Seno Darmanto
Program Diploma III Teknik Mesin Fakultas Teknik Universitas Diponegoro

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PELUANG PENGHEMATAN ENERGI UAP MENGGUNAKAN METODE NON - INVESTMENT POINT Rahmat, -; Setyoko, Bambang; Darmanto, Seno
T R A K SI Vol 5, No 1 (2007): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (116.621 KB) | DOI: 10.26714/traksi.5.1.2007.%p

Abstract

Energy efficiency  of boiler system is the main parameter in depressing of  operational cost. There are two methods to improving efficiency of boiler system. The one is Non-Investment Point method, where not need adding expense to improving energy process by installing of the new equipment in the system ,nevertheless it is significan mean .  From perceiving experience-data sources, about 10 % - 20 % losses can be saved by non-investment point method. Key Word : Boiler, Efficiency, Non-Investment Methode  
APLIKASI TUNGKU TAK PERMANEN UNTUK PENGERINGAN BLOK BATA MENTAH Sediono, Windu; Darmanto, Seno
Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Vol 1, No 1 (2012): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 3 2012
Publisher : Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik

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Abstract

Penelitian tungku model tak permanen dilakukan untuk menganalisa peningkatan fungsi sebagai media pembakaran dan pengeringan. Perancangan model tungku tak permanen dilakukan di laboratorium dan pengujian model tungku dilakukan di industri bata merah kecamatan Jogonalan kabupaten Klaten Jawa Tengah. Tahapan penelitian terdiri dari persiapan blok bata, pengeringan awal bata, pembuatan bata yang akan dibakar, pembuatan tungku, pembakaran dan pembongkaran tungku. Dan berdasarkan hasil uji pembakaran bata merah menunjukkan bahwa dinding tungku tak permanen akan maksimal dengan pola 2/2 di mana pola tersebut menghasilkan lebih dari 9000 blok bata kering untuk ukuran tungku 8 m x 6 m dan ketinggian 20x (kali) tinggi blok bata.Key word: bata merah, tak permanen, pola, tungku, pembakaran, pengeringan
APLIKASI KOLEKTOR MATAHARI MODEL PLAT DATAR UNTUK PROSES PENGERINGAN Darmanto, Seno; Senen, .
Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Vol 1, No 1 (2012): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 3 2012
Publisher : Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik

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Abstract

Penelitian plat datar sebagai pengumpul kalor matahari dilakukan untuk menganalisa tingkat efektifitas penyerapan kalor dan aplikasinya untuk proses pengeringan. Tingkat efektifitas didasarkan pada bahan dan ukuran plat datar, pengaturan posisi, bahan yang dikeringakan, temperatur dan efisiensi. Perancangan alat pengeringan dengan kolektor matahari dilakukan di laboratorium dan pengujian unjuk kerja dilakukan dengan mengeringan salah satu produk makanan pada waktu siang hari dengan waktu efektif 5 jam. Dan berdasarkan hasil uji unjuk kerja prototipe plat pengumpul kalor dengan ukuran 2 mx 1,2 m x 3 mm menunjukkan bahwa temperatur di ruang kolektor dapat mencapai ±50oC.Key word: plat datar, pengumpul, kalor, temperatur, efisiensi, pengeringan
PENINGKATAN KUALITAS PENGERINGAN IKAN DENGAN SISTEM TRAY DRYING Setyoko, Bambang; Darmanto, Seno; Rahmat, .
Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Vol 1, No 1 (2012): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 3 2012
Publisher : Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik

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Abstract

Pada musim panen ikan, nelayan mendapatkan ikan teri dengan jumlah yang sangat besar. Karena sangat banyak, ikan tidak dapat terjual habis. Hal ini mengakibatkan ikan membusuk jika tidak disimpan di tempat pengawetan atau cool storage. Salah satu cara yang digunakan nelayan untuk mengawetkan ikan adalah dengan mengeringkan ikan teri secara alami dengan dijemur di bawah sinar matahari. Proses pengeringan demikian mempunyai banyak kelemahan antara lain membutuhkan waktu lama, memerlukan tempat luas, kualitas ikan menurun karena debu, lalat dan gangguan binatang. Untuk meningkatkan kualitas produk ikan kering maka diperlukan alat pengering tepat guna yang dapat meminimalisir kendala di atas. Pengeringan adalah pengeluaran air bahan hingga mencapai kandungan air tertentu agar kecepatan kerus bahan dapat diperlambat. Proses ini dipengaruhi oleh suhu, kelembaban udara, kecepatan aliran udara, kandungan air yang diinginkan, energi dan kapasitas pengeringan. Alat pengering yang digunakan menerapkan sistem tray drying (pengering tipe rak) konveksi paksa, dimana sirkulasi udara panas dan uap air ikan dibantu blower. Produk diletakkan pada rak yang tersusun agar dapat dikeringkan dengan sempurna. Sumber panas pengeringan dihasilkan dari tungku berbahan bakar batu bara. Sirkulasi udara panas melalui 4 lintas dan pembuangan uap air dilakukan secara paksa dengan exhaust fan yang diatur pada kecepatan 0, 0,8, 1,4 dan 2,8 m/s. Waktu pengeringan tercepat yang dapat dicapai adalah 2 jam 45 menit dengan kecepatan fan 2,8 m/s, kadar air akhir 19,57 %, batu bara 1,95 kg, kapasitas 5 kg, efisiensi kalor 59,7 % dan temperatur rata-rata ruang pengering 85o C. Pengeringan tanpa fan dengan kapasitas 5 kg membutuhkan waktu 6 jam, kadar air 21,42 %, effisiensi thermal 39,8 % dan batu bara 3,05 kg. Pengeringan dengan kecepatan fan 2,8 m/s, kapasitas 25 kg membutuhkan waktu 12 jam, kadar air 18,46 %, effisiensi thermal 63,16 % dan batu bara 6,3 kg. Produk ikan teri kering yang dihasilkan bersih, berwarna coklat muda cerah, renyah, gurih dan tidak berbau asap. Bahkan produk ikan teri kering ini bisa dikonsumsi secara langsung karena sudah matang dan higienis.Kata kunci : tray drying, pengering ikan teri.
PENINGKATAN KEKUATAN SERAT SERABUT KELAPA DENGAN PERLAKUAN SILANE Darmanto, Seno
T R A K SI Vol 11, No 1 (2011): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (494.909 KB) | DOI: 10.26714/traksi.11.1.2011.%p

