bluuebunny/crossref_metadata_2025_split huggingface dataset:
Modelling of load variation effect on the steam power plant heat rate and performance using Gatecycle
Authors: Hasananto Nurdin , Darmadi Djarot B , Yuliati Lilis 
Published: March 2021

Abstract
One of the notable problems faced by power plant sector is the continuous increasing of policy urging air pollutant reductions such as NOX, SOX, and CO2. Therefore, there is a substantial necessity for power plant to conduct the most efficient scheme. One of the viable solutions is examining the present condition, evaluating as well as changing into better result. The present paper deals with the study of the powerplant performance running on fuels. In particular turbine maximum continuous rate (TMCR) were compared with other values. The outcomes show that heat rate, efficiency and fuel flow of the boiler increased respectively as a caused from the increasing load. In equipment level, heat transfer conducted by boiler is the biggest compared to another installed equipment. The result analysis highlighted that the design is able to be a replacement or insight for future operational data.
Development of IoT to regulate burning in FCC regenerators
Authors: Farhan Tanwir Ahmad , Siswnatara Ahmad Indra , Budiarso  , Widiawati Candra Damis , Robbani Abdullah , Hilman Gumelar Syafei M. , Pujowidodo Hariyotejo , Ramdlan Gunadi Gun Gun 
Published: March 2021

Abstract
Fluid catalytic cracking (FCC) is a conversion process used in petroleum refineries to convert high-fuel hydrocarbon fractions into other low FCC hydrocarbon fractions. Our research team is researching the FCC using palm oil so that it can become fuel. Regenerators are controlled and monitored by using the Internet of Things technology. The thermocouple sensor in the regenerator and stepper motor 28BY J-48 as an actuator on the ejector valve is controlled by Arduino Mega 2560 and ESP8266 for data reading and processing. The results of this study show that the design of IoT on the FCC regenerator uses Blynk applications have been running properly. The sensor and data actuator can be read by ESP8266 which is then sent to the Blynk server via the cellular network. This shows the ability of a data logger can used in the range’s internet wifi smartphone.
Design of 6S8P axial flux permanent magnet brushless DC motor with double-sided rotor
Authors: Utomo Satryo Budi , Irawan Januar Fery , Hadi Widyono , Sastiko BA 
Published: March 2021

Abstract
Electric motors developed rapidly in this decade. That is because electric motors have many advantages over conventional engines. The types of electric motors also vary, from low rated power to high rated power. Electric motors become an essential part of many sectors, such as industry and transportation. Brushless Direct Current Motor (BLDC) is one of the electric motors that has been developed because it has advantages compared to BDC motors. Low-power BLDC motors are widely used in several fields, such as computer construction, robots, and aviation. Research on the form of BLDC motor construction needs to be done to find out the maximum performance of a BLDC motor. Testing of a small motor axial flux permanent magnet brushless direct current with the double-sided rotor (AFPM BLDC DR) was carried out to determine the values of rotational speed, torque, mechanical power, and efficiency. Based on the test, a maximum rotational speed of 2365 rpm, the torque of 0.055 Nm, and the effectiveness of 70.34% are obtained.
The use of direct deposition electrospinning process in ZnO nanofiber fabrication as double layer (TiO2/ZnO) DSSC: variation of solution flow rate
Authors: Prasetyo Singgih Dwi , Hadi Syamsul , Arifin Zainal 
Published: March 2021

Abstract
The development of the use of Dye-sensitized solar cells (DSSC) types is increasingly studied. DSSC type solar cells are easy in fabrication and cheaper than silicon solar cells or thin layer type solar cells. DSSC engineering is manufactured by adding a semiconductor layer. Addition can be conducted by direct deposition of ZnO semiconductor layer on the TiO2 nanoparticle layer by electrospinning process so as to create a double layer DSSC photoanoda.The liquid electro-jet spun from ZnAc/PVA on FTO glass coated TiO2 nanoparticles semiconductor was captured by direct deposition method using an electrospinning machine. This study was to investigate the effect of direct deposition of ZnO layers using electrospinning with variations in the distance of the tip to the collector and the flow rate. The results showed that the use of ZnO layers made by direct deposition at a flow rate 3μl / min produces a small diameter and uniform morphology. Small and uniform morphology allows ZnO nanofibers to have color absorption to produce a better DSSC double layer photoanode efficiency.
The influence the applied of social restrictions large scale covid-19 the use of the motor vehicle and industry fuel oil consumption and the air quality in the Surabaya City
Authors: Muhaji  , Susila Wayan , Ansori Aris , Effendy Mohammad , Arizal Heru 
Published: March 2021

