Logic : Jurnal Rancang Bangun Dan Teknologi
Logic : Jurnal Rancang Bangun dan Teknologi is a peer-reviewed research journal published by Unit Publikasi Ilmiah, Pusat Penelitian dan Pengabdian Masyarakat, Politeknik Negeri Bali, aiming at promoting and publishing original high quality research in all disciplines of engineering and applied technology. All research articles submitted to Logic should be original in nature, never previously published in any journal or presented in a conference or undergoing such process across the world. All the submissions will be peer-reviewed by the panel of experts associated with particular field. Submitted papers should meet the internationally accepted criteria and manuscripts should follow the style of the journal for the purpose of both reviewing and editing.
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<![CDATA[Design and Fabrication of a Fixed Bed Pyrolysis with LDPE Plastic Waste ]]>
<![CDATA[I Made Agus Putrawan]]>;
<![CDATA[I Ketut Gde Juli Suarbawa]]>;
<![CDATA[I Made Rajendra]]>;
<![CDATA[INS Winaya]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 21 No. 3 (2021): November ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i3.179-183
<![CDATA[This paper presents the design of a fixed bed reactor pyrolysis to convert plastic waste type LDPE into condensate oil. The dimensions of the batch type pyrolysis reactor are adapted to household needs and are designed to be easy to operate and transport. From the results at three different pyrolysis temperature variations; 250 oC, 275 oC and 300 oC shows that reactor yields a maximum condensate oil of 45,3wt% at temperature of 300 oC. In addition, the weight of charcoal also decreased along with the increase in operating temperature.]]>
<![CDATA[Design and Construction of Crop Suitability Prediction System Using Fuzzy Logic Classifier Method ]]>
<![CDATA[Meli Gustina]]>;
<![CDATA[Irma Salamah]]>;
<![CDATA[Lindawati]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 21 No. 3 (2021): November ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i3.139-148
<![CDATA[The potential of land in Indonesia which is quite large and has not been used optimally is one of the problems. this study focused on developing fuzzy logic models to predict plants that are suitable for planting on agricultural land to enable the land use more optimal. In conducting this study, there were two stages of implementation, namely hardware design, and software design which included system workflow design using the Fuzzy Logic Classifier method where three input variables were used, namely soil pH, soil temperature, and humidity. The findings of this study are in the form of predictions consisting of eight outputs, namely Unfavorable Land, Spinach, Cayenne Pepper, Beans, Long Beans, Cucumber, Eggplant, and Tomatoo. The prediction results generated were directly displayed on the LCD of the instrument that has been designed.]]>
<![CDATA[Auction Application for Beringkit Animal Traditional Market Based on Android ]]>
<![CDATA[I Gede Galang Surya Prabawa]]>;
<![CDATA[I Nyoman Piarsa]]>;
<![CDATA[Gusti Agung Ayu Putri]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 21 No. 3 (2021): November ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i3.149-158
<![CDATA[Beringkit Animal Market is one of the large traditional animal markets in Bali which is famous for selling superior cows. In addition to selling superior cows, Beringkit Animal Market also sells dogs and various types of poultry such as chickens, ducks and roosters. However, in the midst of the COVID-19 outbreak, traditional markets are considered as the main cluster for the spread of COVID-19 due to the large number of interactions between buyers and traders. The implementation of Community Activity Restrictions (PPKM) has resulted in a lack of income for traders at the Beringkit Animal Market. This study aims to design an Android-based online animal auction application as a medium for buying and selling animals to minimize physical interaction between buyers and traders, the online auction transaction process is chosen because the auction transaction process can bring together traders and buyers in the same online media and make offers up to reach the highest agreed price. The research method applied is the DSRM method or Design Security Research Method, application development uses Android Studio to develop mobile applications, and uses Visual Studio Code to develop web-based systems. Data storage and web server management in this study using MySQL and Laravel. The results of this study are in the form of an Android-based animal auction application that can be used as a medium for transactions between buyers and traders who have gone through the blackbox testing process with the test results as expected.]]>
<![CDATA[Testing of Nutmeg Shell as a Normal Concrete Material in Terms of Volume Weight and Compressive Strength Value ]]>
<![CDATA[Budiman]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 21 No. 3 (2021): November ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i3.129-138
