Experimental determination of thermophysical, thermokinetic, and filtration characteristics of peat

Гришин, А. М.; Golovanov, A. N.; Sukov, Ya. V.

doi:10.1007/s10891-006-0135-9

Cited by 12 publications

(6 citation statements)

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“…Upon closing the fire pit, the internal fire temperature recorded by the thermocouple was between 110 • C and 260 • C. The surface temperature above the fire was around 35 • C upon closing and increased steadily to ∼70 • C over a period of an hour. This is in line with expected theoretical and experimental values from the literature for heat transfer through peat [9,13,31]. Given that the ambient ground temperature is expected to be 26-33 • , the increase in surface temperature above an underground fire makes it easy to distinguish from the surrounding ground (see Figure 2).…”

Section: Resultssupporting

confidence: 89%

“…Dry peat, even when underground, allows more efficient air flow through than moist peat [5][6][7][8]. If a buried layer of dry peat is ignited it can smoulder slowly underground for long periods of time (from days to years) [8][9][10][11]. Smouldering is a relatively low temperature (500-700 • C compared to 1500-1800 • C for flaming combustion), flameless form of combustion which requires less heat for ignition, less oxygen for sustained burning (10% oxygen concentration for smouldering vs. 16% for flaming), and significantly more water to extinguish (>50% more water per mass of fuel compared to flaming) [8,12].…”

Section: Introductionmentioning

confidence: 99%

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Thermal-Drones as a Safe and Reliable Method for Detecting Subterranean Peat Fires

Burke

Wich

Kusin

et al. 2019

Drones

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Underground peat fires are a major hazard to health and livelihoods in Indonesia, and are a major contributor to carbon emissions globally. Being subterranean, these fires can be difficult to detect and track, especially during periods of thick haze and in areas with limited accessibility. Thermal infrared detectors mounted on drones present a potential solution to detecting and managing underground fires, as they allow large areas to be surveyed quickly from above and can detect the heat transferred to the surface above a fire. We present a pilot study in which we show that underground peat fires can indeed be detected in this way. We also show that a simple temperature thresholding algorithm can be used to automatically detect them. We investigate how different thermal cameras and drone flying strategies may be used to reliably detect underground fires and survey fire-prone areas. We conclude that thermal equipped drones are potentially a very powerful tool for surveying for fires and firefighting. However, more investigation is still needed into their use in real-life fire detection and firefighting scenarios.

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Thermal-Drones as a Safe and Reliable Method for Detecting Subterranean Peat Fires

Burke

Wich

Kusin

et al. 2019

Drones

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“…Some studies relating to the drying of peat include experimental study of its thermophysical and thermokinetic characteristics. (Grishin et al, 2006) found values of activation energy of 47.376 kJ/mole, and, in an investigation of the thermal analysis and decomposition kinetics of Chinese forest peat, Chen et al (2011) found a value of activation energy of 68.510 kJ/mole. Each type of material has a specific drying curve, which is dependent on the physical and chemical characteristics of the substance.…”

Section: Introductionmentioning

confidence: 99%

Drying Kinetics of Indonesian Peat

Palamba¹,

Ramadhan²,

Pamitran³

et al. 2018

IJTech

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Indonesia has the largest peatland area in the tropical region, situated mainly in Sumatra, Kalimantan and Papua. Peat is an organic substance which is highly combustible in dry conditions; dried peat can burn easily and spread vertically and laterally along peat layers. In Indonesia, peat fires have often occurred in recent decades. Besides being influenced by the amount of organic content, smoldering peat fires are also effected by the drying rate, pyrolysis, and heterogeneous oxidation on the peat surfaces. In contrast to flaming combustion, which have been widely studied, smoldering peat fires remain little understood. To date, the major peat fire-related publications concern the pyrolysis and combustion stages. The contribution of the drying kinetics of peat in the peat fire phenomenon is important, as this could provide complete understanding of the peat fire process. The objective of this paper is to make an isothermal drying kinetics analysis of peat. Peat samples were taken from various locations in Indonesia with the largest peat distribution, namely South Sumatra, Central Kalimantan and Papua. An isothermal test was conducted using a Shimadzu MOC63u Moisture Balance. At certain interval times, the weight of the specimen was measured, until it reached a constant weight of less than a 0.05% change in moisture content. Isothermal analysis was conducted for each peat sample at temperatures of 60, 70, 80, 90, 100, and 110 o C. The results show that the activation energies from the isothermal measurement test were 24.97, 25.08, and 30.11 kJ/mole for Papuan, South Sumatran and Central Kalimantan peat, respectively.

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“…It should be noted that all the well-known works do not consider a botanical composition of peat to be a factor for penetration of the combustion front in the mass of peat. The influence of the botanical composition on ignition of peat is given in the work (Grishin et al 2006) that provides the results of experiments for determination of the minimum ignition energy, and in the work (Loboda 2012) that provides the results of experimental studies to determine the depth of the combustion front in the peat layer. The samples represented four types of peat with different characteristics (botanical composition, density, humidity content and degree of decomposition).…”

Section: Domingos Xavier Viegas Editor Introductionmentioning

confidence: 99%

Experimental research of penetration hearth of burning in the peat layer

Grishin¹,

Zima²,

Касымов³

2014

Advances in Forest Fire Research

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Experimental determination of thermophysical, thermokinetic, and filtration characteristics of peat

Cited by 12 publications

References 0 publications

Thermal-Drones as a Safe and Reliable Method for Detecting Subterranean Peat Fires

Thermal-Drones as a Safe and Reliable Method for Detecting Subterranean Peat Fires

Drying Kinetics of Indonesian Peat

Experimental research of penetration hearth of burning in the peat layer

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