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Journal articles on the topic 'Exhaust'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Siregar, Ahmad Marabdi, Chandra A. Siregar, and Khairul Umurani. "Utilization and Experimental Use of Stainless Steel Metal Scrap Machinery Waste, St-40 Iron, Copper and Aluminum to Reduce Co, Hc, Co2 Elements in Vehicle Exhaust." Jurnal Pendidikan Vokasi Otomotif 6, no. 2 (2024): 147–58. http://dx.doi.org/10.21831/jpvo.v6i2.73269.

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Air pollution due to motor vehicle exhaust emissions is increased. Polluted air harms human health dan the environment. Consequently, it is essential to make a sustained effort to reduce air pollution. The purpose of this research is to investigate the effect of adding aluminum scrap to the exhaust system of a motor vehicle on gas emissions composition. The motor vehicle exhaust system was modified to accommodate aluminum scrap placement. A gas analyzer was utilized to observe exhaust gas composition, such as carbon dioxide, hydrocarbon, and carbon monoxide. Aluminum scrap with different masse

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2

Khoirul huda, Kriswanto, Abdurrahman, et al. "ANALYSIS OF EXHAUST EMISSIONS, NOISE, AND PERFORMANCE OF A 110CC MOTORCYCLE USING A PERFORATED-CLOSE CONICAL SILENCER MUFFLER." Jurnal Pendidikan Teknik Mesin 25, no. 1 (2025): 28–35. https://doi.org/10.15294/jptm.v25i1.24983.

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This paper analyzes the exhaust emission, noise, and performance of 110cc motorcycles experimentally through PCCS exhausts compared to standard exhausts. This study adopts an experimental method involving three tests: exhaust emission testing based on the SNI 09-7118.1-2005 standard, noise measurement using the static test procedure according to the UN-R 41-04 standard, and performance evaluation conducted with an inertial dynamometer. Implementing the PCCS exhaust system on a 110 cc automatic motorcycle positively impacts exhaust emissions, noise levels, and engine performance. Compared to th

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Nasir, M., Yori Syaida, Rifdarmon Rifdarmon, and Wagino Wagino. "Perbandingan Jenis Knalpot Standar Dengan Knalpot Racing Terhadap Back pressure, Temperature, Dan Suara Pada Sepeda Motor 4 Tak." JTPVI: Jurnal Teknologi dan Pendidikan Vokasi Indonesia 1, no. 1 (2023): 27–36. http://dx.doi.org/10.24036/jtpvi.v1i1.4.

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Banyaknya masyarakat yang mengganti knalpot standar dengan knalpot racing, Agar menambah akselerasi dan performa pada sepeda motor mereka. Hasil pengujian perbandingan knalpot standar dengan knalpot racing terhadap Back Pressure. Pada penggunaan knalpot standar hasil nya 6,3 Psi, Apabila Rpm semakin besar, sama besar nya back pressure yang dikeluarkan. sedangkan penggunaan knalpot racing hasilnya 1,5 Psi. Semakin besar Rpm, semakin kecil back pressure yang di keluarkan. Untuk perbandingan knalpot standar hasilnya 95,76℃ sedangkan knalpot racing hasilnya 113,23℃ terhadap temperature. Pada pengg

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Phan, T. D., J. F. Drake, D. Larson, et al. "Multiple Subscale Magnetic Reconnection Embedded inside a Heliospheric Current Sheet Reconnection Exhaust: Evidence for Flux Rope Merging." Astrophysical Journal Letters 971, no. 2 (2024): L42. http://dx.doi.org/10.3847/2041-8213/ad6841.

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Abstract We report observations of multiple subscale reconnecting current sheets embedded inside a large-scale heliospheric current sheet (HCS) reconnection exhaust. The discovery was made possible by the unusual skimming trajectory of Parker Solar Probe through a sunward-directed HCS exhaust, sampling structures convecting with the exhaust outflows for more than 3 hr during Encounter 14, at a radial distance of ∼17 solar radii. A large number of subscale current sheets (SCSs) were detected inside the HCS exhaust. Remarkably, five SCSs showed direct evidence for reconnection, displaying near-A

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Wibowo, Trio Nur, Nugrah Rekto Prabowo, and Dwi Purwanto. "Analisis Penggunaan Knalpot Racing Slip-On Dan Knalpot Racing Full System Terhadap Performa Mesin Pada Motor 150 CC." Proceedings Series on Physical & Formal Sciences 6 (October 13, 2023): 213–17. http://dx.doi.org/10.30595/pspfs.v6i.872.

