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Simulasi Getaran pada Rak Pengering Kacang Mete

La Ode M. Firman¹, Kamaruddin Abdullah², Leopold 0. Nelwan², Dyah W²

¹Jurusan Teknik Mesin, FTI UniversitasJayabaya

Jl Raya Bogor Km 28,8 Cimanggis, Jakarta Timur

E-mail; buttonisland@yahoo.co.id

²Sekoah Pascasarjana, Program Studi Ilmu Keteknikan Pertanian, FATETA-IPB

Kampus Darmaga, Bogor

Abstract

This research presents both experiment and simulation of vibration components in the room of green house effect dryer. As We know that all surface of cashew nut in the room of green house effect dryer needs hot air. That’s why, the using of vibration in drying of cashew nut is very needed. The objectives of this research are to know vibration amplitude, X (mm), rotation of motor shaft, n (rpm) etc. That are needed by cashew nut in the room of green house effect dryer. The results both simulation and experiment in this research namely: vibration amplitude for 26.3 kg cashew nut is, X 2.88 mm, motor shaft rotation is, n = 438 rpm. And luther the resulting data will be displayed by using table and graph.

Keywords: Experiment, Vibration, Simulation.

Analisis Termal dan Getaran pada Pengering Surya GHE

Tipe Kabinet

La Ode M. Firman¹, Kamaruddin Abdullah², Leopold 0. Nelwan², Dyah W²

¹Jurusan Teknik Mesin, FTI UniversitasJayabaya

Jl Raya Bogor Km 28,8 Cimanggis, Jakarta Timur

E-mail; buttonisland@yahoo.co.id

²Sekoah Pascasarjana, Program Studi Ilmu Keteknikan Pertanian, FATETA-IPB

Kampus Darmaga, Bogor

Abstract

This research presents the analysis of heat transfer process of fluid flow and vibration on GHE dryer. As we know that GHE dryer has a good prospect and will be a potential contribution for drying agricultural commodities in Indonesia. The objectives of this research are to design, analyze both of thermal energy and energy balance, vibration and simulation on GHE dryer. A prototype of dryer was designed by using solar energy, solid fuel and vibration. All data will be analyzed and counted, and futher the resulting data will be displayed by using table and/or graph. The results of this research are: Avarage of air temperature for cashew nut drying in the room of GHE dryer is Trg = 59,6° C. The increasing air temperature in the room of GHE dryer is needed Heat energy from Heat exchanger namely qoApk = 23,3 kJ/s until 23,4 U/s. The using of vibration for cashew nut drying in the room of GHE dryer is needed to decrease damage and decrease moisture content of cashew nut. The final moisture content is 4% until 5%. This condation could be acheived within 10 hours without vibration but only 7 hours by using vibration.

Keywords: Design, Thermal and vibration analysis, experiment and simulation

ANALISA PERBANDINGAN PRODUKTIVITAS MESIN

INJEKSI KAWAGUCHI 140 TON SINGLE CORE DENGAN

DOUBLE CORE

Dwi Rahmalina, Laode M. Firman, Albertus N.

Jurusan Teknik Mesin PESM FTI-UJ

Abstrak

Analisa perbandingan produktivilas mesin injeksi Kawaguchi 140 ton single core dengan double core ini, dilakukan perbandingan produktivitas pada dua buah mesin injeksi merk Kawaguchi dengan kapasitas 140 ton dalam kurun waktu 6 bulan.

Salah satu mesh tersebut merupakan hasil modfikasi dari mesin yang lainnya. Modifllasi yang dilakukan yaitu merubah kapasitas mesin dan sistem kerja mesin. Mesin yang awalnya hanya memiliki kapasitas satu set cetakan yaitu satu cetakan atas (single cavity). Selain itu, mesin yang awalnya prinsip kerjanya secara semi otomatis dimodifikasi menjadi otomatis. Dengan modifikasi ini diharapkan adanya peningkatan produktifitas sebesar ±25% setiap jam. Perhitungan produktivitas mesin setiap bulan dicari dengan cara membandingkan besarnya output mesin berupa kaki (leg), masing-masing mesin dengan besarnya input berupa waktu penggunaan masing-masing mesin setiap bulannya dalam satuan jam. Hasil analisa produktivitas masing-masing mesin tersebut diketahui perbandingan produktivitas dan indeks produkuvitas mesin untuk setiap bulannya dalam periode 6 bulan (Mei-Oktober 2004). Dari  hasil analisa dlperoleh rata-rata kenaikan produktivitas mesin setiap bulannya sebesar 24.4% atau sekitar 23 jam.

Kata kunci: Produktivitas, Kawaguchi, Core