Diesel Particle Size Distribution Estimation from Digital Image Analysis

Lapuerta, Magı́n; Armas, Octavio; Gómez, Arántzazu

doi:10.1080/02786820300970

Cited by 88 publications

(49 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several studies proposed nucleation mode limits between 30 and 50 nm [23]. In this study, nucleation mode particles was decomposed from 5.6 to 30 nm.…”

Section: Transient Soot Measurement Through Three Different Techniquesmentioning

confidence: 99%

Experimental correlations for transient soot measurement in diesel exhaust aerosol with light extinction, electrical mobility and diffusion charger sensor techniques

Bermúdez¹,

Pastor²,

López³

et al. 2014

Meas. Sci. Technol.

View full text Add to dashboard Cite

Abstract.A study of soot measurement deviation using a diffusion charger sensor with three dilution ratios enables was conducted in order to obtain a repeatable setting that can be used to obtain measurements of the particulate matter in terms of soot mass emitted by a light-duty diesel engine under transient operating conditions. The paper includes three experimental phases: an experimental validation of the measurement settings in steady-state operating conditions; evaluation of the proposed setting under the New European Driving Cycle, and a study of the correlations for different measurement techniques providing reliable correlations for estimating soot emission from opacity measurement or from accumulation particle mode concentration. There are several methods and correlations to estimate soot mass rate in the literature but most of them were assessed for steady-state operating points. In this case, the correlations are obtained by more than 4000 points measured in transient conditions. The results of soot measurements allowed by the new two correlations and deviations less that 4% to the reference measurement founded in both correlations are presented in this paper.

show abstract

“…Several studies proposed nucleation mode limits between 30 and 50 nm [23]. In this study, nucleation mode particles was decomposed from 5.6 to 30 nm.…”

Section: Transient Soot Measurement Through Three Different Techniquesmentioning

confidence: 99%

Experimental correlations for transient soot measurement in diesel exhaust aerosol with light extinction, electrical mobility and diffusion charger sensor techniques

Bermúdez¹,

Pastor²,

López³

et al. 2014

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…When mass PM is analysed in Figure 16 (after converting particle number into particle mass emissions through the particle density correlation proposed in Lapuerta et al 36 ), two main differences can be observed with respect to particle number emissions, regardless of the fuel used:…”

Section: Particle Emissionsmentioning

confidence: 99%

Emission benefits from the use of n-butanol blends in a Euro 6 diesel engine

Lapuerta

Hernández

Rodríguez–Fernández

et al. 2017

International Journal of Engine Research

Self Cite

View full text Add to dashboard Cite

Tests with diesel/n-butanol blends (up to 20% by volume) were carried out in a Euro 6 engine following the New European Driving Cycle in a test bench. No decrease in engine efficiency was observed when n-butanol is used and fuel consumption increased proportionally to its lower heating value. Regarding emissions, total hydrocarbon and carbon monoxide increased when n-butanol is used. On the other hand, the use of n-butanol reduces the particle emissions down to a minimum value (for around 16% of n-butanol content) and then increases particle emissions again. This was observed in both mass and particle number. This trend occurs as a consequence of the compromise between the increase in oxygen content, which inhibits soot formation, and the increase in hydrocarbon emissions, especially under cold-engine conditions, which promotes liquid nucleation. Finally, NO X emissions remained unchanged as a consequence of the compensation between larger ignition delays and shorter combustion durations.

show abstract

“…Values for a log-normal distribution with r o = 0.234 µm and σ = 1.5 were taken from Lapuerta et al (2003), and N o was assumed to be the same as that for sulfate aerosol, i.e., 8.3 × 10 6 particles/m 3 . …”

Section: Soot Aerosolsmentioning

confidence: 99%

Modeling LIDAR Detection of Biological Aerosols to Determine Optimum Implementation Strategy

Sheen¹,

Aker²

2007

View full text Add to dashboard Cite

SummaryThis report summarizes work performed for a larger multi-laboratory project named the Background Interferent Measurement and Standards project. While PNNL was originally tasked to develop algorithms to optimize biological warfare agent detection using UV fluorescence LIDAR, the current uncertainties in the reported fluorescence profiles and cross sections preclude the development of any meaningful models. It was decided that a better approach would be to model the wavelength-dependent elastic backscattering from a number of ambient background aerosol types, and compare this with that generated from representative sporulated and vegetative bacterial systems. Calculations in this report show that a 266, 355, 532, and 1064 nm elastic-backscatter LIDAR experiment will allow an operator to immediately recognize when sulfate, VOC-based, or road dust (silicate) aerosols are approaching, independent of humidity changes. It will be more difficult to distinguish soot aerosols from biological aerosols, or vegetative bacteria from sporulated bacteria. In these latter cases, the elastic scattering data will most likely have to be combined with UV fluorescence data to enable a more robust categorization.iii iv Acknowledgments

show abstract

Diesel Particle Size Distribution Estimation from Digital Image Analysis

Cited by 88 publications

References 20 publications

Experimental correlations for transient soot measurement in diesel exhaust aerosol with light extinction, electrical mobility and diffusion charger sensor techniques

Experimental correlations for transient soot measurement in diesel exhaust aerosol with light extinction, electrical mobility and diffusion charger sensor techniques

Emission benefits from the use of n-butanol blends in a Euro 6 diesel engine

Modeling LIDAR Detection of Biological Aerosols to Determine Optimum Implementation Strategy

Contact Info

Product

Resources

About