JURNAL MESIN TEKNOLOGI
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Coolant circulation improvement on the chip tub of the machine lnc okuma 0002 pt. komatsu undercarriage indonesia
Full text linkIn general, coolant is a cooling medium used to cool workpieces and cutting tools during the machining process. In PT Komatsu Undercariage Indonesia, the LNC OKUMA 0002 chip crankcase contained a lot of stagnant coolants. The factor that causes the coolant to stagnate is that the growl is wasted through the chip conveyor and the coolant is carried along with the growl to the chip. Changing the coolant fluid needs to be done in a certain phase because the use of the coolant for too long causes sand to accumulate. Excessive sand can close the cooling duct system. The quality of the coolant can deteriorate due to heat and a dirty environment. In addition, corrosion on the radiator can also result in the deposition of dirt on the coolant. When this happens, the engine overheats easily and triggers a stall. The repairs that have been carried out are examining and repairing the components of the coolant system by adding a coolant channel and a pump that functions to suck the coolant so that the coolant returns to the LNC OKUMA 0002 engine
Uji performa hybrid turbin angin savonius-darrieus eggbeater
Full text linkThe development of the Vertical Axis Wind Turbine (VAWT) is still a challenge for several researchers in the world and in Indonesia. Due to the potential of the Indonesian coast generally has an average wind speed of 3-7 m / s which is classified as low wind speed and is very suitable for VAWT which operates at low wind speeds. Combining the 2 existing VAWT types is one of the development efforts on VAWT to improve the performance of these wind turbines. Hybrid VAWT Savonius-Darrieus can increase the coefficient of performance (Cp) where the maximum Cp of savonius is 30% while Darriues is 35%. There have been several researchers making the Savonius-Darrieus Hybrid VAWT prototype producing Cp above 35%, but this is still far from the ideal Cp of wind turbines around 59%. The combination variation of 2 types of VAWT still has the opportunity to be investigated with various variations in construction and variations in additional accessories. The research method that will be carried out is the prototype experimental method, with the design and prototyping stages. The prototype was tested at the Mechanical Engineering Laboratory of the Indramayu State Polytechnic by blowing the wind at a certain speed from the wind tunnel that had been prepared in advance. There were 11 samples prepared, namely 4 samples for 3 levels and 7 samples for 4 levels. There were 5 samples that reached a Cp value of 0.58 which was close to the ideal Cp value, but there was no increase in TSR in all samples
Development of new renewable energy hybrid system for simple home electricity purposes
Full text linkThe need for energy has now become a major problem that is increasingly complex in all countries in the world to support their economic growth. These various conditions require the need for new renewable energy that can answer these challenges. Wind energy and solar cells have become one of the solutions to reduce dependence on fossil energy. Wind energy and solar energy are actually the most promising sources of energy considering their sustainable nature and very large amounts to be used as electrical energy for lighting in simple people's homes. A wind turbine is a prime mover that utilizes wind energy to drive the turbine blades which are then transformed in the form of mechanical energy to rotate the turbine shaft. Solar energy is energy in the form of light and heat from the sun, which technology can be applied to a variety of energies, including solar thermal electrical energy. New and renewable energy with hybrid or combined systems for home-scale power plants is very much needed to ensure the continuity of the existence of electrical energy and efficiency. The combined and hybrid system models that have been developed and applied are hybrid solar cells and wind turbines
PERFORMANCE ANALYSIS OF BOILER FEED WATER PUMP SULZER AT PLTU AT PT INDONESIA CHEMICAL ALUMINA
