Longitudinal Fin Effect on Effectiveness of Double Pipe Heat Exchanger

Тимербаев, Н. Ф.; Almohammed, Omar Abdulhadi Mustafa; Ali, Asaad Kamil

doi:10.1007/978-3-319-95630-5_63

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…Two copper tubes with different diameters are provided to carry out working material (water) from the heat source (electrical heater) to the lower reservoir positioned below the specimen. It is clear that different diameter of copper tubes means the difference in side surface area of each tube [8,20], so that; the water inside the bigger diameter tube is relatively colder than that is inside the smaller tube, this connection lines forces the water to move up through the narrow tube and fall through the other one due to the difference in densities of water inside each tube. This mechanism leads to carry heat to the upper portion or, to the second main component which called the core of the apparatus.…”

Section: Apparatusmentioning

confidence: 99%

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Experimental Investigation on the Effect of Sawdust Particles Size on Its Thermal Conductivity

Yassien¹,

Mustafa²,

Soheel³

et al. 2023

IJHT

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The measurement of the thermal conductivity of the sawdust is one of the most difficult techniques due to its uniformed shape, by using this instrument, it gives the ability of measuring the thermal conductivity of the sawdust, without changing its physical properties, during the experiment, as well as, there are no necessity to use the additional materials in form of adhesive materials, that gives an identified shape of the specimen. In this study, wood sawdust is classified into three groups depending on the size of the wood pellets, namely; wo1≥1.18mm, 1.18>wo2>0.6mm and wo3≤0.6mm. To keep out the thermal properties of the sawdust as it is, no mechanical or chemical processes were carried out on sawdust specimens, such as compressing or bonding. The effect of moisture content on the thermal properties of sawdust is eliminated by drying the specimens, the procedure is carried out by heating it up to 100℃ for a 30 min. During this study, it can be seen that the thermal conductivity of all samples is inversely proportional to the working temperature. At a relatively low temperature less than 45℃, it can be said that the first model (wo1) has the lowest thermal conductivity while the differences in the thermal conductivity of the samples are insignificant when the temperature exceed 50℃, therefore; the first model (wo1) represents a good choice for flat plate solar collector insulation because it has the same activity as well as it is light and cheap.

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Section: Apparatusmentioning

confidence: 99%

“…Sawdust is a material that has low thermal conductivity [7,8]. Many researchers have studied the physical properties of sawdust.…”

Section: Introductionmentioning

confidence: 99%