Abstract
Indonesia is a country in Southeast Asia with cases covid-19 most confirmation details cases 118.753 confirmation, 75.645 cured, treated 37.587 and 5.521 died August 6th 2020, while the provincial government in indonesia east java province is COVID-19 most cases. Any effort have been done to prevent risk transmission of, efforts to the latter is social restrictions large scale. The purpose of this research is to know how much the decrease in the use of the motor vehicle and industry fuel oil consumtion and the increase in the air quality in Surabaya city. This research includes the kind of research survey. Sample and population the research is PT Pertamina Marketing Operation Region V Surabaya Jl. Wonokromo 88 Surabaya and the Environmental office Surabaya city Jl. Jimerto No 25-27 Surabaya. The data in this research was obtained through, interview techniques observation and document study. The research results show that the decrease the average daily consumption of the motor vehicle fuel premium and pertamax series 24.92%. biodiesel and Dex series 27.54%. With air quality better this is apparent from the air of particles of a decrease in the concentration (PM 10) 39.71%, and gas levels SO2 20.45%, CO 17.35%, O3 23.38% and NO2 25.81%.
Optimization of manganese ferrite/distilled water parameter design on heat exchanger using RSM and CFD
Authors: Permanasari Avita Ayu , Affandi Muhammad Taufiq , Sukarni  , Puspitasari Poppy , Abdillah Mirza 
Published: March 2021

Abstract
Nanofluid is the new fluid in nanotechnology development. Its features carry the ability of fastly discharging heat transfer. Thus, it becomes beneficial for various applications, such as heat transfer, refrigeration, and some devices or machines. This study aims to investigate the performance of a response parameter in a heat exchanger with MnFe2O4 – H2O nanofluid as its cold fluid on various input parameters of tube number, cold fluid flow, and nanoparticle volume fraction to identify the optimum value of heat transfer rate. This study used Response Surface Methodology (RSM) that usually adopted to know the optimum value of a response from an influencing factor. Besides, it also used Computational Fluid Dynamics (CFD) to analyze the heat transfer on the fluid flow computationally. The results of this research show that the optimum parameter value of the heat transfer rate is 42.8022 Watt with 0.075% nanoparticle volume fraction, 0.6l/min nanofluid flow, and three heat exchanger tubes. The rate of heat transfer encounters an increase following the addition of MnFe2O4 nanoparticle volume fraction, cold fluid or nanofluid flow, and the number of heat exchanger tubes.
Nanofluid NiO-H2O on heat exchanger using Taguchi optimization and numerical simulation
Authors: Ramadhanty Nesy Cahya , Permanasari Avita Ayu , Puspitasari Poppy , Sukarni  , Choiron Moch Agus 
Published: March 2021

Abstract
Heat exchangers that use conventional fluids such as water, ethylene glycol, and oil, which are often used in industry, have poor heat transfer characteristics. Therefore, in this study, we employed nanofluids as a substitute for conventional fluids in a heat exchanger to improve the heat transfer characteristics. This study aims to determine the potential of the working fluid in the heat exchanger system with the addition of NiO nanofluids (sintering and unsintering), which are distributed into the water base fluid. The results were then processed using a simulation on a heat exchanger to determine the heat transfer characteristics, namely the log mean temperature difference (ΔTLMTD) using the Taguchi and CFD methods. This study used a water flow rate (discharge) of 0.45 litre min−1, 0.9 litre min−1 and 1.35 litre min−1, which is modeled in a simulation using variations of 1 tube, 2 tubes, and 3 tubes. Numerical simulations were carried out using the CFD method from Ansys 14.5 and the Taguchi optimization from Minitab 19. The experimental results showed that the best performance for ΔTLMTD was 1.35 litre min−1 using NiO-Sintering nanofluid with 1 tube.
Two-phase SPH for sloshing simulation in prismatic tank
Authors: Trimulyono Andi , Chrismianto Deddy , Samuel  , Iqbal Muhammad 
Published: March 2021