Full text linkIn this research, boiler feed water pump at PLTU PT.ICA has a flow rate capacity of 85 m3 / h which is installed sporadically with a motor to drive the pump. This pump has an important role and the main pump for filling feed water from dearator into the steam drum (boler) which is always used for 2 years with varying flow rates. Data needed for evaluation include pressure and temperature of the suction, pressure and temperature of the discharge, flow rate and electric current. The data were taken starting in January to Maret 2019. Data processing was performed using a centrifugal pump calculations includes head, water horse power (whp), brake horse power (bhp) and efficiency presented in tables and graphs using Microsoft Excel. Boiler feed water pump sulzer during operations 3 months amounted the highest head amounted 1212,23 m, the highest whp amounted 223,25 kw, the highest bhp amounted 237,21 kw and the highest efficiency amounted 95,67 %, while the lowest head amounted 928,53 m, the lowest whp amounted 72,68 kw, the lowes bhp amounted 197,14 kw and thelowest efficiency amounted 36,85 %. Change of performance bfp occur due to changes flow rate and pressure suction which adjust operational needs
DESIGN OF FINISHED GOODS INSPECTION ACCELERATION WITH QCC METHOD AND SEVEN TOOLS TO INCREASE PRODUCTIVITY
Full text linkThe manufacturing industry in the current era of globalization is very strict. Speed to produce products is important now, not only in terms of process. Developing a new product at PT. Surya Toto Indonesia has been running well, only in the process there are still found the exceeded of time or schedule of work plans that have been made. The preparation process for carrying out this test will take more time. Because the test aids have not been prepared or have not been grouped according to the type of finished goods or according to the series. It is necessary to analyze using the seven tool method and assisted by factor analysis to find the dominant cause and corrective action. It was found the old problem in the inspection process was the dress-up process or preparation for the test. Because the test kits are incomplete and not permanent, also the test kits do not have a storage area and lack of employee’s ability to process them. Employee education, complete equipment components, and also need to make permanent test kits and according to the specifications of finished goods. Storage area for the test kits so that it is not scattered and messy
EFFECT OF NUMBER OF TRANSITION METAL CATALYST CELLS MANGANESE CATALYTIC CONVERTER ON EXHAUST BASIS EMISSION OUTPUT CARBON MONOXIDE MOTOR GASOLINE
Full text linkThe technology used to reduce air pollution is using a Catalytic Converter which is installed on the exhaust gas channel (muffler) of gasoline motorized vehicles. This Catalytic Converter serves to accelerate the oxidation of Hydrocarbon (HC) and Carbon Monoxide (CO) emissions, as well as to reduce Nitrogen Oxide (NOx). In this study it was designed in such a way on a laboratory scale by studying the manganese transition metal material as a supporting copper catalyst, to see the ability of the catalyst to reduce carbon monoxide exhaust emissions. This study aims first to examine the ability of the manganese transition metal catalyst as a support for copper (CuMn) and secondly to examine the effect of increasing the number of catalyst cells on exhaust emission output. The first research results obtained were that the Manganese Transition metal catalyst as a supporting Copper (CuMn) was able to reduce the output of Carbon Monoxide exhaust emissions. Second, the addition of the number of catalyst cells on the Copper (Cu) catalyst did not have a significant effect, while the addition of the number of catalyst cells on the Manganese Transition metal catalyst as a support for Copper, from 5 catalysts to 10 catalysts, was able to reduce the output of Carbon Monoxide exhaust gas more significantly. However, in the number of 15 catalyst cells, the reduction in exhaust emissions was not significant
THE MACHINE OIL DRAINER DESIGN IN SMALL MEDIUM-SIZE ENTERPRISES (SMEs) OF FOOD PROCESSING OF CASSAVA CHIPS IN CIAMIS DISTRICT
Full text linkMachine technology is currently playing an important part in supporting small and medium-sized enterprises (SMEs)' growth and continuity. Oil filtration in cassava chips that are fried in SMEs is also a concern as chips which are not durable, moldy, and poorly smelling. A machine oil drainer is therefore required to prevent this so that SMEs can compete internationally according to the target. Further to the above, the researcher would recommend the design of the oil drainer used by SMEs in the production of cassavas chips. The design uses a case study by SMEs. In addition, to find out productivity level, the comparison before and after the use of an oil drainer is measured at the beginning and the end of the study. A case study technique with the chosen sample, namely the processing of cassava chips in the Ciamis Regency, is the analysis tool used. As for the data