Determination of permeability and inertial resistance coefficient of filter inserts used in the cleaning of natural gas

Čarnogurská, Mária; Příhoda, Miroslav; Brestovič, Tomáš; Molínek, Jiří; Pyszko, René

doi:10.1007/s12206-011-0937-3

Cited by 13 publications

(4 citation statements)

References 6 publications

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“…As a comparison between the present study and normal case, which included a horizontal cylinder in the free air without any restrictions, the correlation obtained for the normal case from Incropera [10] is, NuD = 0.55 (Gr, Pr) 0.25 (11) Comparing Eq. 10 with the Eq.…”

Section: Average Heat Transfer Correlationmentioning

confidence: 87%

Natural Convection Heat Transfer Around a Horizontal Circular Cylinder for the Case of Constant Surface Temperature of the Cylinder Near a Vertical Wall

Novomestský¹,

Banovčan²,

Kapjor³

et al. 2018

MATEC Web Conf.

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Abstract. Natural convection heat transfer from a single horizontal cylinder near an isothermal wall is experimentally investigated in the environmental chamber. The cylinder is heated with constant temperature, the rising plum from the heated cylinder interacts with the side wall and significantly affects the surface heat transfer distribution. Thus, the distance between horizontal cylinder and side wall can influence the heat transfer. The heat transfer from heated cylinder with different distances were compared. Results are obtained for Ra = 10 4 . It was found that natural convection heat transfer from horizontal cylinder depends on the distance between wall. Also, a heat transfer correlation has been proposed for a single horizontal cylinder near a wall and is compared with earlier work. The results indicate that the vertical wall affect the average Nusselt number at the cylinder. Therefore, the vertical wall has a positive effect on the Nusselt number at the cylinder.

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Section: Average Heat Transfer Correlationmentioning

confidence: 87%

Natural Convection Heat Transfer Around a Horizontal Circular Cylinder for the Case of Constant Surface Temperature of the Cylinder Near a Vertical Wall

Novomestský¹,

Banovčan²,

Kapjor³

et al. 2018

MATEC Web Conf.

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“…Several relationships for permeability can be found, the most common is the Blake-Kozeny equation [14,15], which gives the permeability of a bed of packed spheres as…”

Section: Loop Heat Pipementioning

confidence: 99%

Porous Structures in Heat Pipes

Němec¹

2018

Porosity - Process, Technologies and Applications

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This work deals with heat pipes with porous wick structures and experiments depending on the wick structure porosity, because the porosity is one of the wick structure properties which has effect on the heat transport ability of the heat pipe. The work describes manufacturing porous wick structures for wick heat pipe by sintering of copper metal powders with various powder grain size; manufacturing porous wick structures for loop heat pipe by sintering of copper and nickel metal powders with various powder grain size; influence of manufacturing technology on the wick structure porosity by microscopic analysis of the porous structure; design and construction of wick heat pipe and loop heat pipes; experimental determination influence of the wick structure porosity on the heat transport ability of loop heat pipes at various conditions; and experimental and mathematical determination influence of the wick structure porosity on the heat transport ability of wick heat pipes at various conditions.

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“…The air gap behind the porous material improves mainly sound absorption in the lowfrequency range. Physical knowledge of sound absorbing materials, as well as the mathematical and empirical relationships of the sound absorption principle, are known from several books and documents [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Design and Effectiveness Verification of Sound Reduction Measures in Production Hall

Moravec¹,

Liptai²,

Dzuro³

et al. 2017

Adv. Sci. Technol. Res. J.

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The main aim of the work described in this paper was to design and validate measures to reduce noise levels in a training center. This training center serves for the practical training of students with the focus in the shaping and machining engineering products. Reduction of noise in the training center was mainly due to the clarity and hearing of the spoken word between the lecturer and students, as well as to reduce the risk of hearing damage. In order to reduce noise levels, it was proposed to overlap the training center with a roof structure filled with sound absorbing material in two solutions. The noise absorption coefficient of the selected material was determined on the impedance tube. For verification of effectiveness, measurements of equivalent A sound levels were made before and after realization noise reduction measures. Reduction of equivalent A sound pressure levels after the noise reduction measures are between 15.5 dB and 17.5 dB depending on the measuring point and the operating mode. The effectiveness of the implemented measures reaches a good level, as noise was reduced to the recommended legislative level.

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Determination of permeability and inertial resistance coefficient of filter inserts used in the cleaning of natural gas

Cited by 13 publications

References 6 publications

Natural Convection Heat Transfer Around a Horizontal Circular Cylinder for the Case of Constant Surface Temperature of the Cylinder Near a Vertical Wall

Natural Convection Heat Transfer Around a Horizontal Circular Cylinder for the Case of Constant Surface Temperature of the Cylinder Near a Vertical Wall

Porous Structures in Heat Pipes

Design and Effectiveness Verification of Sound Reduction Measures in Production Hall

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