bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optimal sizing and sensitivity analysis of Hybrid Renewable Energy Systems: A case of Ur island in Indonesia
Authors: Aditya I A , Aisyah S , Simaremare A A 
Published: March 2021

Abstract
This study presents the design optimization and sensitivity analysis of the hybrid renewable energy system (HRES) for Ur island in Indonesia. The Ur Island is a remote island where local residents unreachable by electrical network systems but has potential to utilize the solar Photovoltaic (PV) and wind energy. The analysis of the hybrid systems is modeling in the Hybrid Optimization Model for Electric Renewable (HOMER) to find out the most cost-effective configurations for electricity requirement of 234 kWh/day primary load with 25.6 kW peak load. The results show that system with the configuration of PV-Wind-Diesel-battery delivers the best optimal design for Ur island in terms of cost of energy (COE) and Total Net Present Cost (TNPC). In addition, the impact of solar radiation, wind speed, diesel price, O&M cost, investment cost and replacement cost are identified by carrying out the sensitivity analysis.
Analysis of unbalanced voltage due to varying amounts penetration of rooftop PV in distribution network with balanced load
Authors: Jintaka D R , Priambodo N W , Harsono B B S D A , Hartono J 
Published: March 2021

Abstract
The increased penetration of rooftop PV on distribution networks is triggered by the decreasing prices of solar panels which will get closer to reach the grid parity. However, the massive rooftop PV without storage at medium and low voltages will cause power quality problems, namely increased of voltage fluctuations, unbalanced voltages and harmonics, as well as the emergence of active load fluctuations and power factors on the nearest bus. This paper analyzes the increase in unbalanced voltages in the distribution network due to the massive rooftop PV without storage. In a balanced load configuration, the presence of rooftop PV in certain phases with varying amounts penetration will cause voltage imbalances in the distribution network. From the results of this simulation, it can be concluded that with a higher number of rooftop PVs, the spread of rooftop PVs on a higher number of phases results in a smaller voltage imbalance than if the rooftop PV is only concentrated in one particular phase. Then, longer network lengths provide greater imbalance compared to networks with shorter distances.
Design of a prime mover turbine propeller open flume micro-hydro electric power plant 1 kW
Authors: Suryadi A , Eriyadi M , Usman D , Hamdani Y M , Abadi S C 
Published: March 2021

Abstract
West Java has many rivers that have high falls and varied water discharges where utilization is not optimal. The study aims to utilize water energy to be able to produce a Micro Hydroelectric energy generator. The design of this PLTMH starts from measuring the potential of water, designing turbines and generators, then observing the work system of PLTMH and estimating the electric power that will be generated by the PLTMH. From chosen location, it is known that the water flow is 0.0059 cubic per second and has a waterfall height of 4 meter. This data is used to select the type of turbine, selection of reservoirs, rapid piping, and generator design. The results obtained by the design of Micro Hydro Power Plant (PLTMH) using open flume propeller turbines and 3-phase generators are changed to 1 phase. Open flume propeller turbines have a simple construction and can be operated at a waterfall height of 3-6 meters and low water discharge so that the use of open flume turbines for micro-hydro power plants will be used in river flows that have high waterfall and water discharge the low one is very appropriate. With a turbine rotation speed of 2,063 rpm, this PLTMH is capable of producing 1,346 watt turbine power with a 45 liter per second water flow so that the power obtained is 1,076 watt.
Performance evaluation of 5 MW Solar PV Power Plant in Kupang
Authors: Nugroho W A , Sudiarto B 
Published: March 2021

