ASEAN Journal of Systems Engineering
Not a member yet
78 research outputs found
Sort by
SOLAR AND WIND ENERGY MODELLING FOR CENTRAL BANGKA REGENCY, BANGKA BELITUNG PROVINCE
Full text linkCentral Bangka is a developing regency in Bangka Belitung Island Province. Geographically Bangka Belitung Islands is not far from the equator. The development of human resources and infrastructure for the energy sector is an integral part of regional development efforts. To fulfill the district's energy, we need to look at the potential of renewable energy such as wind power and solar power within the district. This research also provides the potential renewable energy capacity configuration through a simulation.This research used the simulation approach method to map the energy demand over the district and renewable energy available in the region. Energy demand data received from the National Electrical Company (PLN) of Bangka Belitung Province, and potential renewable energy data were obtained from the Ministry of Energy and Mineral Resources of The Republic of Indonesia and the NASA website. Software HOMER is used to analyze electrical energy potential from renewable energy sources.The simulation shows wind energy could provide 0.15 – 0.19 kW and solar power at 3.99 – 4.96 kW/m2/day. The optimum configuration of energy supply consists of 61.4% solar energy and 38.6% wind energy. The hybrid configuration above using the solar photovoltaic (PV) output of 286,981 kWh/year and wind generator output of 180,758 kWh/year and an estimated value of 134,548.34 of operational cost, and cost of energy generated at $0.43/kWh.
WIND FARM LOCATION SELECTION AT THE SOUTHERN COAST OF YOGYAKARTA PROVINCE FOR ENERGY SUPPLY OF HYDROGEN FUEL PRODUCTION
Full text linkThe depletion of non-renewable energy reserves and increased awareness of environmental damage caused by fossil-based fuel use have encouraged the world’s efforts to develop and utilize new and renewable energy sources, including in Indonesia, especially in the special region of Yogyakarta. The potential for wind power plants can be developed in 3 districts in the southern part of Yogyakarta, bordering the Java Sea, to be converted into hydrogen through an electrolysis process. The three research locations were Bugel Beach in Kulon Progo, Pandansimo Baru Beach in Bantul, and Baron Techno Park at Baron Beach in Gunung Kidul. The selection of the most optimum location was made employing the Analytic Hierarchy Process (AHP) method by considering three factors, namely technical, location, and socio-economic factors. The first factor includes the potential for electricity generation from wind power and the available land area. The second one consists of sub-factors, namely access to the location and the distance to the PLN electricity distribution line. Then the last one includes conflicts with tourism and the economic activities of the surrounding community. After obtaining the most suitable location, planning is carried out for the wind farm that is built, the amount of electrical energy produced, the cost of generating electricity, and the cost of producing hydrogen from the electrolysis process. Pandansimo Baru Beach is an ideal location, with an average wind speed of 4.833 m/s. Five Vestas V80 2000/80 wind turbines were selected according to the available land. The annual electrical energy that can be produced from this system is 161,677,216 kWh/year with a generation cost of 0.118 USD/kWh and is capable of producing 230,960 kgH2 of hydrogen at 4.35 USD/kg.