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One way to improve the performance of an engine without dismantling the original engine is to modify the exhaust pipe, which is commonly called the exhaust. Here we use 4 types of exhaust, namely factory standard exhaust, slip-on exhaust (standard header-modified muffler), slip-on (modified header-standard muffler), and full system exhaust that we take from the market. This study aims to test the performance of the motor which consists of torque, power, and exhaust emissions (CO and HC levels) from the four types of exhausts, using a dynamometer to determine torque and power, an emission gas a

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Ellyanie, Ellyanie, and Devan Oktabri H. "THE EFFECT OF BRASS (Cu-Zn) CATALYTIC CONVERTER ENGINE PERFORMANCE." Indonesian Journal of Engineering and Science 2, no. 2 (2021): 035–43. http://dx.doi.org/10.51630/ijes.v2i2.20.

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Installing a catalytic converter in the exhaust is a typical method of reducing engine exhaust emissions. Catalytic converters have been shown to lower exhaust pollutants while enhancing engine performance. The influence of the number of brass catalyst plates (Cu-Zn) on the Performance of the commercial Yamaha Jupiter MX motorcycle engine manufactured in 2007 was investigated in this study. The catalyst is installed in the motorbike exhaust, with the number of catalyst plates varying between 5 and 8, and a conventional uncatalyzed exhaust serving as a comparison. Torque, power, specific fuel c

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7

Shi, Wei, and Fu Sheng Gao. "Simulation of Smoke Movement in a Loop Corridor under Mechanical Exhaust with Compound Model." Applied Mechanics and Materials 475-476 (December 2013): 1459–62. http://dx.doi.org/10.4028/www.scientific.net/amm.475-476.1459.

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The mechanical smoke exhaust is as acknowledged as an effective smoke control manner by making use of some necessary exhaust facilities, also with more stability than natural exhaust. In this paper, the field model FDS (Fire Dynamic Simulator) with a combination of zone model CFAST (Consolidate Fire and Smoke Transport) were used to simulate the mechanical smoke exhaust in a loop corridor of the fire floor in a high-rise hotel, for the propose of evaluate fire safety of mechanical smoke exhaust. The mainly discussion was about the height of layer interface with the ceiling height changed, also

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8

Rido Rudiansyah, Mohamad, Huddan Rahman, Epul Saepul Rohman, Fathur Rohman, and Dani Mardiyana. "The effect of use of tzm racing exhaust on exhaust emissions and noise on Nmax motorcycles." BIO Web of Conferences 148 (2024): 02027. https://doi.org/10.1051/bioconf/202414802027.

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The Yamaha Nmax is one of the motorbikes that is often used to experience modification racing exhaust. However Thus, impact modification racing exhaust against exhaust emissions and levels noise can cause motorbikes don’t fulfil applicable rules. Study This use method experiment with variable Bound that is level ex-haust emissions (CO, HC, NOx) and levels noise (dB). Fuel used that is Pertamax RON 92. Test results exhaust standard Yamaha Nmax meets emission and noise limits permitted by regulations government. CO emissions are 2.22642 g/kWh and HC are 0.4585 g/kWh, and noise of 72.72 dBa. In c

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9

Yu, Xuehui, Chao Wang, Xue Cui, Jinxin Han, and Xiaolin Sun. "Study on Smoke Spreading Characteristics of Highway Tunnel Fire." Journal of Physics: Conference Series 2694, no. 1 (2024): 012008. http://dx.doi.org/10.1088/1742-6596/2694/1/012008.

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Abstract In the event of a fire in a road tunnel, the effect of natural smoke exhaust alone is far inferior to that of mechanical smoke exhaust. Study of the characteristics of the flux of smoke gases inside the tunnel with the use of mechanical exhausts in case of sudden fire in road tunnels by means of specific model simulation methods, specific analysis by setting fixed exhaust spacing and different emission volumes, and the addition of fine water mist is studied. The results show that: when the exhaust vent spacing is 30m, the smoke exhaust volume in 30m³/s, 40m³/s, 50m³/s mechanical smoke

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10

Shi, Wei, and Fu Sheng Gao. "Simulation and Analyzing of Mechanical Smoke Exhaust in a High-Rise Building." Advanced Materials Research 726-731 (August 2013): 3596–99. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.3596.

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The mechanical smoke exhaust is as acknowledged as an effective smoke control manner by making use of some necessary exhaust facilities. In this paper, a field model with a combination of a zone model were used to simulate the mechanical smoke exhaust in a loop corridor of the fire floor in a high-rise hotel, for the propose of evaluate fire safety of mechanical smoke exhaust. There were several factors are under discussion, as the arrangement of smoke vents, quantity of smoke vents, the volume of smoke exhaust, the position of the smoke vents and height of ceiling indoor, et al. The conclusio

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Villa Caro, Raúl, Rodrigo Pérez Fernández, Julio M. Pernas Urrutia, and Filiberto Hernandez. "METHODOLOGY APPLIED TO STUDY WATER MIST AS AN INFRARED SIGNATURE SUPPRESSOR IN MARINE GAS TURBINES." International Journal of Maritime Engineering 165, A1 (2023): 43–54. http://dx.doi.org/10.5750/ijme.v165ia1.815.