Abstract
The sloshing phenomenon is one challenging event in fluid-structure interaction especially for the liquid carrier such as a ship. Sloshing can endanger ships when there is energetic sloshing with volatile liquid inside the tank. One of the LNG carriers is membrane type which the tank is prismatic. The study aims to reproduce long-duration sloshing using a prismatic tank. The particle method so-called smoothed particle hydrodynamics is used to deal with long-duration sloshing. To accommodate of experiment condition a two-phase SPH is used. To accelerate SPH computation, a GPU solver is used in this study. The hydrostatic pressure from SPH is compared with an analytic solution and dynamics pressure is compared with experimental data to validate the results. The result shows SPH has good accuracy for hydrostatic pressure and dynamics pressure shows a similar trend to experiment with spurious pressure. Finally, free surface deformation has a tendency similar to experiment with void of air trapped in the water that can capture by SPH.
Goose foot water turbine performance with variation of fins quantity and turbine depth using computational fluid dynamics (CFD) approach
Authors: Wulandari Retno , Sihassaleh Pingkan , Ramadani  , Pribawanto Rofik , Habibie Abdurrahman Zaqi , Mauludi Muhammad Najib , Gemilang Yusuf Prasetyo , Al Fikkri Mochammad Fafa 
Published: March 2021

Abstract
Long-term electricity demand in Indonesia for the period 2003 to 2020 increased to 275 TWh. The demand for electricity in Java Island in the same period from 2003 to 2020 reached 200 TWh. Alternative and renewable energy is needed to support the electricity needs of the Indonesian. The potential for water energy is one of the alternative energies that can be maximized to obtain electrical energy, among others, it can be obtained from river water flow without falling heads or free water flow. A turbine innovation that can be used in rivers with free water flow is the goose foot water turbine. This research is focused on calculating the efficiency of the goose foot water turbine based on the variation of the number of fins and the depth of the turbine in order to obtain maximum performance. Performance analysis was conducted using the Computational Fluid Dynamics (CFD) method. The CFD results show that the highest value is obtained at the number of blades is 6, the number is fins 17, and the turbine depth is 0.35 m, namely the highest torque is 1593 Nm, the highest rotational speed is 11,705 rpm, the highest power is 1951.602 W, and the highest efficiency of 86.738%.
Study on the inlet air velocity on the refrigerated container; comparison between flat floor and T-bar floor
Authors: Budiyanto Muhammad Arif , Suheriyanto Nadhilah 
Published: March 2021

Abstract
The use of refrigerated containers plays an important role in perishable food transportation. The refrigerated container functions as a carrier that keeps the object’s temperature fresh and even below freezing point. The distribution of air flow in the container is very important to ensure in maintaining the setting temperature. The aim of this paper is to study the inlet air velocity on the refrigerated container by simulation model. The analysis was carried out by comparing two geometric models of the container floor in the empty load condition, namely the flat floor and the T-bar floor. From the simulation results, the average inlet velocity of the refrigerated container with the T-Bar floor has a higher velocity than the flat floor. In this case, the airflow circulation on the refrigerated container of the T-bar floor and flat flow around 525 m3 h−1 and 314 m3 h−1, respectively. From this case study, it is found that the use of T-bar floors can increase airflow circulation approximately 26%.
Study on the effectiveness of a stern-foil on a multi-chine hulls
Authors: Budiyanto Muhammad Arif , Wibowo Hadi Tresno , Naufal Fadhil , Obindias Rizqy 
Published: March 2021

Abstract
One of the keys to minimizing a ship’s resistance is the application of a stern foil, which lifts the hull above the water’s surface, producing higher efficiency compared with a planning hull. The aim of this paper was to investigate the application of a stern foil on multi-chine hulls through experimental methods. The experiment was carried out using 0.75-meter ship models. The application of the stern foil using an asymmetrical National Advisory Committee for Aeronautics (NACA) foil installed below the transom of a ship model and positioned parallel to the keel direction. The experiment was carried out with variations in the speed controls and hull loads. From the two variations of tested ship models showed the average ship-resistance reduction with application stern-foil on the multi-chine hulls is 41.2%, varies depending on speed and loading conditions.
Computational fluid dynamics heat transfer analysis of double pipe heat exchanger using nanofluid MnFe2O4 with ethylene glycol/water
Authors: Permanasari Avita Ayu , Rusli Muhammad Hilmi , Puspitasari Poppy , Sukarni Sukarni , Abdillah Mirza 
Published: March 2021

