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SIFAT MEKANIK DARI BIOKOMPOSIT FILM PATI UBI KAYU DENGAN PENGUAT SERAT AKAR BUAH NAGA (HYLOCEREUS POLYRHIZUS)
Get PDFDragon fruit root fiber used as a reinforcement in the biocomposites film of cassava starch. The production method of biocomposites film was solution casting. The cassava starch serves as the matrix in the biocomposites film. The variation of amount fiber in matrix was 2, 4 and 6% from dry starch weight basis. Isolation of dragon fruit root fiber used alkalization and bleaching process with NaOH, NaClO2 and CH3COOH, respectively. Glycerol was used as plasticizers. Mechanical properties of biocomposites was determined by tensile test. The result shows that, tensile strength increased 200% after the addition of 6% fiber compared to pure starch film. Tensile test data was supported by X-Ray Difraction (XRD).
Keywords: Biocomposite, Cassava Starch, Dragon fruit root fiber, Mechanical properties, XRD
ANALISIS PENGARUH TEBAL PELAT WELDING REPAIR PADA KEMUDI KAPAL (RUDDER) TERHADAP EFEKTIVITAS MANUVER KAPAL DENGAN
Get PDFShip maneuverability is the ability of the ship to rotate and change direction in all conditions of the water when the rudder (steering) turns to form a certain angle; there is a change in pressure, speed and direction of fluid flow, this causes changes in the course of the ship. Corals that produce the rudder of the vessel to crack or break because of the impact of the rock at that time the rudder needs a repair.
Repair on the rudder of the ship is usually carried out on the leaves and sticks of steering, one of the repairs processes is by welding, but if the rudder undergoes a reparation process many times, it will cause changes in metallurgical material due to excessive heat treatment. In the process of repairing the rudder, the new plate used to improve the maximum is 1 mm with an old plate, and the rear side of the rudder experiences a higher load because in this part the flow distribution is stacked from the front of the rudder. The results of this study are repaired rudder experiencing an increase of 16% -18% drag and lift force, the faster the ship runs, the higher the drag and lift force so that the resistance is also greater
Keywords: Rudder, Maneuver, Repai
PENGARUH BAYANGAN TERHADAP OUTPUT TEGANGAN DAN KUAT ARUS PADA PEMBANGKIT LISTRIK TENAGA SURYA (PLTS)
Get PDFElectrical energy is a very important requirement for the community, along with the development of the era and technological advances that are urgently needed, the need for electrical energy is very large, while the source of electricity that is currently being used still uses energy derived from fossil fuels. As we know that the source of energy derived from fossils is very limited, therefore other energy sources are sought or we are more familiar with renewable energy, one of which is the energy source that comes from the sun, which is better known as solar cell. The electricity from this solar cell is very dependent on sunlight which must illuminate the solar panels so that solar energy can be converted into electrical energy. The output from these solar panels is in the form of voltage and electric current. Some factors that can affect the amount of output or output voltage of electric current in PLTS is, temperature, shadow, (cloud condition, and surrounding environment), and wind speed. Therefore, the purpose of this research is to find out how much the shadow effect on the output voltage and electric current produced by PLTS. It is expected that this research can increase the knowledge of energy derived from the sun in this case the solar cell and know the effect of the shadow on the output voltage and electric current from solar panels.The results showed that there was a shadow effect on voltage reduction and current strength in the PLTS system, namely the 10% shadow area and 12.44 volt DC solar panel current and 2.54 amperage, 100% area covering the voltage output panel and the current of solar panels 12.10 volt DC and 0.22 amperage. The area of the shadow that covers the solar panel affects the output voltage and the strong current of the battery that is the area of the shadow 10% voltage and strong current battery 12.35 volt DC and 18.54 amper, 100% area cover the output panel voltage and strong current battery 11.90 volt DC and 13.85 amperes The shadow area covering the solar panels influences the output voltage and current strength of the inverter, namely the area of the shadow 10% voltage and 226.4 volt AC inverter current and 0.97 amperage, 100% covering the output voltage panel and 220.2 volt AC and 0.66 amperage current.
Keywords: Electrical energy, Solar cell, Shadow (cloud condition
ANALISA PENGARUH PERSENTASE CAMPURAN JARAK PAGAR (JATROPHA CURCAS) DAN KAPOK (CEIBA PETANDRA) BIODIESEL TERHADAP PERUBAHAN SIFAT BAHAN BAKAR
Get PDFTo increase the production of biodiesel from non-edible vegetable oils, it is one of the effective ways to solve the limited number of traditional raw materials and the high prices of these raw materials. The primary objective of this study was to optimize the production of biodiesel derived from non-edible raw materials, namely J. curcas and C. Pentandra. The production process is carried out through the esterification and transesterification process of the mixture of J. curcas and C. Pentandra oils. The results of the study indicate a change in biodiesel properties due to the mixing of raw materials. But overall, the mixture of J. curcas and C. Pentandra oils have characteristic features that are suitable and meet the requirements given in the D6751 ASTM and EN 14214 standards.
