Physical model for vaporization

Garai, József

doi:10.1016/j.fluid.2009.06.005

Cited by 46 publications

(31 citation statements)

References 30 publications

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“…Therefore, drying pretreatment of biomass material is usually desirable and sometimes essential to minimize the effects of moisture on biomass pyrolysis utilization [32]. In synthesis gas production the feedstocks must be dried to below the 30 % MC, preferably to about 15 %, and in pyrolysis to below 10 % [33]. Production of secondary standardized solid biofuels with lower MC and higher calorific value, such as wood pellets, also requires drying of raw wood chips/sawdust prior to pellet manufacturing.…”

Section: Resultsmentioning

confidence: 99%

“…It is an amount of heat required to convert 1 kg of water into vapour being a function of pressure. In a physical model given by Garai [33], it is considered the energy equal to surface resistance of liquid-the energy molecule requires to change from liquid to gas phase. The relation established will be subject of detailed analysis in the future investigation with higher number of samples.…”

Section: Resultsmentioning

confidence: 99%

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Wood biomass characterization by DSC or FT-IR spectroscopy

Bryś

Ostrowska–Ligęza

et al. 2016

J Therm Anal Calorim

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The wood biomass obtained from four tree species: spruce, beech, willow and alder was studied. Sawdust obtained by sawing of wood was dried in a convective dryer at 80°C, without drying-agent flow. The measurements taken with oven-drying method covered determination of initial moisture and its detailed changes during entire drying process. Both DSC curves and spectral data from infrared spectra registered in the classic MIR range were also used to monitor change in water content in studied samples within entire drying process. Results obtained suggest that the DSC curves can be efficiently used as a discriminant to distinguish dry and wet biomass samples, as significant differences within courses of specific DSC curves of woody biomass before and after drying process occurred. Calorimetrically measured values of enthalpy of evaporation of water and water content in studied biomass samples were directly proportional to high determination coefficient, i.e. 0.9653. Statistical analysis proved quantitative directly proportional correlation between content of water measured with oven-drying method and IR spectral data of studied samples.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Wood biomass characterization by DSC or FT-IR spectroscopy

Bryś

Ostrowska–Ligęza

et al. 2016

J Therm Anal Calorim

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“…Therefore, a definite correlation between the energy equivalent and level of evaporative heat loss for any ambient temperature was observed. Because there is also a specific level of heat production for any temperature, it was possible to calculate the heat dissipated through evaporation at any ambient temperature and the amount of water spent to dissipate that amount of heat, as the evaporative heat of 1 g of water is equal to 2.42 kJ [39].…”

Section: Metabolic Rate Measurementsmentioning

confidence: 99%

The stoichiometric approach in determining total evaporative water loss and the relationship between evaporative and non-evaporative heat loss in two resting bird species: passerine and non-passerine

Гаврилов

2015

Avian Res

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The stoichiometric approach in determining total evaporative water loss and the relationship between evaporative and non-evaporative heat loss in two resting bird species: passerine and non-passerine GavrilovGavrilov Avian Res (2015) 6:19 DOI 10.1186 RESEARCHThe stoichiometric approach in determining total evaporative water loss and the relationship between evaporative and non-evaporative heat loss in two resting bird species: passerine and non-passerine Valery M. Gavrilov * Abstract Background: Evaporation is of significant ecological interest. Evaporation from an animal always results in a decrease in the temperature of the surface from which the evaporation occurs. Therefore, evaporation is a one-way transfer which causes heat loss from the organism. Biological evaporation always involves the loss of water which is a vital resource for nearly all biochemical processes. Evaporation is loss of heat via loss of body mass. Methods:The simultaneous determination of energy expenditure and loss of body mass in resting birds allows us to estimate evaporative heat loss. This method includes direct measurements of the energetic equivalent of the loss of body mass as the ratio between heat production, determined by the rate of oxygen consumption and the loss of body mass at various ambient temperatures. Results:The data indicate that evaporation was minimal at lower critical temperature and that the rate of evaporation increased at lower or higher temperatures. Obtained results indicate that passerine and non-passerine species have the ability to change their non-evaporative heat conductance the same number of times (approximately fourfold), and that their abilities in this respect are similar. Conclusions:The novelty of the study resides in the stoichiometric approach to determination of total evaporative water loss. The analysis shows that determinations by stoichiometric approach of total evaporative water loss yielded the values, which fit into the confidence intervals of all equations from literatures. The basal metabolic rate and nonevaporative thermal conductance are fundamental parameters of energetics and determine the level of physiological organization of an endothermic animal.

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“…The non-unity value of C 1 may be due to minor differences in the enthalpy of the vaporization L m . The enthalpy partly consists of the energy required for the atom-by-atom escape through the liquid surface, and partly of the work done by the expanding vapor [101] which is considered as the driving mechanism. At room conditions, the work done by the expanding vapor is only 8% of the total vaporization enthalpy for both copper and gold, i.e.…”

Section: Jet-and Spray Ejection By Partial Film Vaporizationmentioning

confidence: 99%

“…of similar order as the fitting factors used. Therefore, using only the work done by the expanding vapor, as for example provided by Garai et al [101], may allow for a reasonable velocity estimate.…”

Section: Jet-and Spray Ejection By Partial Film Vaporizationmentioning

confidence: 99%

Laser-induced forward transfer of pure metals

Pohl¹

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Physical model for vaporization

Abstract: false2016-03-16T16:38:26

Cited by 46 publications

References 30 publications

Wood biomass characterization by DSC or FT-IR spectroscopy

Wood biomass characterization by DSC or FT-IR spectroscopy

The stoichiometric approach in determining total evaporative water loss and the relationship between evaporative and non-evaporative heat loss in two resting bird species: passerine and non-passerine

Laser-induced forward transfer of pure metals

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