Abstract
Government of Indonesia have target to achieve 23% share of renewable energy in National energy mix by 2025. As a part of the target, solar energy needs to contribute as much as 6.5 GW installed capacity in 2025. Therefore, Government of Indonesia develop policy to promote renewable energy, especially solar energy. In 2013, Ministry of Energy and Mineral Resources launched High Tariff Regulation for Solar PV Power Plant. The 5 MW Kupang Solar PV Power Plant is one of the result of the policy. It was the biggest Solar PV Power Plant project in Indonesia. This project located in Oelpuah District, Kupang Regent, in East Nusa Tenggara. This Solar PV Power Plant consist of 2,208 units of 230 Wp solar PV module manufactured by state owned company namely PT. LEN Industry and 250 units of grid inverter manufactured by SMA. Started operation in March 2016, this Solar PV Power Plant already contribute in national renewable energy share. By using the recorded data, evaluation of power plant performance conduct by using Performance Ratio calculation. During March 2016 to December 2019, the Plant have produced 25.3 GWh of electricity. Based on IEC 61724 methodology, daily Performance Ratio is between 0.7 and 0.9. In additionally, economic analysis of this Plant was calculated based on realization of project income. It shows that the investment will be returned by 8th year of the Plant operation.
Alteration from radial to ring power distribution to improve system reliability: A case study
Authors: Winandi H , Sudiarto B 
Published: March 2021

Abstract
Outage of power system supplying oil and gas production facilities causes hundreds of barrel of oil equivalent loss per hour. Hence, there is a need to improve the supply continuity by e.g. altering the power distribution configuration from radial to ring. However, switching to ring configuration demands adjustment related to system capability in delivering higher current, taking longer route, or handling higher fault current. This study develops an approach to assess those requirements and benefits. The evaluation includes load flow, short circuit, protection relay coordination, and reliability analysis. This study aims to evaluate the existing system capability in applying ring configuration and recommend any required adjustment. This study also intends to estimate the reduction of outage duration. Overall, the existing radial power distribution system can be switched to ring configuration with several adjustments. The ring application offers 43.07 percent annual outage reduction from 17.322 to 9.861 hours annually.
Intelligent control system for high efficiency Electric Vehicles
Authors: Rif’an M , Media’s E , Firmansyah H 
Published: March 2021

Abstract
Brush-less Direct Current (BLDC) motor drive systems are widely used in electric vehicles (EV). However, most EV control strategies only focus on BLDC motors without considering changes in different driving conditions. This paper proposes an intelligent control strategy based on an intelligent neural network that can change control parameters based on changing driving conditions. This system has the ability to self-learning and adapt based on driving conditions. The simulation is carried out using the Electric Vehicle Drive Train model and run on the MATLAB-SIMULINK platform. The simulation results show that the smart control strategy designed shows very good efficiency with minimal errors and quickly adapts to different driving conditions.
Technical and financial analysis of a mini-hydro power plant 2x500 kW Bandung Regency, Indonesia
Authors: Prabowo H , Sudiarto B 
Published: March 2021

Abstract
The new regulation of Indonesia Energy and Mineral Resource Minister PERMEN ESDM 50, 2017 changed the tariff of mini-hydro power plant in the Bandung Regency from Rp. 1,200/kWh to Rp.850/kWh. Although the tariff change, the regulation is going to be build owned after 20 years. It needs investment recalculation according to the new tariff. The technical studies show the potential electrical energy and the turbine’s type. The financial analysis provided the feasibility of the project used IRR, NPV, and Payback period method. The variable used is the EPC cost of some turbine brands and civil work. This paper informed that the project is feasible for investment and construction. The results of the calculation are IRR 9,69%, NPV RP. 8.373.579.334 and the Payback period 7 years and 9 months.
Design and implementation smart parking based-on Visible Light Communication
Authors: Hartaman A , Darlis D , Rabani I , Gilang M 
Published: March 2021