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This paper proposes a methodology for the reduction of marine gas turbine exhaust gas temperatures via water mist injection into exhaust gas ducts with the aim of reducing a ship’s infrared (IR) signature. Due to the difficulty of conducting live experimental tests on warships, Computational Fluid Dynamic (CFD) techniques can be employed to predict phase interaction behaviour (water mist and exhaust gases) within gas turbine exhausts. CFD techniques attempt to find numerical solutions to the equations that govern phase interaction phenomena through the setting and resolution of mathematical mo

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Shi, Youzhi, Shixiong Qian, Pengju Zhao, Pan Guo, and Zihe Gao. "Influence of Smoke Exhaust Volume and Smoke Vent Layout on the Ceiling Centralized Smoke Exhaust Effect in Tunnel Fires." Fire 7, no. 3 (2024): 78. http://dx.doi.org/10.3390/fire7030078.

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This research focuses on the impact of smoke exhaust volume and smoke vent layout, which are two crucial factors affecting the smoke control efficiency in tunnels, on the smoke exhaust effect in tunnel fires. Numerical simulation methods are employed to investigate the impact of changing the smoke exhaust volume and the smoke vent number on the smoke exhaust performance in a curved tunnel with a ceiling centralized smoke exhaust system. This research primarily examines the length of the smoke distribution, the smoke temperature under the ceiling, the vertical visibility, and the exhausted smok

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Mui, KW, LT Wong, HC Yu, CT Cheung, and N. Li. "Exhaust ventilation performance in residential washrooms for bioaerosol particle removal after water closet flushing." Building Services Engineering Research and Technology 38, no. 1 (2016): 32–46. http://dx.doi.org/10.1177/0143624416660597.

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Potential bioaerosol infection risk associated with toilet flushing has not been sufficiently addressed in the design of residential washroom exhaust system. This study evaluates the performance of exhaust ventilation for residential washrooms in terms of air change rate, washroom size, washroom geometry, and locations of door louver, exhaust and water closet. Three bioaerosol species namely Escherichia coli (ATCC 10536), Serratia marcescens (ATCC 6911), and Cladosporium cladosporioides (ATCC 16022) are included in the simulations. By shortening the distance between the locations of exhaust an

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Cho, Sung-Woo, and Byung-Hyun Lee. "Exhaust Smoke Validity of Vertical Shaft in Restrooms using the Stack Effect." Fire Science and Engineering 36, no. 6 (2022): 101–6. http://dx.doi.org/10.7731/kifse.befa5ca1.

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This study is performed to validate a quantitative relationship between the exhaust rate through vertical shaft, which are used for restroom ventilation, and smoke generation based on NFSC 501. The exhaust rate is calculated using heat balance equations and is based on the input and exhaust air temperatures. The neutral plan in the vertical shaft was formed at approximately 46% of the total height. Because the smoke that is exhausted through the vertical shaft is more than 20% of the minimum smoke generation suggested by NFSC 501, the smoke exhaust through the vertical shaft is considered to b

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Palmiste, Ülar, Jarek Kurnitski, and Hendrik Voll. "Design criteria for outdoor air intakes and exhaust air outlets located on an external wall." E3S Web of Conferences 172 (2020): 09008. http://dx.doi.org/10.1051/e3sconf/202017209008.

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Optimal placement of outdoor air intakes and exhaust outlets is a source control measure to avoid the degradation of air quality at the air intakes. Re-entrainment is an occasional air pollution instance that happens if pollutants in the exhaust air stream, after being discharged to outdoors, are transferred back to outdoor air intake location due to unfavorable meteorological conditions and inadequate positioning of the air intakes and exhaust outlets. In engineering practice, it is impractical to always conduct detailed dispersion modeling due to the complexity of airflow phenomena in the ur

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AMOS, T., L. APPLEBY, and K. KIERNAN. "Changes in rates of suicide by car exhaust asphyxiation in England and Wales." Psychological Medicine 31, no. 5 (2001): 935–39. http://dx.doi.org/10.1017/s0033291701003920.

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Background. Self-asphyxiation using car exhaust gas is a common method of suicide in England and Wales, particularly in young males. The introduction of catalytic converters has reduced the toxicity of car exhausts. The main aims of the study were: to seek evidence of a fall in car exhaust suicides in the general population and in age and gender groups; to relate any fall to changes in car exhaust systems, particularly since legislation on car exhaust emissions in 1993; and to examine rates of suicide by other methods for evidence of method substitution.Methods. Population study in England and

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Nasir, M., Hannyka Febriano, and Balisranislam Balisranislam. "Effect of the Using of Racing Exhaust with variation Soundproofing Material Against Exhaust Emissions and Noise on 4 Stroke Motorcycle." MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering 3, no. 3 (2021): 135–42. http://dx.doi.org/10.46574/motivection.v3i3.95.

