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Theoretical study of fluidization and heat transfer on fluidized bed coffee roaster

Satya Andika Putra, Umi Hanifah

2019enfluidizationcoffeeheat transferroastingfluidized bed

Abstract

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The roasting coffee is one of the processing coffee beans which determines the quality of the coffee flavor. In general, the process of roasting coffee uses a rotating cylinder, a fixed drum with agitator and a fluidized bed. Theoretical study of fluidization and heat transfer has been carried out on a fluidized bed coffee roaster 1000 gram capacity with a tubular roasting chamber. Green beans (Robusta coffee) used in the roaster at two different operating temperature settings, 250°C and 220°C for high-temperature short time (HTST) and low-temperature long time (LTLT) roasting processes. At this operating temperature, minimum fluidizing velocity was 2.19 m/s and 2.16 m/s respectively, and the thermal energy for roasting coffee was 8773.25 W and 7639.56 W respectively. The thermal energy was defined based on the heat transfer from hot air to coffee beans which was 3399.63 W for HTST process and 3091.49 W for LTLT process that calculates at hot air velocities 2.5 m/s.

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Cite This Work

@article{04b2762c-bf97-4fb6-a872-543e9a64da0c,
  title={Theoretical study of fluidization and heat transfer on fluidized bed coffee roaster},
  author={Satya Andika Putra and Umi Hanifah},
  year={2019},
  language={en}
}
TY  - JOUR
TI  - Theoretical study of fluidization and heat transfer on fluidized bed coffee roaster
AU  - Satya Andika Putra
AU  - Umi Hanifah
PY  - 2019
LA  - en
ER  -

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