PERPINDAHAN PANAS DAN MASSA PADA PROSES PENGERINGAN BIJIAN SECARA MEKANIS MENGGUNAKAN PENGERING MODEL SILO DENGAN METODE DRYERATION
| Main Authors: | , DANANG DWI PRASTYO, , Dr. Ir. Nursigit Bintoro, M.Sc. |
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| Format: | Thesis NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2012
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/101087/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=57284 |
Daftar Isi:
- Grains is considered as prime staple food in Indonesia as it consumed by most of the people of Indonesia. One of critical post-harvest handling process is drying. In this research, mechanical drying process was examined using dryeration method, which consisted of high-temperature heating, tempering, and aeration. The purpose of this study was to analyze heat and mass transfer and drying performance of dryeration with silo-model drier This study used silo equipped with a pneumatic conveyor, centrifugal blower, and burner with Liquid Petroleum Gas (LPG) as fuel. Temperature variations used to dry corn with dryeration method were 70 o C, 85 o C, and 100 o C, while for rough rice was 50 o C. As comparison, corn was also dried using sundrying method, while rough rice was also dried using mechanical conventional method at 70 o C. The results showed that in corn drying, the value of the convection heat transfer coefficient (h) ranged between 0,104 to 0,127 W/m 2o C for drying air temperature ranged between 70 - 100°C, much higher than sun-drying coefficient value of 0,009 W/m 2o C. The h value of rough rice with dryeration method was 0,139 W/m2 o C compared with conventional method of 0,131 W/m 2o C whereas h value of corn tempering ranged between 0,055 to 0,060 W/m 2o C. Constant drying rate (kM) value of corn ranged between 0,161 to 0,265 1/hour, were also higher than sun-drying process of 0,122 1/hour. The kM value of rough rice with dryeration method was 0,423 1/hour compared with conventional methods of 0,221 1/hour, whereas kM value of corn tempering ranged between 0,096 to 0,164 1/hour. Diesel fuel and LPG consumption using conventional mechanical drying were 17 liters and 25,5 kgs, respectively, whereas for dryeration method were only 13 liters and 9 kgs, respectively, for 2 tons rough rice. The results showed that the value of Heat Utilisation Factor (HUF) ranged between 0,80 to 0,93 and Effective Heat Efficiency (EHE) ranged between 0,90 to 0,98.