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This study discusses the effect of using a racing exhaust with asbestos and stainless steel-based filters. The purpose of this study is to find out how big the role of racing exhaust filters in reducing noise and exhaust emissions. This study uses an experimental method with the static comparison design. The object of this research is Honda Beat injection motorcycle 2017. The data from this study were taken from testing standard exhaust, stainless steel, and asbestos. Based on the research that has been done, it can be concluded that the use of stainless steel-based filters is effective in red

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Li, Jin Mei, Qiang Li, Jia Qing Zhang, and Chang Hai Li. "Numerical Simulation of Smoke Exhausts Function of Roof Vent in Compartment Fires." Applied Mechanics and Materials 224 (November 2012): 418–21. http://dx.doi.org/10.4028/www.scientific.net/amm.224.418.

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The influence of roof vent area and fire source area on smoke exhaust function of roof vent is provided in this paper. Numerical simulation results show that the temperature of hot smoke layer increases with the increases of heat release rate and decreases as the roof vent area increases. For the evaluation criterion with temperature difference, with the increase in roof vent area and fire source area, the smoke exhausts function of roof vent was enhanced. But for the evaluation criterion with efficiency of smoke exhaust, the smoke exhaust efficiency increases as the roof vent area increase an

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Tumigolung, Stefanny Stevie, Danu Sudrajat, and Iwan Susanto. "Redesign of 13 HP Pakura Boat Engine Exhaust to Reduce Noise Levels." Jurnal Kelautan dan Perikanan Terapan (JKPT) 6, no. 1 (2023): 41. http://dx.doi.org/10.15578/jkpt.v6i1.12065.

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The hearing level of fishermen in the Lembeh Strait out of 11 fishermen, there are only 2 fishermen whose hearing is still normal. This is likely the effect of a plain exhaust modification and does not use a muffler. The muffler acts as a sound transmission damper when the exhaust gases exit the engine. The objectives of this study are as follows: 1) redesign of the engine exhaust of the pakura boat; 2) analyze the relationship and influence of rotation per minute with laboratory-scale noise levels; and 3) analyze the relationship and influence of rotation per minute with field-scale noise lev

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Narendo, Virgiawan Moro. "Analisis Undang-Undang Lalu Lintas Terhadap Maraknya Penggunaan Knalpot Brong dan Tingkat Kepatuhan Masyarakat Purbalingga." Proceedings Series on Social Sciences & Humanities 17 (July 30, 2024): 262–68. http://dx.doi.org/10.30595/pssh.v17i.1148.

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Doing modifications to a vehicles has become a common thing for people to do, one of the modifications is changing the standard exhaust to a loud exhaust. In fact, the use of exhausts that exceed the sound threshold has been regulated in Law Number 22 of 2009 concerning Road Traffic and Transportation. Based on that information, this research will discuss law enforcement for loud exhaust users from the Purbalingga Police Traffic Unit and the obstacles in enforcing these regulations. This research was conducted using a juridical-empirical method by conducting observations and interviews with re

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Wang, Yong, Mingliang Chang, Long Chen, Shouxi Wang, Shihao Fan, and Dongyang Hua. "Evaluation of Prediction Models for the Physical Properties in Fire-Flooding Exhaust Reinjection Process." Energies 15, no. 2 (2022): 562. http://dx.doi.org/10.3390/en15020562.

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The reinjection of the fire-flooding exhaust is a novel disposal process for handling the exhaust produced by the in-situ combustion technology. For reasonable process design and safe operation, it is of great significance to select an optimum property calculation method for the fire-flooding exhaust. However, due to the compositional particularity and the wide range of operating parameters during reinjection, the state equations in predicting the exhaust properties over the wide range of operating parameters have not been studied clearly yet. Hence, this paper investigates the applicability o

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Mara, I. M., I. B. Alit, I. G. B. Susana, and I. M. Nuarsa. "Aplikasi medan magnet pada saluran bahan bakar sepeda motor untuk penghematan konsumsi bahan bakar dan penurunan emisi gas buang." Dinamika Teknik Mesin 12, no. 1 (2022): 45. http://dx.doi.org/10.29303/dtm.v12i1.500.

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Reducing fuel consumption and improving fuel quality in motorcycle engines are very important in order to make the exhaust gas emission from the engine becomes more environmentally friendly. In this study, a magnetic field is attached to the fuel line so that the fuel is affected by the magnetic field. The magnetic field is obtained from electromagnetic magnets and permanent magnets. Fuel consumption is tested on a motorcycle engine that it uses a carburetor system and on an engine that uses a fuel injection system. The exhaust emissions observed were CO and HC by using exhaust gas analyzer. T

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Mara, I. Made, and I. Made Nuarsa. "Aplikasi medan magnet pada saluran bahan bakar sepeda motor." Jurnal Energi Dan Manufaktur 14, no. 2 (2022): 44. http://dx.doi.org/10.24843/jem.2021.v14.i02.p02.