MAPPING THE DEGREE OF TECHNOLOGICAL CAPABILITY IN SMALL AND MEDIUM INDUSTRY OF AUTOMOTIVE COMPONENTS
Full text linkThe automotive industry is known to increase exports since 2015 and is predicted to continue to grow. To develop the industry, the government is known to issue several schemes, and one of them is in the form of mandatory rules for partnerships with the small and medium industrial sectors. However, there is no industrial, institutional map seen from various aspects, including technology, human resources, information, and organization. This map is essential and useful for stakeholders to develop the industry because it provides more directed assistance.In this study, the small and medium industries for processing metal automotive components in Tegal City are used as mapping objects. The technometric method is used to calculate the level of technology contribution they have. The results of this study indicate that the four aspects covering Technoware, Humanware, Infoware, and Orgaware for small and medium-sized automotive component processing industries in Tegal City are in a reasonable range. For improvement or guidance, production facility technology is the priority. Then proceed to employee competencies, information systems, and organizational management. Mapping should be done regularly every five years or less than five years as an evaluation
LONG TERM PROJECTION OF ELECTRICITY GENERATION SECTOR IN WEST PAPUA PROVINCE: LEAP MODEL APPLICATION
Full text linkElectricity is one of the crucial infrastructures in economic development. The number of registered customers electricity increases every year based on data from the State Electricity Company (PLN) Manokwari branch office data. Electricity increase because it has become an essential part of everyday life. Therefore, in West Papua, it is necessary to fix this electricity problem where the most significant source is still from fossils. By looking at potential sources in West Papua that are more sustainable and renewable to meet public electricity demand in West Papua.In this study, LEAP software will simulate several scenarios, namely based on data from the RUPTL (Electricity Supply Business Plan) and further digging based on the potential literature in West Papua. There will be three scenarios; scenario 1 uses BAU (Business as Usual) as available in RUPTL. Scenario 2 uses BAU data and adds potential renewable energy. Scenario 3 is not using fossil energy but using renewable energy. The result is West Papua can be 100% electrified in 2025 if using scenario 2. The potential for renewable energy in West Papua is wind and sun. However, it does not rule out other sources, such as hydropower.
POTENTIAL AND FEASIBILITY ANALYSIS OF BIOMASS ENERGY FROM PALM OIL MILLS ON NORTH PENAJAM PASER REGENCY REGION OF THE NEW STATE CAPITAL INDONESIA
Full text linkThis paper presents a techno-economic potential and feasibility analysis on the planning of Biomass renewable energy from palm oil mills on the North Penajam Paser Regency. They were analyzed using the last three years of production data history from 7 Palm oil Processing Factories in the region and using questionnaires and interviews. Total processing fresh fruit brunch is about 891.624 tons/year. Total potential electricity generated from palm oil residue (Fiber, Shell, and Stem) is 28.009 kWh. The factories are located in Babulu, Waru, Penajam, and Sepaku.The assessment of sustainability indicators in this research is considering technology and economic aspects. The technology aspect evaluates the technical planning of installations that are possible to build in the area. For financial aspects of sustainability, evaluates the net present value (NPV), internal rate of return (IRR) and, the payback period of renewable energy installation. This analysis is used to get a comprehensive insight from the potential biomass energy at the research location and conduct a feasibility study based on techno-economic analysis to develop new state capital Indonesia and the supporting regions
APPLICATION OF NEWTON – RAPHSON METHOD TO ANALYZE THERMAL EFFICIENCY OF GAS TURBINE BEFORE AND AFTER ENGINE REPLACEMENT
Full text linkGas turbine performance is one of the main concerns in the operating of industrial plants. Thermal efficiency is vital to analyze the performance of the gas turbine. This research purpose is to analyze the gas turbine's thermal efficiency after performed engine replacement in one of the gas industries in Kutai Kartanegara, East Kalimantan, Indonesia. The data was taken during the period from August 2017 to July 2018, while engine replacement was performed in February 2018. The data were processed to develop simulation models expressing the characteristics of the equipment. The simulation models were then solved simultaneously using the Newton – Raphson Method. A beneficial advantage of Newton Raphson is that it enables to handle a massive number of data and provides faster iteration compare to other methods. Based on the simulation results, the thermal efficiency before performed engine replacement was 23.43% with a net power of 18.109 MW and fuel consumption of 1.640 Kg/s. Meanwhile, the development of thermal efficiency after performed engine replacement was 28.24% with a net power of 18.597 MW and fuel consumption of 1.397 Kg/s. This indicates that after performing engine replacement, the thermal efficiency increased by 4.81% and saved fuel by 0.243 Kg/s
