Srilomsak, Mek

Loading...
Thumbnail Image
Preferred name
Srilomsak, Mek
Alternative Name
Srilomsak, M.
Main Affiliation
Email
mek.sr@kmitl.ac.th

Settings

Now showing 1 - 3 of 3
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Total energy requirement for hydrogen production reactor using various porous media materials
    (2015-01-01)
    Srilomsak, Mek
    ;
    Aungkharuengrattana, Waroht
    ;
    Sesuk, Thanathon
    ;
    Charoensuk, Jarruwat
    ;
    Charochrojkul, Sumittra
    In a hydrogen production reactor, combustion of LPG was used as a heat source for ethanol steam reforming. For such purpose, the operating temperature was required to be around 700-900 °C along the entire height of the reactor. Various types of porous media materials were used as a heat transfer media, i.e. 25mm ceramic saddles, random size bio-filter media from MTEC, ceramic foam, and ceramic balls. The objective of this study was to obtain the practical amount of total energy input, to compare with theoretical calculation which can achieve the required temperature of ethanol steam reforming for the hydrogen production. From our experiments, 13.20 kW of energy was needed to fulfill the requirement of the reactor, while only 2.49 kW was expected from theoretical calculation. Most energy loss was due mainly to: 1) heat loss at the top of the reactor where the metal part was directly exposed to the environment, 2) a large amount of energy loss at the furnace stack and, 3) insufficient mixing at the early stage of combustion at the bottom of the furnace as noticed by high CO concentration in flue gas. The porous media material has a significant effect on temperature distribution and energy consumption. The results show that the use of ceramic saddles as porous media consume more energy than the ceramic foam and the bio-filter media mixed with ceramic saddles during the start-up period of the reactor.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Reduction of Diesel Engine's Particulate Matters using Retrofit CeO2Diesel Oxidative Catalyst and Partial Flow Diesel Particulate Filter System
    (2022-01-01)
    Liu, Hai
    ;
    Charoenphonphanich, Chinda
    ;
    Karin, Preechar
    ;
    Srilomsak, Mek
    ;
    Srimanosaowapak, Sompong
    In this research, CeO2 was chosen for the DOC catalyst. Moreover, a partial-flow DPF was installed after DOC. The exhaust gas experiment was conducted at 20% - 50% engine load varying 1000,1500, and 2000 rpm of engine speed. The research results show that NOx reduced around 25% with CeO2 DOC and DPF systems at higher engine load. On the other hand, particulate matters decrease around 65% after CeO2 DOC and DPF systems. Furthermore, CO and HC amount were substantially reduced after applying after-treatment systems. According to fuel consumption, BSFC, and BTE results, the after-treatment system has no significant impact on engine performance.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Characterization of biodiesels and tire derived particulate matters in morphology and nanostructure
    (2022-01-01)
    Oh, Ban seok
    ;
    Karin, Preechar
    ;
    Srilomsak, Mek
    ;
    Chonvasin, Kritin
    ;
    Po-ngen, Watcharin
    Particulate Matters (PM) are known to be dangerous to human health and the environment. Regulations have been set to limit PM levels from vehicles, including compression ignition engine vehicles. The effect of increasing biodiesel content in the fuels has been investigated with respect to the PM using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). PM from tire emissions were compared against diesel PM using SEM, energy dispersive x-ray spectroscopy (EDS), TEM, particle size analysis, x-ray diffraction (XRD), and Raman spectroscopy (RS). The SEM and TEM show that increasing the biodiesel content decreased the size of the PM agglomerate particles, primary particles, and fringes. The EDS, RS, and XRD show that Tire PM are mostly carbon with silicon, calcium, zinc, and other various trace elements. They also allow comparisons with diesel PM for the carbon nanostructure. The particle size analysis shows that Tire PM are generally larger than engine derived PM. The TEM showed that the nanostructure of the carbonaceous Tire PM was the same fringe structure as the engine derived PM. The Tire PM was successfully characterized using similar methods as engine derived soot. There is strong relationship between the increasing of biodiesel content and reduction of agglomerate size, primary particle size and average fringe length.
      1