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Reducing fuel consumption and improving fuel quality in motorcycle engines are very important in order to make the exhaust gas emission from the engine becomes more environmentally friendly. In this study, a magnetic field is attached to the fuel line so that the fuel is affected by the magnetic field. The magnetic field is obtained from electromagnetic magnets and permanent magnets. Fuel consumption is tested on a motorcycle engine that it uses a carburetor system and on an engine that uses a fuel injection system. The exhaust emissions observed were CO and HC by using exhaust gas analyzer. T

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Kwon, Yong-Il. "A Study on the Ventilation Efficiency Improved by Airflow Characteristics of the Axial Fan Installed in Parallel at the Side Wall of the Narrow Exhaust Tower." International Journal of Air-Conditioning and Refrigeration 24, no. 04 (2016): 1650026. http://dx.doi.org/10.1142/s2010132516500267.

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A numerical study has been conducted to simulate airflow and ventilation characteristics in the exhaust tower installed to ventilation of the multi-story underground parking lot. It is the objective of the present study to identify ventilation problems and to suggest the flow direction modifications of the ventilation system with the axial fan to improve ventilation efficiency in the low-rise section of the exhaust tower. Numerical results on SVE4 (scale of ventilation efficiency NO.4) and local mean age of exhaust ports are presented along with the location of axial fan on the direction of sw

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Liang, S. M., and C. J. Wang. "Experimental and Numerical Study on a Straight Exhaust Pipe." Journal of Mechanics 27, no. 4 (2011): 597–605. http://dx.doi.org/10.1017/jmech.2011.62.

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ABSTRACTIn this study, radiated noise is investigated by experimental and numerical methods for a straight exhaust pipe of diameter 23mm that replaces the original exhaust pipe of a motorcycle of EZ 125cc provided by Kwang Yang Motor Co. In experiment, temperature, pressure and flow speed of the exhausted gas have been measured for different engine speeds ranging from 3000-5000rpm without loading. Sound pressure levels (SPL) at a distance of 0.5m from the exhaust pipe exit for different inclination angles (0° ∼ 90°) were recorded and compared with the result of simulation. In numerical simulat

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Chen, Meng, and Li Sheng Jin. "Application of Nano-TiO₂ Photocatalysis Technology in Purification Exhaust." Advanced Materials Research 575 (October 2012): 64–69. http://dx.doi.org/10.4028/www.scientific.net/amr.575.64.

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The great development of transportation system has brought significant effect to the world environment, and people have paid more and more attention to the pollution of the exhausts from vehicles. In recent years, the photocatalytic technique of nanosized TiO2 has been a new technique in automobile exhaust treatment. Based on the mechanism of TiO2 photocatalytic reaction, the paper focus on in-engines and out-engines purification technique and applications about automobile exhaust. At last, limitations and the future development trend in practice is also discussed.

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Gao, Zihe, Pengju Zhao, Zhaoguo Wu, Jiajun Cai, and Linjie Li. "Study on the Natural Smoke Exhaust Performance of Board-Coupled Vertical Shaft in High-Altitude Tunnel Fires." Fire 7, no. 8 (2024): 274. http://dx.doi.org/10.3390/fire7080274.

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Vertical shaft natural ventilation is a common smoke exhaust method in highway tunnel fires. This study investigated the vertical shaft natural smoke exhaust work in highway tunnel fires with the effect of multiple factors through numerical simulation. Using the analysis of the flow field of smoke in nearby areas of the vertical shaft and the quantitative calculation of the gas exhausted through the vertical shaft, considering the impact of shaft division and board height, an optimal vertical shaft arrangement was proposed, and the working conditions of this arrangement in low-pressure environ

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Logachev, Konstantin, Arslan Ziganshin, Yanqiu Huang, et al. "Development of a method for numerical modeling of the separation flow at the entrance to a rectangular exhaust channel with sharp edges." E3S Web of Conferences 356 (2022): 01014. http://dx.doi.org/10.1051/e3sconf/202235601014.

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We have developed a method for mathematically simulating flow separation at the entrance to the exhaust channels of rectangular shape, using stationary discrete vortices in an ideal incompressible liquid in full spatial setting. When designing the discrete model, straight and curvilinear quadrangular vortex frames, straight and curvilinear horseshoe-shaped vortices were used. Using the developed computational procedure and computer program, the outline of vortex zone at the entry to the rectangular exhaust channel with sharp edges and the axial velocity of the air flow are determined. The resu

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Akbar Ramadhan Firman Al Abrari and Listiyono Listiyono. "Analisa Pengaruh Katalis Terhadap Gas Buang Pada Kendaraan Roda 2." Venus: Jurnal Publikasi Rumpun Ilmu Teknik 2, no. 4 (2024): 01–13. http://dx.doi.org/10.61132/venus.v2i4.375.