Keywords: alternative fuels; optimization; non-edible oil; biodiesel mixtur
PEMBUATAN GENTENG BERSERAT TANDAN KOSONG KELAPA SAWIT
Get PDFThe utilization of oil empty bunches palm (EFBP) is limited, while the supply of EFBP is abundant. The most utilization of EFBP is in agriculture, while EFBP fibers have the opportunity to be developed in the field of engineering, for example as a composite material reinforcement material. In the construction field, EFBP fibers can contribute as a mixture of substances for cement tile products. The purpose of adding fiber is to distribute the stress on fibrous cement roof tiles. With evenly distributed stress, the strength of the tile will be higher. The production process of EFBP fibrous cement board is carried out without combustion, with materials in the form of portland cement, marble powder, CaCo3 powder and EFBP fiber and water. Based on the mechanical test that the fibrous EFBP tile can still be applied as a roof, this is evidenced by the majority of its mechanical properties meeting SNI standards. However, fibrous EFBP roof tiles have a flame spread value of 61.5 which means that they still need to be repaired so that the tile is not flammable. Thus, EFBP fibers can be used as an alternative fiber cement tile in order to improve product quality.Keywords: cement tile , fibre, EFB
OPTIMASI PARAMETER PEMESINAN WIRE ELECTRIC DISCHARGE MACHINING BAJA PERKAKAS SKD 11 MENGGUNAKAN METODE TAGUCHI
Get PDFEDM wire is one of the non-conventional machinings that is currently widely used in the manufacturing industry because it can process workpieces with hard material and also produces excellent dimensional accuracy. This research was carried out with variable current, voltage and wire speed processes. While the response variable is the material removal rate and cutting width (kerf), this study aims to determine the effect of each factor on each response as well as on the combined response and to find the right combination of parameters to produce optimal response values. The results of the study stated that the current strong factor contributed 89.84% and the wire speed factor was 8.26% against the cutting width response (kerf). The current strong element contributes 87.88% to the material removal rate response. As for the combined response, the influential factor was wire speed with a contribution of 92.79%. The optimal combination of parameters in the combined response is 7 amperes, 5 volts and 10 m / s wire speed. The conclusion of this study informs that the smaller the current strength, the better the value of the cutting width, while the more significant the current force will result in a higher removal rate material. The factor that influences the combined response is wire speed, where the increase in the value of the wire speed increases the amount of the Gray Relational Grade from the combined response.
Keywords: Wire EDM, SKD 11 Steel, Taguchi, Optimizatio
RANCANG BANGUN AUTOMATIC AUDIO FREQUENCY FOLIAR FERTILIZATION SEBAGAI TEKNOLOGI ALTERNATIF UNTUK MENINGKATKAN HASIL PRODUKTIFITAS TANAMAN
Get PDFAutomatic Audio Frequency Foliar Fertilization is a technology that improves between the nutrients performed on plant leaves by giving the sensation of sound waves in plants. Automatic Audio Frequency Foliar Fertilization is technology device leaf fertilizer integrated with Sound waves which will run automatically, more practical and compatible. This technology device consists of two main devices of active speakers that will issue a sound with a certain frequency and sprayer fertilizer. The results of the tests that have been done to produce the sound frequency between 1200 Hz up to 1600 Hz with average noise of 5%, with the debit of nutrient spraying for the plant of 96 ml per 30 seconds. Giving exposure treatment Wave The sound of classical music with the provision of nutrients in mustard plants by Automatic Audio Frequency Foliar Fertilization gives a real effect on the growth of the average height of the plant is 2.14 cm per 2 days.
Keyword : Automatic, Audio Frequency, Sparye
PENINGKATAN NILAI PRODUK PADA KELOMPOK USAHA KECIL PENGEPUL BARANG BEKAS DI KECAMATAN AMBULU DAN KECAMATAN JENGGAWAH KABUPATEN JEMBER
Get PDFWaste is waste that is caused by human activities and consumption. Garbage has become an old problem faced by cities in Indonesia, including the town of Jember. The small business group BAROKAH and FAIQ JAYA are small business groups engaged in the collection of used goods (waste) in the Ambulu and Jenggawah Districts of Jember Regency, which consist of garbage collectors. The types of used products that are accommodated are non-organic waste such as scrap metal, waste/paper, and plastic waste, where the plastic trash and other garbage are collected, and recycling processes can still increase the selling value.
This activity aims to increase the value of selling products, income, and knowledge of small business groups as activity partners. The plan for this activity is carried out by holding a plastic garbage crusher, a special cart of chemical, organic waste, and training activities in waste management, garbage utilization training, operational training tools, and equipment maintenance training. The method of implementing this activity is field observation, socialization, discussion with activity partners, designing and manufacturing tools (plastic garbage crusher and organic / non-organic carts, waste management training, waste utilization training, operational training tools, tool maintenance training, and monitoring evaluation of activities.
From this activity 1 (one) unit of plastic waste crushing machine has been produced to increase the selling value of plastic waste, 2 (two) groups of organic / non-organic waste bins to streamline the garbage collection process, the activity partners have received training-training waste management, waste utilization training, operational training tools, and tool maintenance training, so that knowledge of increasing product selling value and partner income can increase.
Keywords: Plastic Wast