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All Journal Jurnal Energi Dan Manufaktur ROTOR: JURNAL ILMIAH TEKNIK MESIN JTERA (Jurnal Teknologi Rekayasa) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Multitek Indonesia : Jurnal Ilmiah Jurnal Elemen J-Proteksion: Jurnal Kajian Ilmiah dan Teknologi Teknik Mesin Jurnal Abdi Insani Jurnal Ilmiah Teknik Mesin Poros

Digdo Listyadi, Digdo

Jurusan Teknik Mesin Fakultas Teknik Universitas Jember Jl. Kalimantan 37 Jember 68121

Author-ID : 488575

Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Other

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PENGARUH BASIC SEDIMENT AND WATER TERHADAP LAJU KOROSI PIPA X52 DAN A53 PADA MEDIA OIL SLUDGE. Naufan Arviansyah; Sumarji Sumarji; Digdo Listyadi Setyawan
ROTOR Vol 10 No 1 (2017)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

This research have a purpuse to know corrosion rate in pipe X52 and A53 at oil sludge media caused BS and W. Corrosion is a damage of metal that occurs because reaction between metal with environtment and produce unwanted of corrosion product. Pipe X52 and A53 is a type of low carbon steel that use for fluid transportation system in industry. Oil sludge is a sediment of crude oil from main gathering storage and containing variouses elements. Oil sludge have a one of element is Basic Sediment and Water that is can make corrosion happen to distribution pipes. Measuring Method used in this research is weight loss method. The result of corrosion rate in Oil Sludge media containing 30,17% BS and W for pipe A53 is 1,64 x 10-2 mmpy and the result for pipa X52 is 2,47 x 10-2 mmpy. The result of corrosion rate in Oil Sludge media containing 60,67% BS and W for pipe A53 is 2,12 x 10-2 mmpy and for pipe X52 the result is 3,13 x 10-2 mmpy. The result of this research showed pipe A53 have more resistance than pipe X52. The corrosion is classified as uniform corrosion. Keywords : A53, Weight Loss, Oil Sludge, X52.

PENGARUH VARIASI BEBAN PENDINGIN TERHADAP PRESTASI KERJA MESIN PENDINGIN DENGAN REFRIGERAN R12 DAN LPG Moch. Rizal A. Y.; Nasrul Ilminnafik; Digdo Listyadi
ROTOR Vol 6 No 1 (2013)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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In this research discusses the influence of the cooling load variations on job performance refrigeration includes refrigeration capacity, coefficient of performance and cooling time, the compressor, the impact of refrigeration and compression work with refrigerants R12 and LPG. This study uses a variation of the load is light 20watt, 40Watt, 60Watt, and 80watt at the time of the study for 30 minutes for each of the cooling load, the file retrieval is done use the cooling machine refrigerator sanyo type with dimensions of 90 cm x 45 cm x 45 cm. The results showed the optimum value of COP (coeficient of Performance) of the fridge that I use on the refrigerant R12 and LPG with a load of 40 watts and 30 minutes was 4.75 for R12 and 5.00 for LPG,Obtained that use LPG refrigerant temperature produced less than R12 at the same time that is 30 minutes, the temperature on LPG without cooling load is 10 oC, the load is 11 oC 20 watt, 40 watt load by 12 oC, 60 watt load of 15 oC, and for a load of 80 watts by 17 oC and R12 produced no load temperature is 12 oC, 20 watt load as big as 13 oC, 40 oC as a 15 watt, 60 watt load of 16 oC, and for a load of 80 watts of 18 oC it is seen that the use of LPG refrigerants better because it has a pretty good engine performance compared to R12 views of COP obtained from the same load. Key word: Cooling load ,COP, LPG, refrigerant

ANALISIS VARIASI TIPE EVAPORATOR DENGAN REFRIGERAN LPG TERHADAP UNJUK KERJA MESIN REFRIGERATOR Alif Puspita Ningrum; Digdo Listyadi R.
ROTOR Vol 9 No 1 (2016)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Refrigeration system is a system working for cooling temperature some goods or room with absorbs the heat. Refrigeration process is very important for store a food and beverage so will be able to keeep up in certain time, refrigerator development has achieve characteristic improvement about non-ODP (Ozone Depleting Potential) and non-GWP (Global Warming Potential) refrigerant as well as alternative refrigerant until now. The purpose of this research is to know about effect from variation evaporator type using LPG refrigerant againts refrigerator performance. Experimental methode did for the direct test to analyzed how much effect from variation evaporator type that are used in (serries one space, ser series two space, parallel one space, and parallel two space) useing C plate evaporator and compressor ¾ pk . This research are do it by installing an evaporator in each unit of refrigerator chamber top part and refrigerator chamber bottom part that arranged by series and parallel which is in each chamber have a breaker or without breaker. The result from the research variation of evaporator type for refrigerator is to know how much the effect of refrigeration, compression working, refrigeration capacity, and Coefficient Of Performance (COP). The lowest temperature is shown from evaporator type series one space, that have a value -21,2 OC. The lowest interval from both of chamber type is shown from evaporator type parallel two space, that have a value 3,64 OC. Coefficient Of Performance (COP) from series type is 9,06 for one space and 9,01 for two space, then from parallel type is 10,59 for one space and 13,43 for two space. Based from research the acquired result that is from using evaporator series type and parallel type is could be used for cooling down several room in refrigerator.