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The impact of the increase in motorized vehicles is air pollution from vehicle exhausts. Exhaust gas is a polluting substance that pollutes the air where the gas is created from exhaust gas or gas from the combustion of vehicles. One alternative way to reduce the content of harmful exhaust gases such as carbon monoxide (CO), and hydrocarbons (HC) produced by motorized vehicles is by adding a catalytic converter. In this study, the catalytic converter uses Aluminum (Al), Brass (Cu-Zn), and Copper (Cu) materials. The purpose of this study is to analyze the effect of using a catalytic converter m

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Erickson, M. H., M. Gueneron, and B. T. Jobson. "Measuring long chain alkanes in diesel engine exhaust by thermal desorption PTR-MS." Atmospheric Measurement Techniques Discussions 6, no. 4 (2013): 6005–46. http://dx.doi.org/10.5194/amtd-6-6005-2013.

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Abstract. A method using thermal desorption sampling and analysis by PTR-MS to measure long chain alkanes (C12-C18) and other larger organics associated with diesel engine exhaust emissions is described. Long chain alkanes undergo dissociative proton transfer reactions forming a series of fragment ions with formula CnH2n+1. The PTR-MS is insensitive to n-alkanes less than C8 but displays an increasing sensitivity for larger alkanes. Fragment ion distribution and sensitivity is a function of drift conditions. At 80 Td the most abundant ion fragments from C10 to C16 n-alkanes were m/z 57, 71 and

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Eriksson, Stefan, Marc Swisdak, James M. Weygand, et al. "Characteristics of Multi-scale Current Sheets in the Solar Wind at 1 au Associated with Magnetic Reconnection and the Case for a Heliospheric Current Sheet Avalanche." Astrophysical Journal 933, no. 2 (2022): 181. http://dx.doi.org/10.3847/1538-4357/ac73f6.

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Abstract Wind spacecraft measurements are analyzed to obtain a current sheet (CS) normal width d cs distribution of 3374 confirmed magnetic reconnection exhausts in the ecliptic plane of the solar wind at 1 au. The d cs distribution displays a nearly exponential decay from a peak at d cs = 25 d i to a median at d cs = 85 d i and a 95th percentile at d cs = 905 d i with a maximum exhaust width at d cs = 8077 d i . A magnetic field θ-rotation angle distribution increases linearly from a relatively few high-shear events toward a broad peak at 35° < θ < 65°. The azimuthal ϕ angles of the CS

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Lemieux, Joanie, Florent Rossi, Asmaâ Khalloufi, et al. "Fan Exhaust Air Sampling of Livestock Operations as a Proxy for Indoor Bioaerosol Monitoring." Journal of Agricultural Safety and Health 31, no. 2 (2025): 121–32. https://doi.org/10.13031/jash.16127.

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HighlightsFan exhaust air sampling is a reliable monitoring proxy for indoor bioaerosols from livestock operations.Air samples collected indoors and at fan exhaust have highly similar bacterial diversity.At low indoor concentrations, specific microbial markers are still detectable in the air collected at the fan exhaust.Abstract. The incidence ofanimal and zoonotic diseases is expected to increase in the coming years, imposing the reinforcement of biosecurity measures for livestock operations. Airborne transmission of certain infectious agents underscores the importance of surveilling bioaeros

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Lutic, Doina, Joakim Pagels, Robert Bjorklund, et al. "Detection of Soot Using a Resistivity Sensor Device Employing Thermophoretic Particle Deposition." Journal of Sensors 2010 (2010): 1–6. http://dx.doi.org/10.1155/2010/421072.

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Results are reported for thermophoretic deposition of soot particles on resistivity sensors as a monitoring technique for diesel exhaust particles with the potential of improved detection limit and sensitivity. Soot with similar characteristics as from diesel exhausts was generated by a propane flame and diluted in stages. The soot in a gas flow at 240–270C∘was collected on an interdigitated electrode structure held at a considerably lower temperature, 105–125C∘. The time delay for reaching measurable resistance values, the subsequent rate, and magnitude of resistance decrease were a function

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Nugraha, Ata Syifa’, Muhammad Tegar Jaya Pangestu, and Sudirman Rizki Ariyanto. "STUDI PERBANDINGAN PENGGUNAAN CATALYTIC CONVERTER LOGAM ALTERNATIF PADA TINGKAT KEBISINGAN SEPEDA MOTOR EMPAT LANGKAH." Steam Engineering 6, no. 2 (2025): 95–103. https://doi.org/10.37304/jptm.v6i2.19616.

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The growth of motor vehicles in Indonesia, particularly motorcycles, is increasing rapidly. This rise contributes to environmental issues, especially noise pollution, which is caused by the disturbance from vehicle sounds. A catalytic converter, installed in vehicle exhaust systems, reduces harmful emissions but also affects noise levels. This study examines the impact of a nickel-coated copper catalytic converter on motorcycle noise. The research is experimental, comparing the noise produced by a standard exhaust with two experimental exhaust systems fitted with catalytic converters. The stud

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Tan, Yinjun, Keli Wang, Zhiqiang Zhang, Zeyi Lu, and Heng Zhang. "Study on the Effect of Natural Wind on the Smoke Spread Law of Extra-Long Tunnel Fires with Inclined Shafts for Air Supply and Exhaust." Buildings 14, no. 6 (2024): 1516. http://dx.doi.org/10.3390/buildings14061516.

