Hariyotejo Pujowidodo

Hariyotejo Pujowidodo
Badan Pengkajian dan Penerapan Teknologi | BPPT · TIRBR

About

27
Publications
7,722
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38
Citations
Citations since 2017
20 Research Items
38 Citations
20172018201920202021202220230246810
20172018201920202021202220230246810
20172018201920202021202220230246810
20172018201920202021202220230246810

Publications

Publications (27)
Article
This research aims to find the optimal standard k-e turbulence model constants (cµ, c1e, and c2e) for better predicting compressible fluid dynamics in an air jet ejector. The turbulence field in a jet flow plays an important role in influencing the performance of the momentum transfer process at a shear layer in nozzle application for momentum sour...
Article
Full-text available
The purpose of the study is to investigate the effects of various air flow rate or superficial gas velocity in term of excess air to obtain the optimum distribution of solid phase in the Circulating Fluidized Bed (CFB). The Computational Fluid Dynamics (CFD) method used for simulations uses the Multi-fluid Eulerian approaches incorporating the Kine...
Article
Full-text available
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 thermoc...
Article
Full-text available
The multiphase gas-solid in the FCC Riser system is a complex flow. The particle flow influenced by superficial velocity. Some researchers showed that it needs a method to solve the advanced analysis in solid-particle characteristics, for example, Reynold number particle, the difference of height fluidization, coefficient of drag, and particle forc...
Article
Full-text available
Fluid Catalytic Cracking (FCC] is playing a big role in oil refinery industries and it has been used for producing most of the fuel around the world. FCC has also a great potential for producing biofuel derived from palm-based bio oil. However, it takes a complex calculation to design the overall FCC system. This paper offers the design simplificat...
Article
Full-text available
The heat exchanger is the most common equipment in the industry. Nowadays, CFD simulation has been used widely to predict the performance of heat transfer. The accuracy of the CFD depends on several factors such as simulation parameters, models, and quality of the grid. The heat exchanger in industrial application has big heat transfer capacity, si...
Article
Full-text available
The analysis of the turbulence model on turbulent flow in certain objects is important to optimize the numerical simulation. To simulate rotating flow in crossflow turbine, the numerical accuracy of the Renormalization Group (RNG) k-ε model has better results than the standard k-ε model. To improve predictions of the standard k-ε turbulent model ca...
Article
Full-text available
The objective of this study is to analyze turbulent flow characteristics of turbulence modeling in Steam Curved Converging Diverging Nozzle. The three turbulence models have been conducted to simulate flow characteristics using k-ε standard, k-ε Renormalization Group (RNG), and Reynolds Stress Model (RSM). Fluid dynamics parameters such as pressure...
Conference Paper
This work studies the effect of kinetic Prandtl value in the k-ε turbulence model transport equation on the characteristics of fluidized bed fluid flow. The research was conducted using CFD simulation method. Three kinetic Prandtl values were chosen, namely 0.8; 0.9 and 1.1; plus 1 from the default value of the turbulent model. The parameters obser...
Conference Paper
The performance of heat transfer in gas-solid fluidization flow is influenced by operational factors, such as gas velocity and temperature. CFD simulation method and Factorial Design of Experiment had been used to investigate in an inferential way, to determine the most significant factor that affects the heat transfer. This research had been condu...
Conference Paper
A numerical simulation, using the Cartesian and Body Fitted Coordinate (BFC) structured mesh, has been conducted to investigate fluid dynamics inside the asymmetric supersonic Converging-Diverging (CD) nozzle. Two models of nozzle mesh generation namely stepped curvature and curved were simulated to obtain the flow parameters and turbulence propert...
Article
Full-text available
This paper presents a numerical study of a small-scale cyclone separator performance by means of computational fluid dynamics (CFD). The family of Euler-Lagrange approach named multiphase particle-in-cell (MP-PIC) is employed for modelling gas-solid interaction. The three-dimensional small-scale cyclone separator geometry was discretized with hexah...