source, it is obtained by data collection techniques using questionnaires, interviews, observation, and documentation exploration through primary and secondary data collection. It is understood from the outcomes of the above discussion that the Machine Oil Drainer plays a role in reducing the oil content of cassava chips, where it can work and operate efficiently. If it can make food durable, mold-free, and smell rancid with the System Oil Drainer, the consistency and efficiency of cassava chips are thus growing. The Research output is in the form of a Machine Oil Drainer that can assist in the filtering process to minimize the oil content of cassava chips in Ciamis Regency cassava chips SMEs
DESIGN OF REACTOR AND CONDENSOR OF COCONUT SHELL LIQUID SMOKE CAPACITY 35O KG/PROCESS
Full text linkThe problem faced by the coconut shell charcoal business group is that a lot of smoke is produced from the combustion process. The process of processing coconut shells into charcoal still uses the manual method, which is burned using used drums so that the smoke from the combustion process is very disturbing to the surrounding environment. Another problem is the capacity of used drums is very limited, one process can only process 100 kilograms of coconut shells, if the production is 1 ton per day it will take 10 pieces of used drums, this results in inefficient work and requires extra energy. Another problem that is also very disturbing is smoke pollution resulting from burning coconut shells. This smoke pollution is very disturbing to the surrounding environment so it needs special handling to remove this smoke. The entrepreneurs do not yet have the knowledge of technology that can be used to reduce smoke pollution and make processing work more efficient. Therefore, in this study, a research will be conducted on the efficiency of the coconut shell liquid smoke condenser. In this research, 1 reactor and condenser will be designed and built with a capacity of 500 kg coconut shell for each process, the technology used is gasification system and liquid smoke technology uses condenser technology and spiral pipe as smoke condenser. The research method that will be carried out will use the method of design, calculation and the process of making tools
ANALYSIS OF RTRTO60K16 PKX YARN PRODUCTION PROCESS WITH OBJECTIVE MATRIX (OMAX) METHOD
Full text linkProductivity improvement research conducted at PT. XYZ with the core problem of minimizing waste and shortening lead time with the Objective Matrix (OMAX) method. The total percentage of product damage from January to October 2019 was 28.42% and the largest percentage of damage occurred in May amounting to 1009.26 bales of production and 33.89 bales of product damage with product damage percentage of 3.36%. The lowest damage occurred in March where the damage percentage was 2.74% with the number of products as much as 945.24 bales and damage struck as much as 25.88 bales. The results of the application using the objective matrix (OMAX) method are obtained that the selected productivity criteria include: Ratio 1 (Utility working hours), Ratio 2 (Electricity energy consumption), Ratio 3 (Labor utility), and Ratio 4 (Defective product) have a red value which means performance is still below standard performance and has not reached the target
ANALYSIS OF BOILER MACHINERY MAINTENANCE USING OEE (OVERALL EQUIPMENT EFFECTIVENESS ) METHOD IN TAHU ASIN SINAR BANDUNG FACTORY
Full text linkThe boiler engine is one of the strategies in increasing the efficiency of energy use, especially in the process of making tofu, the boiler works as a chemical (potential) energy conversion engine from fuel to heat energy in the form of steam by heating the fuel for that the boiler may always operate with optimal performance , The purpose of this study is to determine the effectiveness of the boiler machine during production, the effectiveness values include availability, performance rate and quality rate, the data analysis method is carried out with the overall method of equipment effectiveness using weekly data, after doing research, the availability value is 89.7%, The value of the performance rate is 87.9%, the engine quality rate shows a result of 99.9%, and the results of the calculation of Overall Equipment Effectiveness are 78.51%, it can be concluded that this value has not reached the standard or in other words the boiler engine needs to be reworked time management good production from wa time of machine operating availability (availability) as well as boiler engine performance from production (Performance rate) to increase the value of Overall Equipment Effectiveness