Mathematical Model of Fixed-Bed Drying and Strategies for Crumb Rubber Producing STR20

Tirawanichakul, Yutthana; Tirawanichakul, Supawan

doi:10.1080/07373930802333569

Cited by 14 publications

(16 citation statements)

References 8 publications

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“…Comparative study was carried on by various drying conditions and was only operated by the two stage drying method. This is because of the results of the previous work (14) confirmation.…”

Section: Introductionsupporting

confidence: 48%

“…According to the previous work, the equilibrium moisture content in (2) can be determined and then the experimental data was comparatively studied to the empirical drying models in (2) as illutrated in Table 2 (13)(14).…”

Section: Resultsmentioning

confidence: 99%

“…Besides these four equations, there is an equation for calculating temperature risen by shaft work, specific energy consumption calculation which were followed by (14) III…”

Section: Energy Balance Equation At Recycle Ductmentioning

confidence: 99%

“…Several mathematical drying models for cereal grain kernel, fresh fruit and some food matter have been proposed to describe evolution of heat and mass transfer such as fixed-bed drying (2)(3), fluidized-bed drying(4), spouted-bed drying (5)(6), impingement drying, pulse drying (7) and continuous drying (8)(9)(10)(11). Even drying is principal process for natural rubber industries especially in Asean countries where are the largest various grades block rubber exports in the world, there are a few research works (12)(13)(14)(15). The change of drying process in factories was hard work because it affects the production line.…”

Section: Introductionmentioning

confidence: 99%

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Two-stage optimal fixed-bed drying for natural rubber producing STR20 block rubber

Tirawanichakul

Tasara

Tirawanichakul

2011

2011 IEEE Colloquium on Humanities, Science and Engineering

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The objectives of this research were to study effect of drying parameters on two stage drying of natural rubber producing STR20 block rubber and to verify drying model program prediction of moisture transfer and specific energy consumption. The experiment was set-up at the 1 st stage drying with upward inlet air temperature between 110 and 150°°°°C (30-60 min) and the 2 nd stage drying with downward inlet air temperature between 110 and 140°°°°C (100-120 min). Specific air flow rate was varied between 0.07 and 0.25 kg dry air/s-kg dry rubber while natural rubber bed-depth was varied between 0.1 and 0.3 m. The average initial moisture content of the fresh natural crumb rubber was in ranges of 38.1-52.5% dry-basis. As the results of 19 experiments, the drying kinetics exhibited only one falling rate period while drying temperature and bed depth of natural rubber relatively affected drying kinetics of crumb rubber sample. The simulation drying system program including energy consumption analysis was developed using the basic principle of near thermal equilibrium drying model. Simulation was carried out to validate the drying model against experimental results. The results conclude that the predicted results were in good agreement with experimental results. In addition, the qualities of the dried crumb rubber producing block rubber satisfied all standard STR20 criteria. The optimal drying strategy of STR20 block rubber process is the 30 cm. bed depth natural rubber drying operated under the conditions of rapid 1 st drying with 130°°°°C and following the 2 nd stage drying with 110°°°°C for all drying period of 220 min.

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“…Comparative study was carried on by various drying conditions and was only operated by the two stage drying method. This is because of the results of the previous work (14) confirmation.…”

Section: Introductionsupporting

confidence: 48%

Section: Resultsmentioning

confidence: 99%

“…Besides these four equations, there is an equation for calculating temperature risen by shaft work, specific energy consumption calculation which were followed by (14) III…”

Section: Energy Balance Equation At Recycle Ductmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Two-stage optimal fixed-bed drying for natural rubber producing STR20 block rubber

Tirawanichakul

Tasara

Tirawanichakul

2011

2011 IEEE Colloquium on Humanities, Science and Engineering

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“…Dalam kajian kinetika pengeringan karet sit, dilaporkan bahwa proses pengeringan dengan metode udara panas masih jauh lebih baik dibandingkan dengan metode pengeringan rumah kaca/alami (Dejchanchaiwong, Suchonpanit, Tirawanichakul, Tekasakul, & Tirawanichakul, 2011). Selain itu, dilaporkan juga bahwa saat pengeringan, faktor yang sangat berpengaruh terhadap konsumsi energi dan kualitas karet adalah kelembaban awal karet dan laju panas (Tirawanichakul & Tirawanichakul, 2008). Pada dasarnya proses pengeringan banyak menghabiskan energi, sehingga diperlukan teknik dan model yang tepat untuk menjadikan proses pengeringan optimal yang berimplikasi pada akurasi dan efisiensi biaya .…”

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Penggunaan Waktu Dan Suhu Yang Ideal Pada Proses Pengeringan Kadar Karet Kering Lateks

Wijaya

Rachmawan

2019

JAF

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Measurement of dryrubbercontent of latex (DRC) is very important factor in the trade transactions of rubber. Determination of temperature and drying time of latex’s DRC need to be studied in order to avo id the excessive difference between farmers and factories so that it can cause loss effect on sale andpurchase of latex transaction. This study aimed to determine the temperature and time factor of the DRC during the drying process and its interaction. The study used a complete random ized design (RAL) with twofactors, i.e. temperature (80oC, 90oC, 100oC, 110oC, 120oC) and time (2, 4, 6 hours) with 3 replications and as control was 100oC for 2 hours. The results showed that the interaction between temperature and time was apparent (p <0,010). The using of temperature variations of 90oC (4 and 6 hours), 110oC (2, 4, and 6 hours) and 120oC (2, 4, and 6 hours) is possible to replace standard temperature and time (100oC for 2 hours ), because it have no significant differences in the value of latex’s DRC.To prevent the latex sample browning and stickiness due to oxidation of high temperature, it can use temperature of 90oC-100oC and drying timeof 4-6 hours.

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Technical Review on Crumb Rubber Drying Process and the Potential of Advanced Drying Technique

Tham

Hii

Ong

et al. 2014

Agriculture and Agricultural Science Procedia

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Mathematical Model of Fixed-Bed Drying and Strategies for Crumb Rubber Producing STR20

Cited by 14 publications

References 8 publications

Two-stage optimal fixed-bed drying for natural rubber producing STR20 block rubber

Two-stage optimal fixed-bed drying for natural rubber producing STR20 block rubber

Penggunaan Waktu Dan Suhu Yang Ideal Pada Proses Pengeringan Kadar Karet Kering Lateks

Technical Review on Crumb Rubber Drying Process and the Potential of Advanced Drying Technique

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