Heat transfer in fluidized beds

Borodulya, V. A.; Ganzha, V.L.; Teplitskii, Yu. S.; Epanov, Yu. G.

doi:10.1007/bf00871918

Cited by 9 publications

(5 citation statements)

References 3 publications

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“…Moreover extensive studies of heat transfer in fluidized beds have been reported with many supporting theories proposed on the prevailing heat transfer mechanism [1][2][3][4][5][6][7]. Most of the previous heat transfer research on fluidized beds involved the use of temperature probes placed inside or on the walls of fluidized beds [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A study of heat transfer in fluidized beds using an integrated DIA/PIV/IR technique

Patil

Peters

Sutkar

et al. 2015

Chemical Engineering Journal

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Section: Introductionmentioning

confidence: 99%

A study of heat transfer in fluidized beds using an integrated DIA/PIV/IR technique

Patil

Peters

Sutkar

et al. 2015

Chemical Engineering Journal

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“…The analysis conducted in [2] showed that the methods and equipment currently used in laboratory practice for comprehensive determination of the HMT characteristics of disperse materials do not fully meet the above requirements and are in need of improvement. They are not sufficiently accurate and lack the proper theoretical and metrological underpinnings.…”

Section: V~y (12)mentioning

confidence: 96%

“…To analyze the complex heat transfer process we used the two-zone heat transfer model suggested earlier [2]. Postulating a gas layer transparent to radiation and assuming that the heat transfer in the developed fluidized bed is limited only by the resistance of the gas film at the heat transfer surface [2], we can write the system of equations describing the process in the following form (heat transfer with a vertical cylinder):…”

mentioning

confidence: 99%

External heat transfer in polydispersed fluidized beds at elevated temperatures

Borodulya

Teplitskii

Сорокин

et al. 1989

Journal of Engineering Physics

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pipe wall temperature at points of attachment of bundles from body i in K; Twn pipe wall temperature at point of attachment for bundle n in K; (oi) n and o i thermal conductivities of bundle n and all bundles from body i in W/K; oij thermal conductivity between bodies i and j in W/K; Oci, oZ, Ocw thermal conductivities from case to body i and total and radiative conductivities from case to pipe in W/K; ~c convective heat-transfer coefficient between pipe and coolant in W/m2"K; ~r radiative heat-transfer coefficient between case and pipe in W/m2-K; pipe material thermal conductivity in W/m.K; c specific heat of helium at constant pressure in J/kg'K; q and qr correspondingly densities of the total heat flux and radiative flux to the pipe in W/m2; Pr heat flux along bundle r in W; M coolant mass flow rate in kg/sec; F tube cross section area in m2; S i and S o inside and outside surface areas of pipe in m2; L pipe length in m; x = x/L relative coordinate along pipe axis; x r relative coordinate for bundle r attachment; R total number of bundles; N i number of bundles cooling body i; Ji number of bodies linked by heat bridges to body i; ~i relative error in calculating the temperature of body i by comparison with numerical result in %; ~w mean relative error in heat exchanger temperature calculated numerically by comparison with temperature from (4) taken at ten equally separated points in %; ~(X--~r) Dirac function. LITERATURE CITED i. M. Akamatsu, M. Taneda, Y. Ohtsu, et al., Adv. Cryog. Eng., 31, 559-566 (1986). 2. V. A. Romanenko, S. V. Tikhonov, S.

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“…This includes considering studies of the fluidized bed hydrodynamics and heat transfer (see, e.g., the work of Kunii and Levenspiel [1]; Basu and Nag [2]; Zhou et al [3,4]). Most of the previous work was based on temperature probes placed inside, mounted or placed on the fluidized bed walls (see, e.g., Borodulya et al [5]; Valenzuela and Glicksman [6]). Limtrakul et al [7], Zhou et al [8] and Patil et al [9] previously used a computational fluid dynamics-discrete element method (CFD-DEM) to study the hydrodynamics combined with heat transfer in fluidized beds.…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic and Heat Transfer Study of a Fluidized Bed by Discrete Particle Simulations

Buist

Kuipers

et al. 2020

Processes

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A numerical simulation study was carried out to study the combined thermal behavior and hydrodynamics of a pseudo-2D fluidized bed using a computational fluid dynamics–discrete element method (CFD-DEM). To mimic the effect of heterogeneous exothermic reactions, a constant heat source was implemented in the particle energy equation. The effects of superficial gas velocity, bed height and heat source distribution were analyzed with the aid of averaged volume fraction and temperature distributions and velocity profiles. It was found that both the gas superficial velocity and the bed aspect ratio have a profound influence on fluidization behavior and temperature distributions.

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Heat transfer in fluidized beds

Cited by 9 publications

References 3 publications

A study of heat transfer in fluidized beds using an integrated DIA/PIV/IR technique

A study of heat transfer in fluidized beds using an integrated DIA/PIV/IR technique

External heat transfer in polydispersed fluidized beds at elevated temperatures

Hydrodynamic and Heat Transfer Study of a Fluidized Bed by Discrete Particle Simulations

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