Experimental study of vegetable oil droplets vaporization under low temperature conditions such as those found in diesel engine cold parts

Zongo Sampawinde Augustin, Daho Tizane, Vaitilingom Gilles, Piriou Bruno, Valette Jérémy, Caillol Christian, Segda Bila Gérard, Higelin Pascal. 2024. Experimental study of vegetable oil droplets vaporization under low temperature conditions such as those found in diesel engine cold parts. International Journal of Engine Research, 12 p.

Résumé : This paper presents an analysis of three vegetable oil droplets vaporization process in the range temperature from 473 to 723 K corresponding to low temperature conditions found in diesel engine cold parts. This process is analyzed for a droplet evaporating in a hot environment at atmospheric pressure using the fiber-suspended droplet technique well used in the literature, and analyzing the droplet normalized square diameter and temperature evolution surrounding the droplet when vaporizing. The main difference between those already studied in literature is the range temperature which varies between 473 and 723 K in which vegetable oils vaporizing problems leading to deposits formation in the cold regions of diesel engines especially in direct injection. This presents a scientific challenge for resolving deposit formation. The findings reveal that vegetable oil droplets experience expansion and heating for temperatures below 623 K: no other changes are observed. Between temperatures of 623 and 683 K, an increase in temperature, expansion, and an inconsistent vaporization is observed. This is followed by a phase of low and constant vaporization. From 683 K, vegetable oils experience an initial stage of heating and expansion, which is accompanied by a phenomenon of puffing and bursting. Finally, in the last phase, residue formation occurs. Puffing and bursting phenomena manifest once the temperature reaches 683 K, indicating the emergence of substantial quantities of light compounds including carboxylic acids, aromatics, acrolein, ketene, and fatty acids. These compounds are formed through the thermal degradation and polymerization of vegetable oils. This process causes deposits to form in the colder areas of diesel engines.

Mots-clés Agrovoc : biocarburant, huile végétale, moteur diésel, composé aromatique, huile de coton, composition chimique, carburant diésel

Mots-clés libres : Vegetable oil spray, Biofuels, Cold atomization, Deposits, Droplet vaporization, Puffing, Bursting, Diesel engines, Low temperatures conditions

Classification Agris : Q60 - Traitement des produits agricoles non alimentaires
P06 - Sources d'énergie renouvelable

Champ stratégique Cirad : CTS 7 (2019-) - Hors champs stratégiques

Agences de financement hors UE : Service de Coopération et d'Action Culturelle

Auteurs et affiliations

• Zongo Sampawinde Augustin, Université Joseph Ki-Zerbo (BFA) - auteur correspondant
• Daho Tizane, Université Joseph Ki-Zerbo (BFA)
• Vaitilingom Gilles, Université Joseph Ki-Zerbo (BFA)
• Piriou Bruno, CIRAD-PERSYST-UPR BioWooEB (FRA) ORCID: 0000-0001-5780-3216
• Valette Jérémy, CIRAD-PERSYST-UPR BioWooEB (FRA) ORCID: 0009-0000-3371-6417
• Caillol Christian, Université d'Orléans (FRA)
• Segda Bila Gérard, Université Joseph Ki-Zerbo (BFA)
• Higelin Pascal, Université d'Orléans (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/610857/)

Métriques

[ Page générée et mise en cache le 2025-03-01 ]