ANALISIS VARIASI MEDIA PENDINGIN KONDENSOR TERHADAP RASIO PELEPASAN KALOR DAN COEFISIEN OF PERFORMANCE (COP) PADA MESIN PENDINGIN Digdo Listyadi Setyawan; Eko Widodo; Hasby R
ROTOR 2016: ROTOR Special Edition
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Household refrigerating machine (refrigerator) is a household appliance that is widely used in the family in Indonesia. The condenser is one of the essential components of the refrigerator that functions as a heat exchanger which is composed of the equivalent gas-phase refrigerant into a liquid. A crucial element of the condenser to cool the evaporator with the faster is the rate of heat release, coefisien of performance (COP). This research was conducted by varying the experimental cooling medium in the condenser of household refrigerating machine (refrigerator), such as the natural air cooling medium, the addition of fins and additional fan area 14,4 Watt. It aims to improve the coefficient of achievement refrigeration, heat release ratio and cooling rate speed. The results showed a coolant condenser with fan 14.4 W produces the highest COP value, 4,73, and the ratio of the smallest heat release ratio, 1,2. The larger the COP and the smaller pelepasn calorific value, indicating that the machine work better. Keywords : media pendingin kondensor, rasio pelepasan kalor, COP, mesin pendingin

PENGARUH VARIASI JENIS PENDINGIN DAN KEDALAMAN POTONG PADA PROSES BUBUT BAJA ST60 TERHADAP UMUR PAHAT Ahmad Khoirul Anwar; Digdo Listyadi; Dwi Djumhariyanto
ROTOR Vol 12 No 1 (2019)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Turning machining process is a warkpiece diameter reduction by using chisel cut to produce the shape of the workpiece on a turning, there are various types of machining turning chisel pieces on the turning chisel types include carbide, CBN, and insert. There are also other types on conventional chisel on a turning process, one of which is a turning type of high speed steel (HSS), the turning is widely used in coventional production processes for other than low cost is also easy to grinding. Parameter in this research is coolant and depth of cut. The coolant used is dromus, ex-oil, ex cooking oil. The depth of cut used is 0,3mm, 0,5mm amd 0,8mm. The highest of tool life in this reserch with dromus as coolant at 0,3mm depth of cut is 83,17 minutes. With ex-oil at 0,3 depth of cut the tool life is 70,79 minutes. And with ex-cooking oil the tool life is 56,77 minutes with 0,3mm depth of cut. While the lowest tool life be obtained with ex-cooking oil coolant at 0,8mm depth of cut is 38,90 minutes. So, the canclusion dromus is a batter then ex-oil and ex-cooking oil. This is caused when the dromus as coolant can mixed with water and become one so can get down temperture of chisel.

PENAMBAHAN DAN VARIASI DIMENSI SIRIP ALUMINIUM PADA TUBE TERHADAP LAJU DAN EFEKTIVITAS PERPINDAHAN PANAS DALAM HEAT EXCHANGER TIPE SHELL AND TUBE Rohman T.; Hary Sutjahjono; Digdo Listyadi
ROTOR Vol 6 No 2 (2013)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Heat exchanger is a device that serves to change temperature and the phase of fluid. By utilizing heat transfer between two fluids with different temperature from the higher temperature fluid to a lower temperature fluid. This study aims to determine the effect of the addition aluminum fins and dimensional variations on the effectiveness shell and tube heat exchanger. Heat Exchanger was tested by varying the dimensions of the aluminum fins on the tube from the tube without fins, fin tube with a length of 10 mm, 20 mm, and 30 mm. Tests carried out in counter flow so that the heat transfer rate will be better than the directional flow. Of the test will come out hot fluid temperature and cold fluid temperature out. The results showed decreases in the rate of heat transfer fins greater dimension and the dimension of the highest effectiveness without fins. The highest effectiveness is 25.85% in tube without fins. It can be concluded that the addition of fin in this research will reduce the effectiveness of the heat exchanger shell and tube type. Keywords: Aluminum, effectiveness, fin dimension, heat exchanger