Abstract
The heat exchanger is an essential instrument in heat transfer. Various efforts have been carried out to improve heat transfer features. One of them is by adjusting the conventional cooling fluid using nanofluid. This study used MnFe2O4 nanoparticle along with fluid obtained from a mixture of ethylene glycol (EG) and water. This research aims to identify heat transfer characteristics of a double pipe heat exchanger with MnFe2O4-EG/Water nanofluid using the CFD simulation method. The EG/Water mixture variation was 20, 40, 60, and 80% with MnFe2O4 concentration of 0.05%. Besides, the nanofluid flow was also varied by 0.2; 0.4; and 0.6 l min−1. The research results show that MnFe2O4 nanofluid effects on heat transfer characteristics encounter an increase following the rise of MnFe2O4 nanoparticle addition and higher water flow. In contrast, the addition of ethylene glycol carries a dreadful effect on this research. The improvement of heat transfer characteristic is hugely influenced by the increased thermal conductivity along with the addition of MnFe2O4 nanoparticle.
Reducing non-productive time of mud pump with acoustic emission monitoring techniques on fluid end parts
Authors: Hilmawan Hilman , Basri Hasan 
Published: March 2021

Abstract
This research conducted for overcoming the high non-productive time (NPT) damage of fluid end part mud pump in the drilling of PT. Pertamina PDSI Drilling Rig # 42.2/N1500-E Well SWI-001 at Pali, South Sumatra, Indonesia. The purpose of this study is to provide a solution for detecting early worn out of fluid end part with the innovation of the electric audio module (EAM), which is suitable for conditions in the field. This EAM works using the method of detecting acoustic emission signals from piezoelectric sensors that arise due to the movement of the drilling fluid and fluid end part in the mud pump module body. Then the emitted pulse is forwarded to the EAM, and the results give through two outputs, namely the spectrogram graphic and the acoustic emission sound that enlarged through headphones. The results of this EAM innovation can reduce the NPT in PDSI Rig # 42.3/N1500-E from 34.5 hours to 0 hours, and monitoring can be done remotely up to more than 50 meters no longer on the spot. The application of EAM in drilling rig implies a modification in the maintenance of a mud pump from breakdown to predictive maintenance. It supports the safety aspect considering monitoring which can perform remotely.
An experimental investigation of sea water distillation using flat absorber plate and fin absorber plate with PCM storage
Authors: Azis Ismayati Sutina , Himran Syukri , Jalaluddin  , Anis Ilahi Rahmadhani M. 
Published: March 2021

Abstract
The presented study investigates the experiment of the thermal performance of sea water solar distillation system using flat absorber plate and fin absorber plate with phase change material (PCM) storage. The two distillation systems operated simultaneously under the same conditions to study its thermal performances. The experimental investigation shows that the distillation using fin absorber plate with PCM storage achieves better thermal performance than that of using flat absorber plate. The daily water productivity of the distillation using fin absorber plate with PCM is 262.75 mL m−2 in average and the other one is 142.85 mL m−2 in average. The average daily efficiency increases of 48.5 % of the distillation using fin absorber plate with PCM storage compared with the distillation using flat absorber plate. Using absorber plate with fin and PCM storage in the distillation system contributes to increase the thermal performance of the system.
The effect of using jackfruit seed adhesives on the characteristics of corncob waste briquettes
Authors: Ghofur Abdul , Tamjidillah Mastiadi , Subagyo Rachmat , Irawansyah Herry , Hasan Ibrahim 
Published: March 2021

