Heat transfer in a membrane assisted fluidised bed with immersed horizontal tubes

S.A.R.K. Deshmukh, S. Volkers, M. van Sint Annaland, J.A.M. Kuipers

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Abstract

The effect of gas permeation through horizontally immersed membrane tubes on the heat transfer characteristics in a membrane assisted fluidised bed was investigated experimentally. Local time-averaged heat transfer coefficients from copper tubes arranged in a staggered formation with the membrane tubes to the fluidised bed were measured in a square bed (0.15 m x 0.15 m x 0.95 m) containing glass particles (75-110 ¿m) fluidised with air distributed via a porous plate, where the ratio of gas fed or removed through the membrane bundles and the porous plate distributor was varied. The experimental results revealed that high gas permeation rates through the membranes strongly decreased the heat transfer coefficient at high superficial gas velocities for tubes at the top of the tube bundle, which was attributed to the reduced mobility and heat capacity (higher dilution) of the emulsion phase. However, the effect of gas permeation was much less pronounced for tubes lower in the tube bundle because of the lower local dilution of the emulsion phase.
Original languageUndefined
Title of host publicationProceedings of Fluidization XI
Place of PublicationNaples
Pages-
Publication statusPublished - 9 May 2004

Keywords

  • METIS-222258
  • IR-49629

Cite this

Deshmukh, S. A. R. K., Volkers, S., van Sint Annaland, M., & Kuipers, J. A. M. (2004). Heat transfer in a membrane assisted fluidised bed with immersed horizontal tubes. In Proceedings of Fluidization XI (pp. -). Naples.
Deshmukh, S.A.R.K. ; Volkers, S. ; van Sint Annaland, M. ; Kuipers, J.A.M. / Heat transfer in a membrane assisted fluidised bed with immersed horizontal tubes. Proceedings of Fluidization XI. Naples, 2004. pp. -
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abstract = "The effect of gas permeation through horizontally immersed membrane tubes on the heat transfer characteristics in a membrane assisted fluidised bed was investigated experimentally. Local time-averaged heat transfer coefficients from copper tubes arranged in a staggered formation with the membrane tubes to the fluidised bed were measured in a square bed (0.15 m x 0.15 m x 0.95 m) containing glass particles (75-110 ¿m) fluidised with air distributed via a porous plate, where the ratio of gas fed or removed through the membrane bundles and the porous plate distributor was varied. The experimental results revealed that high gas permeation rates through the membranes strongly decreased the heat transfer coefficient at high superficial gas velocities for tubes at the top of the tube bundle, which was attributed to the reduced mobility and heat capacity (higher dilution) of the emulsion phase. However, the effect of gas permeation was much less pronounced for tubes lower in the tube bundle because of the lower local dilution of the emulsion phase.",
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Deshmukh, SARK, Volkers, S, van Sint Annaland, M & Kuipers, JAM 2004, Heat transfer in a membrane assisted fluidised bed with immersed horizontal tubes. in Proceedings of Fluidization XI. Naples, pp. -.

Heat transfer in a membrane assisted fluidised bed with immersed horizontal tubes. / Deshmukh, S.A.R.K.; Volkers, S.; van Sint Annaland, M.; Kuipers, J.A.M.

Proceedings of Fluidization XI. Naples, 2004. p. -.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

TY - GEN

T1 - Heat transfer in a membrane assisted fluidised bed with immersed horizontal tubes

AU - Deshmukh, S.A.R.K.

AU - Volkers, S.

AU - van Sint Annaland, M.

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PY - 2004/5/9

Y1 - 2004/5/9

N2 - The effect of gas permeation through horizontally immersed membrane tubes on the heat transfer characteristics in a membrane assisted fluidised bed was investigated experimentally. Local time-averaged heat transfer coefficients from copper tubes arranged in a staggered formation with the membrane tubes to the fluidised bed were measured in a square bed (0.15 m x 0.15 m x 0.95 m) containing glass particles (75-110 ¿m) fluidised with air distributed via a porous plate, where the ratio of gas fed or removed through the membrane bundles and the porous plate distributor was varied. The experimental results revealed that high gas permeation rates through the membranes strongly decreased the heat transfer coefficient at high superficial gas velocities for tubes at the top of the tube bundle, which was attributed to the reduced mobility and heat capacity (higher dilution) of the emulsion phase. However, the effect of gas permeation was much less pronounced for tubes lower in the tube bundle because of the lower local dilution of the emulsion phase.

AB - The effect of gas permeation through horizontally immersed membrane tubes on the heat transfer characteristics in a membrane assisted fluidised bed was investigated experimentally. Local time-averaged heat transfer coefficients from copper tubes arranged in a staggered formation with the membrane tubes to the fluidised bed were measured in a square bed (0.15 m x 0.15 m x 0.95 m) containing glass particles (75-110 ¿m) fluidised with air distributed via a porous plate, where the ratio of gas fed or removed through the membrane bundles and the porous plate distributor was varied. The experimental results revealed that high gas permeation rates through the membranes strongly decreased the heat transfer coefficient at high superficial gas velocities for tubes at the top of the tube bundle, which was attributed to the reduced mobility and heat capacity (higher dilution) of the emulsion phase. However, the effect of gas permeation was much less pronounced for tubes lower in the tube bundle because of the lower local dilution of the emulsion phase.

KW - METIS-222258

KW - IR-49629

M3 - Conference contribution

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BT - Proceedings of Fluidization XI

CY - Naples

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Deshmukh SARK, Volkers S, van Sint Annaland M, Kuipers JAM. Heat transfer in a membrane assisted fluidised bed with immersed horizontal tubes. In Proceedings of Fluidization XI. Naples. 2004. p. -