External heat transfer in polydispersed fluidized beds at elevated temperatures

Borodulya, V. A.; Teplitskii, Yu. S.; Сорокин, А. П.; Matsnev, V. V.; Markevich, I. I.; Kovenskii, V. I.

doi:10.1007/bf01297603

Cited by 10 publications

(4 citation statements)

References 4 publications

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“…Now, heat and mass trans fer take place between the packing and a disperse sys tem instead of a pure gas. The corresponding external exchange coefficient in problems (2)- (5) and (16)- (20) was calculated using the formula [23] (47)…”

Section: Comparison With Experimentsmentioning

confidence: 99%

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Method of calculating the bed combustion of a solid fuel coke residue

Kovenskii

2012

Theor Found Chem Eng

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An approximate method of solving the steady state problem of the bed combustion of a solid fuel coke residue is proposed. The method is based on splitting the initial problem into thermal and chemical problems. The former represents the problem on the hydrodynamics and heat transfer in a blown heat gen erating granular bed. The latter is the problem on the chemical conversion of a mixture of reactants in a spec ified temperature field. These auxiliary problems are combined into an iteration cycle to match their solu tions. The model problem on the combustion of a milled peat coke residue was calculated for the cocurrent and countercurrent process schemes. The bed combustion of coke is calculated for the experimental condi tions published in the literature. The calculated results are compared with the experimental data obtained under these conditions.

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Section: Comparison With Experimentsmentioning

confidence: 99%

“…where the expansion of a fluidized bed in the large volume packing and the corresponding average poros ity were determined by the method [24], while the effective emissivity factor was calculated by the method [23]. In Eq.…”

Section: Comparison With Experimentsmentioning

confidence: 99%

Method of calculating the bed combustion of a solid fuel coke residue

Kovenskii

2012

Theor Found Chem Eng

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“…The heat transfer coefficient inside steam tube rotary dryer can be approximated by the correlation proposed by Borodulya et al [18][19][20] …”

Section: Process Calculationmentioning

confidence: 99%

Advanced Energy Harvesting from Macroalgae—Innovative Integration of Drying, Gasification and Combined Cycle

2014

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State-of-the-art integrated macroalgae utilization processes, consisting of drying, gasification, and combined cycle, are proposed and their performance with respect to energy efficiency are evaluated. To achieve high exergy efficiency, the integration is performed through two main principles: exergy recovery and process integration. Initially, the energy involved in one process is recirculated intensively through exergy elevation and effective heat coupling. Furthermore, the unrecoverable energy from one process will be utilized in the other processes through process integration. As the result, the total exergy destruction from the whole integrated processes can be minimized significantly leading to significant improvement in energy efficiency. The first analysis relates to the performance of integrated drying process, especially the influence of target moisture content to energy consumption. Furthermore, the influences of gasification fluidization velocity to the total generated power and power generation efficiency are also calculated. As the results of study, the proposed integrated-processes proved a very high energy efficiency. A positive energy harvesting with the total power generation efficiency of about 40% could be achieved.

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“…The heat transfer coefficient on a horizontal tube immersed inside the fluidized bed has been reported by Borodulya (1989Borodulya ( , 1991:…”

Section: Self-heat Recuperative Drying Processmentioning

confidence: 99%