<![CDATA[Normal concrete uses fine aggregate and coarse aggregate with concrete density 2200 kg/m3-2400 kg/m3 with a compressive strength of about 15-40 MPa [1]. The purpose of this study is to determine characteristics of the concrete aggregate and the compressive strength of the concrete design based on the DOE (Department of Environment) method and the SNI Standard. In this research, the use of nugmet shell was varied as follows: 0%, 0,25%, 0,50%, 0,75% and 1% of the cement weight. The results showed that the use of nutmeg shells as a normal concrete affected the specific gravity and the value compressive strength of concrete. The higher the percentage of nutmeg shells, the lower the specific gravity and compressive strength of the concrete. The average value of density to nutmeg shell concrete (NSC) 2254.72 (kg/m3) and normal concrete 2304.32 (kg/m3). The compressive strength of normal concrete is 224.2 kg/cm2 and the nutmeg shell concrete (NSC) the composition of 0.25% and 0.5% obtained by 129.6 kg/cm2 and 140.0 kg/cm2 increases the use of nutmeg shell 0.75% and 1% obtained value of 117.6 kg/cm2 and 118.1 kg/cm2 decreased at the age of 28 days. The compressive strength of normal concrete 22 MPa while the maximum nutmeg shell concrete (NSC) 14 MPa, so it does not meet the quality of normal concrete in general.]]>
<![CDATA[Solar Power System Design Applications for Pool Water Pump Operation at Tourist Accomodation ]]>
<![CDATA[I Gusti Agung Bagus Wirajati]]>;
<![CDATA[I Dewa Made Cipta Santosa]]>;
<![CDATA[Ida Bagus Aditya Jaya Pramana]]>;
<![CDATA[I Putu Gede Suka Haryasa]]>;
<![CDATA[Ida Ayu Gede Bintang Madrini]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 21 No. 3 (2021): November ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i3.159-164
<![CDATA[Utilization of solar energy in Indonesia has begun to bloom. This is due to the fact that Indonesia is located at the equator where the sun is exposed all year round and is a very environmentally friendly energy. Based on this, solar energy is used as an option to meet electricity needs by using a photovoltaic (PV) system. The use of a photovoltaic system as a power provider to operate a pool water pump at a villa in Bali is an example of the application of a photovoltaic system. In this study, A Seri and Parallel photovoltaic arrays were used with a panel system that was integrated with PLN electricity. The angle of inclination and direction of placement chosen in this study is 15° with facing north, which refers to research that, has been done previously. PV designs and a series of control panels that can be accessed via the internet will be described as well. The aim in this research is investigate how photovoltaic design used as a solar power plant which applied to the module can be runing the pool water pump in the villa or tourist accommodation.]]>
<![CDATA[Analysis of Number of Layers and Volume Fraction of Fiber Against Shock Load and Composite Compressive Strength Wind Turbine Propeller ]]>
<![CDATA[Kris Witono]]>;
<![CDATA[Pondi Udianto]]>;
<![CDATA[Heru Prasetyo]]>;
<![CDATA[Sugeng Hadi Susilo]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 21 No. 3 (2021): November ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i3.165-171
<![CDATA[The manufacture of wind turbine blades has a very high risk of failure, especially in the manufacturing section or in this case the material structure. If the structure of the propeller material is not able to withstand the very high pressure and air flow, it will result in the failure of the material structure when it is in use. For this reason, the purpose of this study was to determine the composition of composite materials that have high strength and toughness properties and are suitable for wind turbine propellers. The method used in this research is experimental. The independent variables include the number of layers and the volume fraction of straw fiber. The dependent variables are shock load and compressive strength. Each compression test specimen is made with a gauge length of 100mm, a width of 25mm, and a thickness of 2.5mm. While the impact test specimens are made equal to l25mm long, l2mm wide, l2mm high, and 2mm notch. The results showed that the bending strength of the straw fiber composite with 6 layers had an increasing trend as the number of layers increased. The highest bending strength with the number of piles of 6 layers and the lowest strength with the number of piles of 2 layers. In addition, the volume fraction is very influential on the bending stress of the straw composite matrix. It can be seen that the matrix with a volume fraction of 50% has the greatest bending stress in each number of layers, both 2, 4 and 6. For the impact test, it is found that the optimal number of layers occurs in the number of 2 layers with a volume fraction of 33%. The shock load tends to decrease. Meanwhile, based on the volume fraction, the larger the volume fraction, the smaller the shock load that can be received by the straw fiber composite material.]]>
<![CDATA[Thermal Performance Evaluation of the Variation of Condenser Dimensions for Foodstuffs Transportation Cooling Systems ]]>
<![CDATA[I Gede Bawa Susana]]>;
<![CDATA[I Gede Santosa]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 21 No. 3 (2021): November ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i3.184-189
<![CDATA[The process of sending food using transportation requires a refrigeration system to keep the product fresh. Unsuitable temperatures will cause the transported products to often experience damage so that they are rejected in the mark. To achieve this, it is done through testing using a condenser with several variations of dimensions for a room temperature of 5oC. The dimensions of condenser-1 are (W 23 x H 14) inch2 x 19 mm, condenser-2 is (W 23 x H 14) inch2 x 26 mm, and condenser-3 is (W 23 x H 14) inch2 x 44 mm. The test results show that condenser-3 produces a faster cooling time compared to condenser-2 and condenser-1. Cooling time for condenser-3 is 1160 minutes, while condenser-2 and condenser-1 are 1560 minutes and 1860 minutes, respectively. Condenser-3 provides the lowest compression work of 42.131 kJ/kg compared to condensers 2 and 1, respectively 42.931 kJ/kg, and 46.147 kJ/kg. This has an impact on the COP value, namely condenser-3, condenser-2, and condenser-1 each of 3.437, 3.233, and 2.845. COP at condenser-3 occurs the highest. These results indicate that the largest condenser dimension gives the most optimum thermal performance results. An efficient refrigeration system has low compression work and high COP.]]>