Pengaruh Rasio Ekuivalen terhadap Traveling Speed Stationary Flame pada Meso-scale Combustor dengan Sudden Expansion Rachmad Dwi Fitriansyah; Digdo Listyadi Setyawan; Gaguk Jatisukamto
STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 1 No 1 (2018): JURNAL STATOR
Publisher : STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin

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The flame on a meso scale combustor has different stability and speed levels according to the regime flame and its characteristics. This study aims to examine the effect of the equivalent ratio of LPG and air gas to the traveling speed stationary flame on a meso combustor with a sudden expansion. The research tool used is a combustor with a diameter of a sudden expansion of 6 mm and a length of 20 mm expansion, mixer and pisco tube channels. The research parameters include fuel discharge, air discharge and flame regime where the fuel and air discharge is varied to get the regime flame and its characteristics are traveling speed. Flame regime visualization by photo flame of video cut off per frame and then processed using video editing software to get traveling speed. The results showed that the observed stationary flame was stationary asymmetric downward at the equivalent ratio ф = 0.82 and ф = 0.86 and stationary symmetric in the equivalent ratio ф = 0.90 and ф = 0.95. The lowest equivalent ratio ф = 0.82 has traveling speed = 4.41 cm / s, and the highest equivalent ratio ф = 0.95 has a traveling speed = 16.68 cm / s. The equivalent ratio ф = 0.82 to ф = 0.95 in the stationary regime flame shows that the higher the equivalence ratio, the traveling speed also increases with the number reaching 16.68 cm / s. Keywords: Meso-scale combustor, traveling speed, stationary flame, sudden expansion,

FABRICATION ALAT UJI ROLLING REISTANCE PADA INNER SINGLE ROW DEEP GROOVE BALL BEARING Ahmad Fittoyo; Digdo Listyadi S.; m. Fahrur Rozy H.
STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 1 No 1 (2018): JURNAL STATOR
Publisher : STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin

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Bearing merupakan salah satu bagian dari elemen mesin yang berfungsi untuk menahan beban pada dua elemen mesin saling bergerak. Setiap benda yang bergerak akan menimbulkan gesekan. Setiap gesekan yang terjadi akan mengurangi nilai dari tingkat efisiensi, sehingga gaya rolling yang dibutuhkan sangat besar, selain itu juga akan mempengaruhi umur pemakaian dari elemen tersebut. Gaya rolling resistance adalah tahanan terhadap benda yang berputar akibat adanya gaya gesekan terhadap permukaan. Besarnya gaya rolling yang terjadi tergantung pada besarnya koefesien gesek antara dua permukaan. Pada bearing bagian yang berkontak dengan ball bearing adalah bagian inner race (bagian alur dalam) dan outer race (bagian alur luar). Pembuatan Alat Uji Rolling Resistance Bearing ini digunakan untuk mengukur gaya tangensial dari inner bearing. Alat ini di desain dengan mengkombinasikan antara alat pengujian bearing sesuai standar ISO/IEC 17025, serta sebuah alat uji laboratorium untuk rolling resistance pada ban, dengan menggunakan drum sesuai standar ISO 8767 dan 9948. Hasil pembuatan alat uji rolling resistance ini dengan mengatur kecepatan putar bearing dengan 532 rpm, sedangkan beban radial sebesar 155 Newton, dan beban aksial sebesar 140 Newton didapatkan gaya rolling resistance pada bearing 628 sebesar 0.142444 Newton, pada bearing 6200 sebesar 0.155069 Newton, dan pada bearing 6201 sebesar 0.300619 Newton. Kata Kunci: Alat Uji Rolling Resistance, Bearing, Standar Pengujian Bearing

PENINGKATAN UNJUK KERJA MOTOR BENSIN DENGAN PENAMBAHAN CAMPURAN LPG-UDARA Agus Subekti Prakoso; Digdo Listyadi Setyawan; Santoso Mulyadi
STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 1 No 1 (2018): JURNAL STATOR
Publisher : STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin

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Internal Combustion Engine (ICE), air-fuel ratio (AFR) are important thing. By adding stoichiometric AFR mixture of air-LPG can improve efficiency of engine performance. This study aims to determine the best performance of petrol engine with addition of air-LPG mixture including torque, horse power, fuel consumption and exhaust emission levels with a fixed carburetor setting. The method of this research is to conduct motorcycle performance test without addition of air-LPG mixture and using addition with variation of 10,20 and 30 ml/min of LPG debit at full throttle for dyno test, idle for exhaust gas analyze and constant rpm every 1000 rpm from 1000 to 9000 rpm for fuel consumption test. The result show LPG 20 ml/min is good at dyno test, LPG 30 ml/min is good at fuel consumption and exhaust gas analyze. This shows that the addition of LPG 20 ml/min is the peak of torque and horse power increase due to the poor volumetric efficiency initiated on 30 ml/min, But LPG 30 ml/min is good at fuel consumption and gas analyze due to the decrease of the vacuum of intake manifold and good homogeneity. Keyword: Air-LPG mixture, internal combustion engine, performance.

