 publications

References 50 publications

Effects of Different Diesel-Ethanol Dual Fuel Ratio on Performance and Emission Characteristics of Diesel Engine

Effects of Different Diesel-Ethanol Dual Fuel Ratio on Performance and Emission Characteristics of Diesel Engine

Splitting Physical Exergy by Its Feasible Working Ways

Effect of Different Technologies on Performance Enhancement of the Micro-Combustor for the Micro Thermophotovoltaic Application: A Review

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