<![CDATA[Analysis of Display Cabinet Design with Commissioning Test for Fresh Sea Food ]]>
<![CDATA[I Dewa Made Cipta Santosa]]>;
<![CDATA[I Gede Nyoman Suta Waisnawa]]>;
<![CDATA[I Gusti Agung Bagus Wirajati]]>;
<![CDATA[I Gede Thio Cahya Dinata]]>;
<![CDATA[I Komang Raditya Cahya Dinata]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 21 No. 3 (2021): November ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i3.190-196
<![CDATA[This research is a design of a display cabinet cooling system with integrated energy from PLN electricity and solar power. This equipment is used for displaying marine fish and other fresh sea food in restaurants or cafes in support of Balinese culinary specialties, namely grilled fish and seafood which are very well known and can be a very extraordinary carrying capacity for Bali tourism. This cooling system is designed to be able to maintain the temperature of the cooling room (cabin) up to -5 oC. This is in accordance with the standards for storing fresh sea fish and sea food in a temperature range of -2oC to 2oC, where fish and sea food are still in a very fresh condition for an average of 1 week. Other standards to maintain product freshness also require room humidity between RH 90% – RH 95%. Furthermore, data collection on system performance is carried out using the commissioning test method to determine the initial performance achievement of the tool so that its shortcomings can be evaluated which will be developed and corrected in further research. From the research, it is found that the temperature achievement is very good, the solar and PLN integration system with the Automatic Transfer Switch (ATS) control system has also worked well where the switch occurs when the battery charging condition is below 30% or below 10V. However, something that has not been achieved is the humidity in this system, the average relative humidity (RH) is 50% so that the final condition of the product becomes dry on the surface of the fish. This relatively low humidity is due to the fact that it still relies on the humidity increase system by opening the cooler cabin door. In the next development, the right humidifier system will be designed for this display cabinet system.]]>
<![CDATA[The Effect of Material Conveyances on Workload, Musculoskeletal Disorders, Productivity and Performance in the Process of Plate Cutting ]]>
<![CDATA[I Nyoman Sutarna]]>;
<![CDATA[I Nengah Ludra Antara]]>;
<![CDATA[Daud Simon Anakottapary]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 21 No. 3 (2021): November ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i3.197-204
<![CDATA[The use of material conveyances that are not in accordance with the concept of ergonomics harm the human body. Repair of work brushes by applying ergonomics to material conveyances can reduce the risk category. The purpose of this study was to determine the effect of material conveyance on reducing workload, musculoskeletal disorders, increasing productivity and performance. The study was conducted using the same subject design method with a sample of 16 workers. The data were analyzed by paired t-test with a significant level of p<0.05. The results of the analysis showed that the PO workload data was 104.4 beats per minute, P1 was 93.5 beats per minute there was a decrease of 10.9 beats per minute or 10.4%, PO musculoskeletal complaints were 80.1 scores, P1 was 70.0 the scores were decreased by 10.1 or 12.6%, PO productivity of 0.201, P1 of 0.355, an increase of 0.154 or 43.4%. The conclusion is that the use of material conveyances means a decrease in workload, musculoskeletal disorders, an increase in productivity and performance. It is recommended to workers to use material conveyances equipment in carrying out transport and material transport activities.]]>
<![CDATA[The Influence of Parking Careers and Parking Facilities on User Satisfaction of Car Parking on Ngurah Rai Street Gianyar City ]]>
<![CDATA[Ida Bagus Wirahaji]]>;
<![CDATA[I Ketut Sutapa]]>
<![CDATA[ Logic : Jurnal Rancang Bangun dan Teknologi Vol. 21 No. 3 (2021): November ]]>
Publisher : <![CDATA[Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali ]]>
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DOI: 10.31940/logic.v21i3.212-217
<![CDATA[Driver satisfaction in making a trip is influenced by the quality of parking services. The purpose of this study was to analyze the effect of parking attendants and parking facilities on the satisfaction of car park users on Jalan Ngurah Rai, in Gianyar City, which is currently working on revitalizing traditional markets with modern concepts. Research using survey methods, distributing questionnaires to obtain 100 sheets of parking service user perception data. The results of the analysis show that the regression equation obtained is Y = 2.354 + 0.281 X1 + 0.672 X2. The parking attendant and parking facilities variables both partially and simultaneously have a significant positive effect on the user satisfaction variable. Value of Sig. variable parking attendant and parking facilities respectively 0.000 < 0.05. The value of tcount for parking attendants and parking facilities are 9,500 and 20.921, respectively > ttable = 1.9872. Fcount = 312.296 > 0.025324. The ability of the parking attendant and parking facilities variable in influencing the user satisfaction variable is quite large, as indicated by the coefficient value. determination (R2) of 86.3%.]]>