FLAMMABILITY LIMIT GAS LPG DAN UDARA PADA CYLINDRICAL MESO-SCALE COMBUSTOR DENGAN SUDDEN EXPANSION Puranggo Ganja Widtyo; Digdo Listyadi Setyawan; Gaguk Jatisukamto; Rachmad Dwi Fitriansyah
ELEMEN : JURNAL TEKNIK MESIN Vol 4 No 2 (2017)
Publisher : POLITALA PRESS

Nyala api pada sebuah combustor skala meso mempunyai batas nyala yang berbeda sesuai dengan jenis bahan bakar, debit bahan bakar dan udara serta geometri combustor. Penelitian ini bertujuan untuk meneliti batas nyala api (flammability limit) pada combustor skala meso dengan sudden expansion. Alat penelitian yang digunakan adalah combustor dengan diameter dalam inlet 4,5 mm, diameter dalam sudden expansion 6 mm dan panjang saluran sudden expansion 20 mm, mixer dan pisco tube serta dengan jenis bahan bakar LPG mix. Parameter penelitian meliputi debit bahan bakar dan debit udara dimana debit bahan bakar dan udara pada combustor dicari titik terendah dan tertinggi untuk mampu nyala. Data debit bahan bakar dan udara tersebut digunakan untuk membuat grafik flammability limit yang merupakan hubungan dari rasio ekuivalen dan kecepatan reaktan. Hasil penelitian menunjukkan rasio ekuivalen terendah pada angka ф = 0,80 dengan kecepatan reaktan V = 12 cm/s dan rasio ekuivalen tertinggi ф = 1,09 dengan kecepatatn reaktan V = 17,98 cm/s. Batas kecepatan reaktan tertinggi V = 19,84 cm/s dan batas kecepatan terendah V = 11,57 cm/s. Grafik flammability limit yang terbentuk pada combustor dengan diameter dalam saluran sudden expansion 6 mm yang menggunakan bahan bakar gas LPG berada pada zona cenderung miskin, karena mempunyai rentang rasio ekuivalen dari ф = 0,80 sampai ф = 1,09.

Co-Authors Achmad 'Ima Duddin Agus Subekti Prakoso Ahmad Adib Rosyadi Ahmad Fittoyo Ahmad Khoirul Anwar Ahmad Syuhri Alfons Erick Perkasa Alfons Erick Perkasa, Alfons Erick Alif Puspita Ningrum Alvin Ulil Amriansyah Anuary Dwi Rosyid, Wafa Prasetia Ardila Dwi Tresna Aris Zainul Muttaqin Bambang Sugiharto Boy Arief Fachri Dedi Dwilaksana Dewi Liesnoor Setyowati Dian Purbasari Dwi Djumhariyanto Fachriza Putra Pratama Gaguk Jatisukamto Gilang Firmansyah, Gilang Hadiatama, Intan Hari Arbiantara Hary Sutjahjono Hasby R Ilminafik, Nasrul Ilmninafik, Narsul Imam Sholahuddin Imam Sholahudin Intan Hardiatama Khamdan Khavivi Kristianta, FX KW, Robertoes Koekoeh M Asrofi M Edoward Ramadhan M Nurkoyim Kustanto m. Fahrur Rozy H. Mahros Darsin Misto Misto Moch. Rizal A. Y. Moch. Rizal A. Y., Moch. Mochamad Asrofi Mochamad Edoward Ramadhan Moh. Wafir Muhammad Trifiananto Nashrullah, M Dimyati Nasrul Ilminafik Nasrul Ilminnafik Naufan Arviansyah Nofal Kharis Nofal Kharis Kharis Noor HS, Skriptyan Nur Koyim Kustanto Oktafian Nanda Nusila Pratama PEP Pratama PEP, Pratama Puranggo Ganja Widtyo Rachmad Dwi Fitriansyah Rahma Rei Sakura Rika Dwi Hidayatul Qoryah Rohman T. Rohman T., Rohman Salahuddin Junus Salwasana, Allisa Santoso Mulyadi Sembada, Iqbal Varian Sholahudin, Imam Sumarji Valerian, Joey Yuni Hermawan

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