Abstract
In general, the parking doorstop system used in Indonesia, still using a cable or bluetooth to connection to a button or switch for open and close the parking doorstop. To record the identity of the vehicle still using manual paper, and to enter and leave the vehicle still using the operator. This results in a quite solid vehicle queue. The parking system above is not reliable for a faster parking system. So this research will utilize Visible Light Communication technology by utilizing the characteristics of several photodiode sensors and lighting to send and receive text data from Visible Light Communication (VLC). In this parking system will utilize vehicle lights in the form of Light Emitting Diode (LED) lights, and use Pulse Width Modulation (PWM) communication from the sender with a frequency of 490 hz with time efficient. In this research, vehicle that will be used is a motorcycle. The results of the study for receiving and sending data using PWM modulation which can still be read and received correctly are at a distance of 220cm during the day with a value of 245 and 290cm lux at night with a value of 163 lux. receipt of data from the sender that is equal to 0.28 seconds. In this study the data transmission angle was changed and obtained the recipient response value at vulnerable distances of 50 to 90cm with effective data that is at an angle of 5 degrees.
Development of learning media patisserie based on hybrid learning
Authors: Rahmawati Y , Yogha S , Maosul A 
Published: March 2021

Abstract
Utilization of the internet in patisseries learning is not optimal yet, the use of media in learning is not entirely interesting and varied, task collection and evaluation of learning outcomes are still print-based, one of the difficulties associated with technical issues is understanding the material and collecting assignments. These three factors are the background of the learning management system in the implementation of hybrid learning based patisseries. Learning Management System is one way to develop online learning or e-learning, which is a web-based learning management application that facilitates learners to learn as they should in a virtual classroom. The Learning Management System used in this study is a Web-based Learning Management System that is available at https://spot.upi.edu/. The design of the Learning Management System model in Patisserie learning is useful to assist in the teaching and learning process. Learning programs based on the use of internet technology (online) that can be done without the limitation of space and time ‘any time anywhere’. This Learning Management System application model, made based on the web, with the aim to enable lecturers and students who become the user model of this application, to access learning plans and learning material through the internet wherever they are. Supporting facilities in the form of network and network server at UPI have reached 800 Mbps, then from the SPOT process aspects using licensed software namely Microsoft Office and hardware +-970 with the core 2 processor, P4 flat slim monitor. In addition to accessing learning material, this learning management system helps users to be able to discuss topics by on-line using the forum provided. This study aims to develop a hybrid learning based learning management system for the readiness of students’ competency test.
Design of earthquake early warning system based OMRON D7S vibrate sensor
Authors: Fajri A H , Murti M A , Priramadhi R A 
Published: March 2021

Abstract
Indonesia is a country that is very prone to earthquake. This disaster can have a very large impact from main destruction of ground motion and secondary destruction from building rupture. By providing early warning system, secondary disasters caused by the earthquake, such as fire due to gas leakage, electric shock or loss of important personal data, can be prevented. This research designs an early warning system against earthquakes, where the sensor used was 3d accelerometer-based OMRON D7S vibration sensor. A warning is also sent to personnel or web-server via GSM communication. The system calibrated with a standard tool MEISEI G401 owned by Indonesian Earthquake Agency (BMKG). Test showed that early warning system have accuracy value of 74.32%. From the testing that has been done, the time delay in sending data is greatly influenced by the state of the surrounding environment. Data is sent and stored to an SQL-based database, with an average delivery delay of 1.7 seconds. This system successfully provides an early warning using the buzzer alarm as desired. The percentage of success of the buzzer turns on as desired is 100%.
Chitosan as a feed additive: Its modulatory effect on methane emission and biohydrogenation under artificial rumen system
Authors: Jayanegara A , Harahap R P , Suharti S , Nahrowi N 
Published: March 2021

