cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Asmara Yanto
Contact Email
Asmara Yanto
Phone
-
Journal Mail Official
asmarayanto@yahoo.com
Editorial Address
-
Location
Kota padang,
Sumatera barat
INDONESIA
Jurnal Teknik Mesin
Published by Institut Teknologi Padang
ISSN : 20894880     EISSN : 25988263     DOI : -
Core Subject : Engineering,
Mechanical Engineering
Jurnal Teknik Mesin (JTM) is a journal aims to be a peer-reviewed platform and an authoritative source of information. We publish original research papers, review articles and case studies focused on mechanical engineering and other related topics. All papers are peer-reviewed by at least two referees. JTM is managed to be issued twice in every volume (April and October).
Arjuna Subject : -
Articles 158 Documents
 8   9   10   11   12 
Development of Ejector Cooling System for Vegetables Products Vacuum Cooling Sulaiman Ali; Desmi Asriandi
Jurnal Teknik Mesin (JTM) Vol 6, No 2 (2016)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (460.066 KB)

Abstract

Nowadays, the development of refrigeration technology is more rapidly, the adicted of people to refrigeration system from year to year is always rising,start from the simple scale (eg,refrigerator) in order to safe foods until the big scale such as in industry. The ejector designed will change the capillar tube function or TXV to improve the AC mechine performance. Theoritically,the use of ejector in this research will increase the effect of refrigeration and decrease compression performance. The increasing work of the system will decrease the eletrical energy consumption at the time the air conditioner work. The test in the research is designed in such a manner, so that it can be operated in standard or conventional condition (the system operates normally by using capilar tube) and in the condition of using ejector and doing cooling vacuum. Based on the test by using AC in kind of split with 2 HP Compressor capacity,it is concluded that there has been increasing of COP (Coeficient Of Performance) after using ejector in refrigeration system with vacuum cooling about 1,2 % and also there is retrenchment use of electricity about 0,01 %.
Effect of the Environmentally Friendly Composite Materials on Physical and Thermal Properties of the Natural Composite Syafrul Hadi; Mastariyanto Perdana
Jurnal Teknik Mesin (JTM) Vol 8, No 1 (2018)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (821.782 KB)

Abstract

One of the most widely used and applied technics materials today is a composite material based on nature. Natural composites are lightweight and relatively strong and environmentally friendly, so composites based on synthetic fibers are reduced in use. This study uses constituent materials derived from shells and bunches of palm oil plant crops that function as reinforcement. Shells and fibers from empty bunch of oil palm plants are made in the form of powder. Matrix used in this research was polyester resin and epoxy resin. The volume fraction between the reinforcement and the matrix is 50:50. The fabrication process of this environmentally friendly composite is compression molding with a pressure load of 30 kg/cm2. This study aims to determine the effect of the type of composite materials on physical and thermal properties of the natural composite. The results show that natural composites are high density composites. The highest density of palm shell/polyester composite is 1,223 g/cm3 and the lowest density of oil palm empty bunch/epoxy composite is 1,021 g/cm3. The highest thermal conductivity of oil palm shell/polyester composite is 0,28 W/m.K. Thermal conductivity composite value is more influenced by binder/matrix of composites.
Design of Undershot Waterwheel Curved Blades as Picohydro Power Plant Generation in Tamangil Village Kristianus Jamlay; Luther Sule; Duma Hasan
Jurnal Teknik Mesin (JTM) Vol 6, No 1 (2016)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (829.386 KB)

Abstract

Utilization of hydropower plants picohydro recognized scale capable of meeting electricity demand, especially in areas not reached by the electricity such as rural areas. This study aims to analyze high waterfall (head), discharge and water resources available as well as the design of a water wheel undershot the current model corresponding curved blade. This research was conducted in the village of Tamangil Nuhuten the main object studied is the flow of the waterfall in the village. Primary and secondary data obtained through this study and Field and Library Research with stages such as the construction of drains, water discharge measurements, high measurement waterfall further analyzed quantitatively while the Library Research stages, namely the study of literature (book review). The results showed that the critical velocity water flow (v = 2.45 m/s), effectively head of waterfall (h = 2 m), the discharge of water used (Q = 0.0392 m3/s), and water power are utilized (Pair = 769.65 Watts). From the design obtained that rotation shaft (np = 78.08 rpm), tangential velocity (U = 2.45 m / s), the angular velocity of water wheel (ω = 8.1724 rad/s), the force on the water wheel (F = 96.18 N), torque at the wheels of water (T = 28.85 Nm), electric power that can be generated by a water wheel (Pwater wheel = 235.80 Watt), as well as maximum power efficiency obtained theoretical water wheel (ηteo = 30 59%) and the efficiency of water wheel axle (ηpra = 85.721%). Based on calculations assuming that there will be changes in water flow rate, it is known several important parameters including torque, mass flow rate, rotation, and power and maximum efficiency of water wheels is increasing. It was concluded that the flow of the waterfall village Tamangil Nuhuten potential to be used as a hydroelectric plant scale picohydro with water wheel underhot the current type and model of blade bent. Among torque, mass flow rate, rotation axis, and the water wheel power is proportional to the maximum efficiency. Hopefully, by the hydroelectric power plants pikohydro scale, it can meet the electricity needs of residents in the Tamangil Nuhuten village.
Effect of Dynamic Load on the Stiffness of Fiberglass and Coir-Based Hybrid Composite Mastariyanto Perdana
Jurnal Teknik Mesin (JTM) Vol 6, No 1 (2016)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (740.16 KB)