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High-temperature smoke generated by tunnel fires is the most important factor causing casualties. To explore the influence of natural wind on fire smoke movement in an extra-long highway tunnel based on the Taihang Mountain Tunnel, the distribution law of natural wind in the tunnel was obtained by on-site monitoring of the meteorological conditions at the tunnel site. A three-dimensional fire dynamics tunnel model considering an inclined shaft smoke exhaust was established, and the influence of natural wind on tunnel temperature distribution, smoke spread and smoke exhaust efficiency was studi

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Damm, Christopher J., Donald Lucas, Robert F. Sawyer, and Catherine P. Koshland. "Real-Time Measurement of Combustion Generated Particles with Photofragmentation-Fluorescence." Applied Spectroscopy 55, no. 11 (2001): 1478–82. http://dx.doi.org/10.1366/0003702011953892.

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Excimer laser fragmentation-fluorescence spectroscopy (ELFFS) is a viable technique for real-time monitoring of carbonaceous particles in combustion exhausts. The exhaust from a single-cylinder two-stroke engine is diluted and diverted into the laser interrogation region, resulting in a particle concentration of approximately 1 × 107/cm3. Light from a 193 nm ArF laser photofragments the particles and then produces fluorescence from the atomic carbon fragments at 248 nm, CH fragments at 431 nm, and C2 fragments at 468 nm. The atomic carbon fluorescence signal is proportional to the number conce

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Yadav, Alok Kumar. "Energy Generation from Exhaust Heat: Technologies and Innovations." International Journal for Research in Applied Science and Engineering Technology 12, no. 7 (2024): 854–59. http://dx.doi.org/10.22214/ijraset.2024.63654.

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Abstract: The increasing demand for energy and the need for sustainable solutions have spurred interest in harnessing waste heat from exhaust systems as a potential energy source. This research explores the viability of energy generation using exhaust heat, focusing on converting thermal energy into electrical power. By examining various thermoelectric materials and heat recovery technologies, we aim to develop an efficient system that captures and utilizes waste heat from industrial processes, automotive exhausts, and power plants. The study investigates the thermodynamic principles, material

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Herrmann, Julia, Gunter Hagen, Jaroslaw Kita, Frank Noack, Dirk Bleicker, and Ralf Moos. "Multi-gas sensor to detect simultaneously nitrogen oxides and oxygen." Journal of Sensors and Sensor Systems 9, no. 2 (2020): 327–35. http://dx.doi.org/10.5194/jsss-9-327-2020.

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Abstract. Due to tightened emission limits, the efficiency of exhaust gas aftertreatment systems has to be further enhanced. Therefore, inexpensive and robust NOx sensors are required to be installed not only in automotive exhausts, but also in any other kind of combustion-based application. In this contribution, an impedimetric NOx sensor is presented. The impedance of a functional thick film (KMnO4, manufactured in a screen-printing technique on planar alumina substrates) depends selectively on the NOx concentration in the exhaust but shows a dependency on the oxygen concentration. Therefore

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Ejaz, Muhammad Farhan, Simo Kilpeläinen, Panu Mustakallio, Weixin Zhao, and Risto Kosonen. "An Experimental Study on the Efficacy of Local Exhaust Systems for the Mitigation of Exhaled Contaminants in a Meeting Room." Buildings 14, no. 5 (2024): 1272. http://dx.doi.org/10.3390/buildings14051272.

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In industrial applications, local exhaust systems have been used extensively for capturing and confining contaminants at their source. The present study investigates the efficacy of these systems in mitigating the spread of exhaled pollutants by combining them with mixing and displacement ventilation. Experiments were conducted in a simulated meeting room with six closely situated workstations, featuring five exposed persons (simulated with heated dummies) and one infected person (simulated with a breathing manikin). Six overhead local exhaust units, merged with panels, corresponding to workst

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Bian, Jing, Liqiang Duan, and Yongping Yang. "Simulation and Economic Investigation of CO2 Separation from Gas Turbine Exhaust Gas by Molten Carbonate Fuel Cell with Exhaust Gas Recirculation and Selective Exhaust Gas Recirculation." Energies 16, no. 8 (2023): 3511. http://dx.doi.org/10.3390/en16083511.