Abstract
This study aimed to determine the effects of chitosan addition on methane emission, fatty acid biohydrogenation and fermentation profile of rumen simulation technique (rusitec). Four studies reported chitosan use as a feed additive in the rusitec system were integrated into a database. Treatments were categorized into control (no chitosan addition) and chitosan addition at different levels. Various studies were treated as random effects whereas treatments were considered as fixed effects. Data were analyzed by using mixed model methodology. Significance was declared when P<0.05 and tendency was stated when P<0.1. Results showed that chitosan addition reduced methane emission in comparison to control by as much as 28% (P<0.05). Total volatile fatty acid concentration was not altered due to chitosan, but acetate proportion was decreased (P<0.05) while propionate proportion tended to elevate in the addition of chitosan (P<0.1). Chitosan did not influence ruminal pH, ammonia concentration and nutrient digestibility (organic matter, crude protein and neutral detergent fiber) of substrate. Proportions of vaccenic acid (P<0.01) and conjugated linoleic acid (P<0.001) were increased by the addition of chitosan. In conclusion, chitosan may provide beneficial effects in the rumen by mitigating methane emission and elevating fatty acids contributing to human health.
The efficiency of municipal solid waste management by transforming the collection and transport systems on Wangi-Wangi Island, District of Wakatobi
Authors: Wahyuni I R , Supriatna A M , Wijayanti P 
Published: March 2021

Abstract
Wakatobi is the center of the world’s coral triangle with its rich marine biodiversity. Aside from being a conservation area, Wakatobi is also a tourist destination that is demanded to be able to maintain the quality of its environment. One of its challenges is solid waste management. Wangi-Wangi Island is an urban area of Wakatobi that requires attention in solid waste management. Nowadays, the handling of solid waste in this area only covers 54%. Waste collection and transportation systems have not been through good planning. In addition, the limited facilities and the lack of operational costs are the causes of low coverage handling services. This study aims to analyze the system of collecting and transporting to make solid waste management efficient on Wangi-Wangi Island. The research methodology was conducted by surveying the existing patterns, analyzing the system by transforming the collection pattern and selecting the best transportation route using GIS. The results showed that by changing the pattern of transportation of solid waste from direct to indirect and choosing the best route with the fastest travel time. Solid waste management coverage can be increased by 80% by reducing transportation costs from 46,596 to 31,475 rupiah / ton or savings up to 30%.
The effect of hydroponics systems on the growth of lettuce
Authors: Frasetya B , Harisman K , Ramdaniah N A H 
Published: March 2021

Abstract
Shifting patterns of consumption in urban communities to consume pesticide-free and clean vegetables encourage the development of hydroponic cultivation in urban areas. In hydroponic lettuce cultivation, resource efficiency in the production stage is vital to be implemented so that the profits of hydroponic farmer increase. This study aims to provide recommendations for a more efficient hydroponic system to increase the growth of lettuce plants. The research method used in this study was a complete randomized design consisting of five treatments that were replicated five times. The treatment consists of five types of hydroponic installation systems, namely: A = Nutrient Film Technique System (NFT), B = Deep Film Technique System (DFT), C = EBB and FLOW Systems (EFS), D = Aeroponic Systems (AS), and E = Floating Raft System (RFS). The parameters observed to measure the effectiveness of each system in increasing the growth of lettuce plants are plant height, leaf number, fresh weight, and shoot-root ratio. The observational data were then analyzed using analysis of variance at 5% significance level and Duncan’s test at 5% level. The results showed that the NFT hydroponic system of lettuce plants was 6%-10% more efficient compared to the floating raft system and DFT system in increasing yields.
Recommended plants for green open space to enrich bird diversity in Gedebage region Bandung West Java
Authors: Yuliawati A , Pramadi R A , Zuldin M , Yusuf D K , Jamaludin A N , Patoni U 
Published: March 2021