Abstract

Research is done to analyze treatment (physical and chemical) inincreasing quality of coir fiber. Sequential of coir fiber research is done withdetermining characteristic of physically coir fiber, methd of making single fiber, treatment technical and testing of strength. Determining of physically coir fiber characteristic is done by observing and measuring dimension directly and tesling water content. Then making of single fiber is done by selecting of coir fiber, washing, dryrng and brushing/shaving, Treatment of physically coir fiber is begun from coir fiber in outer shell of coconut to single fiber. Kind of physically treatment consists of washing, soaking, natural drytng and supervised drying. Iilashing and soahng use water. Nalural drying of ccir fiber is done wheit coir fiber is outer shell of coconut. Supervised drying is done with hot air in +45'C of tempemture. The next, washing, soaking and supervised drying is done to preryrecoir fiber that will be used to chemical treatment. Chemical treqtment is done with silane method. Silane treatment for single coirfiber is done with using silane agent solution. The silane solution is arranged with concentration variation 1%, 2%, 3%, 494up to l0%. Silane treatment uses methanol as solvent. Testing of single coir fiber is done accordingwith refer JIS number R7601 for single fiber. And testing of tensile shows that silane treatrnent will trend to increase strength. The increasing of coir strength andwill be optimum in concentration 7%o of silane agent.Key word: coirfiber, silane treatment, strength
ANALISA UNJUK KERJA BIODIESEL KAPUK RANDU Darmanto, Seno
T R A K SI Vol 10, No 2 (2010): TRAKSI
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (186.547 KB) | DOI: 10.26714/traksi.10.2.2010.%p

Abstract

This research is carried out to analyze the production of ceiba petandra biodiesel and performance examination in diesel engine. Production of ceiba petandra biodiesel is carried out with transesterification method and alkali catalyst. Transesterification reaction uses methanol and NaOH catalyst. The performance examination is carried out with engine test bed. Engine test bed consists of diesel engine, generator, load and instrumentation. Production of ceiba petandra biodiesel by transesterification method shows the conversion of ceiba petandra biodiesel reaches 90% in condition 50oC ? 55oC and material composition consist of 80% of ceiba petandra oil, 20% of methanol and 2 gram NaOH per 100 ml methanol. The performance examination in engine test bed with biodiesel of ceiba petandra shows efficiency reach about 20% to mixture of biodiesel B5 and B10. Key word: ceiba petandra, transesterification, biodiesel and efficiency.
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.
ANALISA PEMADATAN TANAH LIAT DENGAN MESIN EXTRUDER Darmanto, Seno
ROTASI Volume 8, Nomor 3, Juli 2006
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (178.714 KB) | DOI: 10.14710/rotasi.8.3.20-23

Abstract

Research is done to analyze work performance of extruder machine to compress clay for red brick. Theanalyzing work performance of extruder machine is based on dry density of clay and water content. Research is done inindustry and laboratory with doing observation and taking specimen of clay that had been given treatment in extrudermachine. And based on analyzing data it shows that dry density of clay in extruder machine is in range 1.45 gram/cm3 ?1.55 gram/cm3 and water content can be range 27% -31%.
ANALISA KARAKTERISTIK BIODIESEL NYAMPLUNG Darmanto, Seno; Sediono, Windu; Sarwoko, Sarwoko; Triyatno, Triyatno
Gema Teknologi Vol 16, No 4 (2012): October 2011 - April 2012
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (36.37 KB) | DOI: 10.14710/gt.v16i4.4784

Abstract

Seno Darmanto, Windu Sediono, Sarwoko, Triyatno, in this paper explain that making of callophylum inophylum biodiesel fuel is done alkaly transesterification methode. Alkaly transesterification methode use methanol and basa (NaOH) of catalist. Procedur and setting of research that is consisted in material selection, treatment and setting of composition of methanol and catalist, operational temperature, reaction time, speed and mixer technical will effect quality and conversion level of callophylum inophylum biodiesel. And based data analyzer show that conversion of callophylum inophylum biodiesel can reach 90%. Properties of callophylum inophylum biodiesel show viscosity and flash point of callophylum inophylum biodiesel is ligthly higher than diesel fuel. And caloric value of callophylum inophylum biodiesel is slightly lower than diesel fuel. Key words: callophylum inophylum, biodiesel, properties, transesterification.
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