Abstract

The composites made from natural fibers have been widely used in the engineering field because the natural fiber-based composites have lightweight nature, relatively strong and environmentally friendly. The use the synthetic fiber-based composites reduced to obtain the environmentally friendly composites. In this study, the use synthetic fibers (fiberglass) reduced by adding coconut fiber (coir) on the composite mix. Composites in this study using the volume fraction of hybrid fiber 12% fiberglass and 18% coir. The volume fraction of fibers and epoxy hybrid is 30:70. This study aims to determine changes in stiffness of the hybrid composites due to dynamic loads. Hybrid composite loaded by 500, 1000, 1500, and 2000 cycles of the dynamic load. The test results show degradation of the rigidity of the hybrid composite. The stiffness decrease like presented by the ratio of E/Eo. The number of cycles of the dynamic load causes a decrease in stiffness hybrid composites. The stiffness of hybrid composites decrease because of dynamic load treatment reaches 30%.
The Effect of TIG Welding for 304 and 304L Stainless Steel to Mechanical Properties , XRD and EDX Characterization as Pressure Vessel Materials Vuri Ayu Setyowati; Eriek Wahyu Restu Widodo
Jurnal Teknik Mesin (JTM) Vol 7, No 2 (2017)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1159.321 KB)

Abstract

The aim of this paper is to analyze the effect of TIG welding for Austenitic Stainless Steel type 304 and 304L as pressure vessel materials. These materials have different carbon content. 304 SS and 304L SS of 6mm metal sheet were used as observed materials. The groove angel for welded specimens is 60o and TIG welding current is 100A. Current and voltage for welding process are set constant. For analyzing mechanical properties, tensile test was used to calculate the yield strength, tensile strength, and elongation. X-Ray Diffraction (XRD) and X-Ray Spectroscopy (EDX) test were used to analyze the phase and element compositions, respectively. The tensile strength of welded 304 SS was decrease to 425,64 MPa compared to 304 SS which is 466,67 MP to 422,22 MPa. The highest elongation of 22% among to welded 304L SS and it has good ductility. Based on, XRD measurements, all specimens have austenite peaks but 304L SS and welded 304L SS have δ-ferrite peaks. EDX measurement was also used to explain the element composition supporting mechanical properties.
Effect of Printing Pressure to Paving Block with 5% Weight of Added Fly Ash on Compressive Strength Nurzal Nurzal; Edison Edison; Krisna Krisna
Jurnal Teknik Mesin (JTM) Vol 6, No 2 (2016)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (888.832 KB)

Abstract

This research aims to investigate the effect of compacting pressure variations with the addition of 5 wt.% fly ash (Fa) on paving block (Pb) in the compressive strength test base on SNI 03-0691-1996. Fa is obtain from waste material produced from coal burning thermal power plant from Sijantang sawahlunto. The growing production of  Fa caused negative environmental impact, so that one of the solutions to overcome that effects is to use the Fa as a raw material for paving block mixture that can reduce the cost of raw material and increase its strength.The fly ash composition in the paving blocks manufacture, that is: 0 wt.%,   5wt.% Fa + block paving material (cement and sand), pressure variation 55, 65, 75, 85 and 95 Kg/cm2 with a drying time for 35 days. The addition of 5 wt.% Fa in paving block is taken based on the results of research conducted in 2013 by using a variation of the composition of 0,5,10,15 wt.% Fa and obtained optimum conditions at 5 wt.% Fa, while the optimal time drying 35 days is taken based on the results of research conducted in 2014 by the drying time variation of 7, 14, 21, 28, 35 days. While the pressure used 75 Kg/cm2, so it is necessary to study based on variations of pressure to get the optimum condition of the paving blocks. Form of test specimens by SNI 03-0691-1996 with paving block size of 20 cm x 10 cm x 6 cm.The test results showed The addition of 5 wt.% Fa increases the compressive strength when compared to 0 wt.% Fa. Optimal compressive strength occurred in paving block compacting pressure 95 kg/cm2 in the amount of 36.1 kg/cm2 with a quality that is used for road on the composition 5 wt.% Fa and 0 wt.% Fa of 30.3 kg/cm2 with quality B parking area. This is because the material fly ash contains oxide compounds that have mechanical properties that are very good and and the size of the fly ash used is very small so as to fill the voids between particles and reduce the porosity of the paving blocks and the higher pressure causes the density of paving blocks increases because bond between the particles is getting stronger. All the results that have made the products meet the quality according to SNI 03-0691-1996.
The Flat Type Heat Pipe Solar Collector: An Experimental Research Dian Wahyu
Jurnal Teknik Mesin (JTM) Vol 6, No 2 (2016)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1024.891 KB)