Abstract
Gedebage is projected to be the center of Bandung city government. A good urban plan must have at least thirty percent green open space in that area. Therefore, it is necessary to plant more trees on the Gedebage to increase green open space. To enrich bird diversity, the type of plants that planted on green open space must have added value as bird habitat. The aim of this study is to obtain a list of plants used by birds that are suitable and can grow well in the Gedebage. The method used was direct observation with line transect method to record plants species that used by birds in Bandung city park. Then the growth requirement of recorded plants was studied based on literature. This study shows only 21 species of 33 plants species that used by bird are suitable growing in Gedebage. Based on this research, we recommend 21 species of plants that are suitable to be planted in Gedebage that can increased number of green open space and also attract birds so that the diversity of birds in Gedebage can be increased. The results of this study can also be applied in areas with similar physical conditions to Gedebage.
Application of various source animal manure and dosage on the growth and yield Phaseolus vulgaris L.
Authors: Taofik A , Frasetya B , Kusmana A 
Published: March 2021

Abstract
Animal dung in Indonesia has many types; each type of manure gives different plant growth response. This study aims to determine the type of manure and its adequate dosage to increase the growth of bean plants. The research has been carried out in the experimental field of Universitas Padjadjaran, Jatinangor, Sumedang-West Java with altitude 753 m above sea level (asl). The study used a factorial randomized block design. The first factor is the type of manure (k1 = cow manure, k2 = sheep manure, k3 = chicken manure, and k4 = rabbit manure) and the second factor is the dose (d1 = 10 t ha−1, d2 = 20 t ha−1, and d3 = 30 t ha−1). Each unit was repeated three times. The growth parameters observed were plant height, dry plant weight, number of pods, and pod weight per plant. The data from observations were then analyzed using analysis of variance at 5% significance level and then followed by Duncan’s test at 5% significance level. The results showed the application of chicken manure 20 t ha-1 gives better growth results than other manure, but the type of manure at various dosage levels has not been able to increase the weight of pods per plant.
Relationship between distribution of phytoplankton with Cimanuk river water quality
Authors: Mulyani L S , Mardiani R , Ardiana C , Nurkamilah S 
Published: March 2021

Abstract
Plankton is the primary food source for aquatic animals so that these herbs have an important role for the aquatic ecosystem. Research conducted in April 2019 at Cimanuk River, Garut, West Java. Water quality is strongly influenced by the activity of sand mining, industrial waste, agricultural, and household waste so that quality is reduced. Water quality can be determined through the study of biological analysis with the use of bioindicators. Bio-indicators used is the aquatic biota phytoplankton. This research uses descriptive research with correlation method. The goal is to determine the relationship between the distribution of phytoplankton with the quality of its waters. From the results of the research produced distribution of phytoplankton that consist of: The abundance of phytoplankton (1,077-a trough hit-1710 individuals/l), the index of diversity (2,6014-2,9184), the index of evenness (0,8651-0,8797), and index of dominance (0,8912-0.9255 level). Based on the person correlation showed that the relationship between water quality (light intensity, brightness, current speed, wind speed) with the distribution of phytoplankton.
Utilization of solar power for support facilities in the evacuation area during natural disaster
Authors: Atamtajani A S M , Ramadhan J , Adiluhung H , Yudiarti D 
Published: March 2021

Abstract
Products with the use of solar power in evacuation activities and displacement of natural disasters are very rarely found. Solar cell products are usually used by people on a certain scale, for example in accessories or lifestyle products. However, technology using solar panels is less developed, especially in products whose orientation is for natural disasters. Many cases were found during the evacuation of natural disasters, including many constraints Electricity is often a problem in areas where refugees are displaced after natural disasters. The problem of wasteful diesel generator energy resulted in the absence of an effective source of electricity and lighting, besides that information or distribution of the area was still fairly slow due to the portable speaker system and even door-to-door announcements. The method used is by combining aspects of technology into a conventional product by providing features needed in the event of a disaster. The method approach using the X-Problem method consists of immersion, convergence, divergence, and product adaptation designed with an effective and efficient function focus approach. From these problems, an emergency lighting product and emergency wireless loudspeaker can be designed to be provided in each of the evacuation tents. It is expected that the design of the product designed has a very important role in the evacuation process that occurs in the disaster environment, especially in Indonesia. The role of the product in creating an evacuation environment situation is more conducive.