Abstract
To utilize it to be a useful fuel, corncob waste must be processed first, one of which is processed into briquettes. the use of jackfruit seed flour makes the water content and ash content of briquettes lower than using tapioca flour. The heating value of briquettes using jackfruit seed flour is also higher than using tapioca flour. This study aims to determine the effect of using jackfruit Seed adhesive on the characteristics of corncobs waste briquettes which include water content, ash content, volatile matter levels, and heat value. Knowing the characteristics of the best corncobs waste briquettes based on SNI standards. Corn cobs are first converted into charcoal by carbonization process after which the charcoal is mixed with an adhesive derived from jackfruit seed flour. Methods In this study, a mixture of corncob charcoal and jackfruit seed flour was 90%: 10%, 85%: 15%, and 80%: 20%. Then the mixture of charcoal and flour is printed with pressure variations of 100 kg cm−2, and 120 kg cm−2. Briquette characteristic parameters based on SNI 01-6235-2000 are water content, ash content, volatile matter content, and heating value. The results showed that the briquettes with the best characteristics were when variations in the composition of charcoal and jackfruit seed flour were 90%: 10%. The briquette has a characteristic water content of 7.01%, an ash content of 6.88%, volatile matter content of 17.89%, and a calorific value of 6241.81 cal g−1. Overall, the briquette still does not meet the SNI 01-6235-2000 standard because the briquette’s volatile matter level exceeds the specified maximum limit of 15%.
Determining firefly ideal parameter for tuning Kp, Ki, And Kd parameter in photovoltaic application
Authors: Ali Machrus , Nurohmah Hidayatul , Budiman  , Suyono Hadi , Muslim Muhammad Aziz , Safarudin Yanuar Mahfudz , Firdaus Aji Akbar 
Published: March 2021

Abstract
The Firefly Algorithm (FA) method is presented inspired by the social behavior of fireflies and the phenomenon of bioluminescent communication. There are three FA parameters used in the program, beta is used to determine firefly speed, alpha is used for flexibility of movement, and gamma is used for more complex constraints or problems. In this dual axis photovoltaic tracking study using the beta value determination. By changing the Bêta value from 0.1 to 0.9. From the results of 10 models, it was found that the PID constant values were varied. On the horizontal axis, the best results if the beta is given at 0.4 and the worst result if the beta is given at 0.8. On the vertical axis, the best results if the beta is given at 0.3 and the worst result if the beta is given at 0.8.
Assessment of combustion behaviour of carbonize bio-briquette wood residue under different pressure and particle size
Authors: Amrullah Apip , Syarif Akhmad , Fauzianur Ahmad 
Published: March 2021

Abstract
The effect of particle size distribution and compaction pressure of wood residues briquette was investigated. Starch was used as a binder. Concerning that the wood residues have valuable content namely lignin and cellulose, the wood have a high possibility to be modified as a biofuel. In this study, the wood residues (iron and gelam woods) were treated by drying, milling, and carbonization at 500 °C. The ratio between carbonize wood and binders was 20% of the weight. The briquette was manufactured at room temperature with different compaction pressure (10, 12, and 15 MPa) and particle size (40, 50, and 60 µm). The results revealed that the carbonize wood and the inorganic binder performed a good combination. The characteristics of wood residue briquette (WRB) during the first 50 min were higher burning temperature (180°C) for the 60 µm of particle size and 15 MPa of compaction pressure. The lowest water absorption value was 0.25% for the compacted at 15 MPa. Burning rate decreased follows the briquette compaction pressure (3.1 to 2.3 g min−1).
Optimizing production of biodiesel from Nyamplung oil with microwave power setting
Authors: Kurniati Sri , Nursalim  , Galla Wellem F. , Syam Sudirman 
Published: March 2021

Abstract
This experimental study examined the processing of biodiesel from Nyamplung oil by microwave power regulation. The aim is to optimize biodiesel yields based on the time process and heating temperature of 650 °C. A suitable method for analyzing biodiesel results is to set the 400 Watts microwave power to 10%, 30%, and 50% of the maximum power. In this process a 1% w/w KOH catalyst is used with a variety of molar ratios of oil-methanol such as 1:6, 1:9, and 1:12. The results showed that the 1:6 molar ratio is the highest percentage of biodiesel obtained with a variation of power of 10% or equal to 40W. The fastest time in this process is 10 minutes. In contrast, the 1:12 molar ratio is the lowest obtained percentage of biodiversity. The higher the temperature and the molar ratio used the fewer biodiesel products are obtained.