Abstract

Flat solar collectors with heat pipe absorber with dimension of wide 1.5 m x 2 m lenght x 0.2 m thickness and 2.87 m2 aperture area has been tested to produce hot water. Heat pipe used in flat plate solar collector, has a filling ratio of 20% which has been proven to have the highest ability to transfer heat when tested in previous studies. Testing of solar collectors with heat pipe absorber has been done during the month of April 2016 in the city of Padang by using standard ASHRAE 93-2003. The test results showed the highest efficiency obtained was 46%. To get the hot water of at least 64 ° C with a flow rate of 0,35 L / min for 5 hours, required solar radiation of 750 W / m2. Generally, during the trial obtained water output temperature collectors from 8:00 - 9:00 pm and from 15: 30 - 17: 30 is below 60 ° C, whereas at 9:30 - 15: 30 obtained collector output water temperature above 64 ° C, while the water temperature reached at the highest collector output value of 78 ° C.
Design and Manufacturing of Spinner Machine Using Speed Control Romiyadi Romiyadi
Jurnal Teknik Mesin (JTM) Vol 8, No 1 (2018)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (853.834 KB)

Abstract

The spinner machine was a machine used to reduce the oil content in the foods like chips and can improve the quality of  the food  to be durable. The purpose of the study was to design and manufacture of spinner machine with a capacity of  4 kg. In this study,  the spinner machine was designed and manufactured with a speed control. From the process of designing and manufacturing, has produced a spinner machine with a capacity of 4 kg for a process. The machine uses a electric motor with a power of 0.25 HP. 
Optical Properties Degradation of Organolead Halide Perovskite with Lead Devired from Solder Wire Putri Pratiwi
Jurnal Teknik Mesin (JTM) Vol 7, No 1 (2017)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (854.706 KB)

Abstract

Organolead  halide perovskite material was used as the most common light-harvesting active layer in perovskite solar cell. This material is the most promising material in photovoltaic technology due to its fastest-advancing power conversion efficiency (PCE) to date. The PCE has increased up to 22.1 % only six years after it was discovered in 2009. In our last research, we synthesized and fabricated perovskite solar cell using CH3NH3PbI(3-x)Clx material as light-harvesting active layer. We extract lead from solder wire to produce PbCl2 powder. This powder was used as basic substance for organolead halide perovskite material. CH3NH3PbI(3-x)Clx solution produced by reacting CH3NH3 with  PbCl2 powder in DMF (Anhydrous N,N-Dhymethilformamide) by using solution based method. Based on device performance characterization, we conclude that solder wire is suitable enough for fabricating perovskite solar cell. They have identical characteristic compared to commercial lead. However, both perovskite solar cell using lead from solder wire and commercial lead’s  performance are smaller than published solar cell’s efficiency. Therefore, in this study we investigate that degradation affected perovskite material performance, especially physical appearance and absorbance characteristic.  
A Simple Dynamic Signal Analyzer Virtual Instrument To Monitoring and Control Airflow Temperature Asmara Yanto; Anrinal Anrinal; Ryan Adi Pratama
Jurnal Teknik Mesin (JTM) Vol 6, No 2 (2016)
Publisher : LP2M - Institut Teknologi Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1439.602 KB)

Abstract

This work aims to present a Dynamic Signal Analyzer Virtual Instrument (DSA-VI) for monitoring and control the airflow temperature in a prototype of air duct. Here, the DSA-VI has developed by using LabVIEW software and Arduino UNO.  To investigate the performance of DSA-VI, an experiment has performed to monitoring and control airflow at settling temperature, 40oC, 50oC, and 60oC, respectively by using the DSA-VI. By assuming that an airflow temperature control system as the first order system, the time constant (t) should be inspected as one of the system characteristics. The testing at the settling and surrounding temperatures (Tsp and T0) are 40oC and 28.81oC respectively, obtained value of t is 7.49 s; at Tsp and T0 are 50oC and 29.88oC respectively, obtained value of t is 11.35 s; and at Tsp and T0 are 60oC and 28.81oC respectively, obtained value of t is 19.54 s. By using DSA-VI, the value of t at the transient response can be evaluated. At the steady state response, the airflow temperature has controlled well with the steady state error less than ± 2.5 %.

Page 10 of 16 | Total Record : 158

 8   9   10   11   12 

Filter by Year

2011 2020


Reset
Filter By Issues
All Issue Vol 10, No 2 (2020) Vol 10, No 1 (2020) Vol 9, No 2 (2019) Vol 9, No 1 (2019) Vol 8, No 2 (2018) Vol 8, No 1 (2018) Vol 7, No 2 (2017) Vol 7, No 1 (2017) Vol 6, No 2 (2016) Vol 6, No 1 (2016) Vol 5, No 2 (2015) Vol 5, No 1 (2015) Vol 4, No 2 (2014) Vol 4, No 1 (2014) Vol 3, No 2 (2013) Vol 3, No 1 (2013) Vol 2, No 2 (2012) Vol 2, No 1 (2012) Vol 1, No 1 (2011) More Issue