Bambang Setyoko
Program Studi Diploma TeknikMesinUniversitasDiponegoro Semarang Jl.Prof. H. Sudarto, SH - Tembalang, Semarang

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Journal : TEKNIK

MENGANALISA UNJUK KERJA PENGERINGAN IKAN TERI DENGAN SISTEM SIRKULASI UDARA PAKSA Darmanto, Seno; Setyoko, Bambang
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (164.459 KB) | DOI: 10.14710/teknik.v28i2.2137

Abstract

Experiment is done to know the performance of “teri/stolephorus” fish drying with forced air flow system. Theperformance of fish drying is based on moisture of fish, fan/fan velocity, operation temperature and time. Theresearch is done at laboratory by using drying machine with forced air flow system. Based on data analysis itshows that the moisture of fish achieves 20% on fan velocity maximum 2,8 m/s and times operation 3 hours
EVALUASI KINERJA HEAT EXCHANGER DENGAN METODE FOULING F Setyoko, Bambang
TEKNIK Volume 29, Nomor 2, Tahun 2008
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.875 KB) | DOI: 10.14710/teknik.v29i2.1931

Abstract

The performance of heat exchangers usually deteriorates with time as a result of accumulation of depositson heat transfer surfaces. The layer of deposits represents additional resistance to heat transfer and causesthe rate of heat transfer in a heat exchanger to decrease. The net effect of these accumulations on heattransfer is represented by a fouling factor Rf , which is a measure of the thermal resistance introduced byfouling.In this case, the type of fouling is the precipitation of solid deposits in a fluid on the heat transfer surface.The mineral deposits forming on the inner and the outer surfaces of fine tubes in the heat exchanger. Thefouling factor is increases with time as the solid deposits build up on the heat exchanger surface. Foulingincreases with increasing temperature and decreasing velocity.In this research, we obtain the coefisien clean overal 5,93 BTU/h.ft2.oF, Dirt factor 0,004 BTU/h.ft2 0F,Pressure drope in tube 2,84 . 10-3 Psi and pressure drope in shell 4,93 . 10-4 Psi.This result are less thanthe standard of parameter. Its means this Heat exchanger still clean relativity and can operate continousslywithout cleaning.
KAJIAN PELEPAH KELAPA SEBAGAI SERAT KOMPOSIT (STUDY OF COCONUT BRANCH AS COMPOSITE FIBER) Darmanto, Seno; Sediono, Windu; Setyoko, Bambang; Murni, Murni
TEKNIK Volume 28, Nomor 1, Tahun 2007
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (188.107 KB) | DOI: 10.14710/teknik.v28i1.2075

Abstract

Research is done to analyze coconut branch fiber as car body composite. Analyzing is based onmaterial, composition, and strength of material. Research was done in laboratory. Coconut branchfiber is obtained by natural drying process and cutting to become fiber with ±0,5 mm of length.Reinforcement and binder is determined polyester resin. Coir (coconut fiber) have 1.15 kg/m3 ofdensity, 1.15 MPa of strength dan modulus elastisitas 4 – 6 GPa. And based on specimen and studyof literatures can show that increase of cellulose of natural fiber will increase modulus of elasticity.The Increasing of modulus of elasticity will be maximal with cellulose more than 60%. Color ofspecimen is transparent yellow.
PENENTUAN KONDISI OPERASI OPTIMAL PADA PENYULINGAN MINYAK NILAM Setyoko, Bambang
TEKNIK Volume 28, Nomor 1, Tahun 2007
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (232.48 KB) | DOI: 10.14710/teknik.v28i1.2037

Abstract

Patchauly distillation is a process where oil can exctract from patcahauly’s leaf, branch, stem and root.Patchauly’s branch, stem and root had randement lower than patchauly’s leaf.This research used vacuum distillation methode at low temperature and low pressure. The experiment wasdone repeatedly at different pressure and temperature. Than experiment’s data was analysed in laboratoryand compared than standard.The highest purity of patchauly oil is 28 %, efficiency 2,5 % at temperature 80oC and used pressure -50 cmHg