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The paper presents a simulation investigation of using a molten carbonate fuel cell (MCFC) combined with exhaust gas recirculation (EGR) or selective exhaust gas recirculation (SEGR) to reduce CO2 emission from the gas turbine in order to cope with climate change problem. EGR or SEGR can be used to concentrate the low-concentration CO2 in gas turbine exhausts. The CO2 concentration is then raised further by adding gas turbine exhaust to the MCFC’s cathode. The suggested gas–steam combined cycle system paired with MCFC and CO2 collection without EGR is contrasted with two novel gas–steam combin

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Alekseenko, V. v., O. B. Sezonenko, and O. O. Vasechko. "RECUPERATION OF HEAT OF INCINERATORS FOR WASTE OF MEDICAL INSTITUTIONS." Energy Technologies & Resource Saving, no. 2 (June 25, 2018): 31–38. http://dx.doi.org/10.33070/etars.2.2018.04.

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Methods of reduction of temperature of exhausted gases for incinerators and features of their practical application were considered. Conditions of effective usage of recuperation of exhaust gases heat during thermal disposal of waste were considered. Methods of recuperation of exhaust gases heat of medical institutions’ waste were adduced and character ized. Evaluation of potential value of heat in exhaust gases of combustion of medical institutions’ waste was produced. Nonstationarity of the development of heat, typical of incinerators of medical institutions, which influence on coordination

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Szewczyńska, Małgorzata, Małgorzata Pośniak, and Elżbieta Dobrzyńska. "Study on Individual PAHs Content in Ultrafine Particles from Solid Fractions of Diesel and Biodiesel Exhaust Fumes." Journal of Chemistry 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/528471.

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In order to characterize PAHs emissions of diesel engine fuelled with diesel and its blend (B20, B40). In the particle phase, PAHs in engine exhausts were collected by fiberglass filters using Electrical Low Pressure Impactor (ELPI) and then determined by a high performance liquid chromatography with a fluorimetric detector (HPLC-FL). The main content in exhaust gases from diesel engine, regardless the type of applied fuel, is constituted by the particles fraction of diameter <0.25 μm. Particles sized <0.25 μm constituted on average approximately 68% of particles in diesel exhaust gases

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Wu, Ziqi, Jiansen He, Die Duan, et al. "Ion Energization and Thermalization in Magnetic Reconnection Exhaust Region in the Solar Wind." Astrophysical Journal 951, no. 2 (2023): 98. http://dx.doi.org/10.3847/1538-4357/accf9b.

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Abstract Plasma energization and thermalization in magnetic reconnection is an important topic in astrophysical studies. We select two magnetic reconnection exhausts encountered by Solar Orbiter and analyze the associated ion heating in the kinetic regime. Both cases feature asymmetric plasma merging in the exhaust and anisotropic heating. For a quantitative investigation of the associated complex velocity-space structures, we adopt a three-dimensional Hermite representation of the proton velocity distribution function to produce the distribution of Hermite moments. We also derive the enstroph

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Radchenko1, Mykola, Andrii Radchenko1, Dariusz Mikielewicz2, Serhiy Forduy1, Anatolii Zubarev 1, and Viktor Khaldobin1. "Enhancing the exhaust heat recovery in integrated energy plant." Joupnal of New Technologies in Environmental Science 7, no. 4 (2020): 3–16. http://dx.doi.org/10.30540/jntes-2020-4.1.

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The efficiency of exhaust heat recovery in typical integrated energy plant on the base of reciprocating gas engines with absorption lithium-bromide chiller for combined electricity, heat and refrigeration supply of the factory "Sаndorа"–"PepsiCо Ukraine" is analyzed. The reserves of decreasing the heat exhausted into atmosphere are revealed on the base of monitoring data and their realization through conversion into refrigeration for cooling the engine cyclic air is proposed. Some scheme decisions of improved and innovative exhaust heat recovery systems providing deep heat conversing into refr

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Frumkin, H., and M. J. Thun. "Diesel Exhaust." CA: A Cancer Journal for Clinicians 51, no. 3 (2001): 193–98. http://dx.doi.org/10.3322/canjclin.51.3.193.

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Malmsten, Sven‐Olof. "Exhaust silencer." Journal of the Acoustical Society of America 94, no. 4 (1993): 2469. http://dx.doi.org/10.1121/1.407417.

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Kiyooka, Katsomi. "Exhaust silencer." Journal of the Acoustical Society of America 99, no. 4 (1996): 1820. http://dx.doi.org/10.1121/1.415347.

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Verbeck, Gerd, and Hans Joachim Schade. "Exhaust System." ATZextra worldwide 12, no. 1 (2007): 160–65. http://dx.doi.org/10.1365/s40111-007-0031-0.

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Verbeck, Gerd, and Christoph Blauensteiner. "Exhaust System." ATZextra worldwide 13, no. 2 (2008): 96–99. http://dx.doi.org/10.1365/s40111-008-0065-y.

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VerbecK, Gerd, and Jens Kosyna. "EXHAUST SYSTEM." ATZextra worldwide 15, no. 11 (2010): 70–73. http://dx.doi.org/10.1365/s40111-010-0241-8.

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