Conference Paper
This paper presents the numerical analysis of fluid flow in a two-dimensional fluidized bed through simulations. The experiment data of Geldart B particles fluidized bed is used to validate the simulation results. Simulations has been conducted using Computational Fluids Dynamics (CFD) method, Eulerian Eulerian two fluid approach with Gidaspow drag...
Conference Paper
The CFD method, as the initial analysis has more benefits regarding experiments, including saving time and costs. Variable of flow parameters and geometry can be developed easily to get the desired results. However, research is needed to improve the accuracy of the results and the efficiency of the calculation process. The study of complex turbulen...
Conference Paper
The study of steam mass flow in a Curved Converging Diverging Nozzle has been analyzed using analytic and CFD modeling. The objective of this work is to get the comparison between the results of flow properties and characteristics from solution using thermodynamics analysis and turbulent model simulation. Using the post analysis of CFD simulation b...
Article
Full-text available
Nozzle is the one important component in a power cycle plant that transfers heat enthalpy to kinetic energy for rotating power turbine. The biomass has specific characteristics heating value comparing to conventional fuel, and it is one of the renewable energy. The flow characteristics flow trough cross area nozzle plays important role that absorbs...
Conference Paper
Full-text available
As an initial analysis, numerical simulation has more advantages in saving time and costs compared with experiments. Variations in flow conditions and geometry can be adjusted easily to get results. CFD methods with k-ε model, RNG k-ε model and Reynolds Stress Model (RSM) widely used in research on objects and different conditions, to be produced o...
Conference Paper
This paper presents the integration of mathematical and Computational Fluid Dynamics (CFD) modeling analysis of the excess air in a Circulating Fluidized Bed (CFB) Boiler steam power plant. The purpose of this study is to analyze the impact of excess air on plant performance and operation, using Engineering Equation Solver (EES™) and CFD tools. Pow...
Article
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This paper presents the mathematical modeling analysis on cooling system in a combined cycle power plant. The objective of this study is to get the impact of cooling water upsurge on plant performance and operation, using Engineering Equation Solver (EES™) tools. Power plant installed with total power capacity of block#1 is 505.95 MWe and block#2 i...
Article
Full-text available
As an initial analysis, numerical simulation has more advantages in saving time and costs regarding experiments. For example, variations in flow conditions and geometry can be adjusted easily to obtain results. Computational fluid dynamics (CFD) methods, such as the k-ε model, renormalization group (RNG) k-ε model and reynolds stress model (RSM), a...
Conference Paper
Full-text available
Untuk melaksanakan Program Revitalisasi Industri Pupuk dalam Inpres No. 02 tahun 2010, telah dibangun plant utilitas Boiler Batubara berkapasitas 2x250 ton per jam uap, di sebuah pabrik pupuk nasional yang terletak di daerah Kalimantan Timur. Plant tersebut merupakan unit pendukung penyediaan kebutuhan uap plant pembangkit daya dan proses produksi...
Research
SRF fertilizer plant capacity of 10,000 tonnes / year located in Bantaeng, is a pilot plant for the agricultural sector in Indonesia. Dryer system comprises three rotary dryer (RD). RD I and II serves as a dryer while RD III as a conditioning product to atmospheric conditions. The system is designed to reduce the water content of 8.18% to 1.87%. Si...
Conference Paper
Full-text available
Unit Utilitas memiliki peran penting dalam menyediakan kebutuhan energi panas, listrik dan fluida kerja di dalam proses pengolahan minyak bumi, di mana terdapat peluang peningkatan efisiensi energi terbesar, sebanyak 30%, di antara sektor peralatan kolom fraksinasi, proses, penukar kalor, motor dan lainnya. Tulisan ini memuat hasil kegiatan evaluas...
Conference Paper
Full-text available
Untuk mengoptimasi proses produksi baja kawat gulungan (Wire Rod Mill) di industri baja konvensional, dalam proses pemanasan ulang (Reheating) terdapat peluang pemanfaatan Teknologi Sistem Hot Charging. Bahan baku baja batangan (Billet) harus dapat dijaga temperaturnya 5secara optimum terutama saat ditransportasikan dari Billet Steel Plant (BSP)....

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