FEASIBILITY STUDY OF MICRO HYDRO POWER PLANT CAPACITY IN BLUMBANG BANJARARUM KALIBAWANG KULONPROGO
Full text linkThe Blumbang micro hydro power plant is a power plant utilizing hydropower that supplies electricity to the Blumbang area. The resulting supply is very large, around 30 kWh. However, it cannot be fully used by the surrounding society. So, it is necessary to do a feasibility study to increase the power capacity to determine supply and demand. This research aims to determine the community's supply and demand, which will impact the potential that can be taken by society.The method used is field observations, supply and demand observations, analysis of differences in supply and demand. The results that the feasibility of increasing the power capacity. It supplies generated from PLTMH Blumbang ranges from 24-26 kWh of the electricity demand of micro hydro power plant, 6 kWh demand electricity of micro hydro power plant and PLN 16 kWh. The Blumbang society's electricity bill has decreased with the Blumbang micro hydro power plant
MODELING AND ANALYSIS OF AC-AC SOFT STARTER FOR INDUCTION MOTOR BASED ON THYRISTOR AND IGBT
Full text linkMotor Starting on large capacity induction motor using direct on-line starting (DOL) method may cause a problem for system. It is due to motor start-up current that can be up to eight times of the nominal current. Soft starter is an induction motor starting method based on power electronic that can significantly decrease motor starting current, resulting in reduced fuel consumption. In this research, a comparison between DOL starting method and two soft starter methods based on thyristor and Insulated Gate Bipolar Transistor (IGBT) is performed. The results show that thyristor based soft starter method with firing angle 90˚ can reduce input voltage from 220 V to 165 V so that the maximum starting current down from 633 A to 265 A. In the same voltage value, IGBT can reduce maximum starting current to only 100
PLASTIC RECYLING IN INDONESIA BY CONVERTING PLASTIC WASTES (PET, HDPE, LDPE, and PP) INTO PLASTIC PELLETS
Full text linkDue to the population growth, economic development, increasing the consumption of products patterns in Indonesia and activities of citizen, MSW has generated by 384 Indonesia cities was about 80,235 ton per day (or 320,940m3 per day). The plastics solid waste (PSW) become to the major concern after organic waste and significantly impact to in environment. In order to solve the problem this research is conducted to identify the potential raw material from plastics, in order to replaces the pure material of plastics pellets that is made from crude oil and minimize the effect bring to environment. This compendium is presented the concept of the appropriation technology for plastics recycling, it emphasize the typical method by converting plastics waste of thermoplastic type Polyethylene terephthalate (PET), High density polyethylene (HDPE), Low density polyethylene (LDPE) and Polypropylene (PP) into plastics pellets. Whereas thermoplastics chemical structure possible for recyclable , the mechanical recycling method is played as the best technology and common used in recycling of conventional plastic waste material into new raw material without changing basic structure. The quality of pellets that reprocess from the plastics waste is based on the effective factors of sorting, washing, drying and temperature of melting in each zones of extruder machin
THE DETERMINATION OF LANDFILL (TPA) ALTERNATIVE LOCATION IN WEST TULANG BAWANG DISTRICT OF LAMPUNG PROVINCE
Full text linkWest Tulang Bawang is one of the new regencies in Indonesia which was a new expanded area that continues to grow. It is followed by population growth rates resulting in increased volume of waste. The landfill (TPA) is an important component of any waste management system. A good waste has several characteristics. To ensure the appropriate selected land, a systematic process must be developed and followed.The study of the selection of the landfill (TPA) is aimed at finding feasible area as the location of the landfill, so that the allocation of the new landfill will be in accordance with local policies in regional spatial planning and meet the criteria of ISO No. 19-3241-1994. The role of Geographic Information System (GIS) in the management of solid waste is important because many aspects of planning and operations are highly dependent on the spatial data. The landfill selection process consists of three stages of filtering, i.e., the feasibility of the environment by utilizing Geographic Information System (GIS) to map the location of viable landfill, regional filtering phase based on the regional policy and the elimination filtering using SNI 19-3241-1994.The results of the study showed that with an estimated population in 2033 which is 330 807 people, the amount of waste that will go to the landfill through the 3R principle reached 309.36 m3 / day or 61.87 tons / day so that the area of the required land for the sanitary landfill pattern with a 20 year planning is 17.70 Ha. The alternative location was selected by with a priority level which is located on the Panaragan Jaya Utama of Central Tulang Bawang sub-district with a land of 99.68 hectares, Tulang Bawang village districts Panaragan Central with a land area of 136.26 ha and the Kagungan Ratu village of Tulang Bawang sub-district of 74 , 65 Ha