KINERJA PEMBANGKIT LISTRIK DUAL-FUEL KAPASITAS 5 kW BERBASIS GASIFIKASI SEKAM PADI BERUNGGUN TETAP

EKUILIBIUM ◽  
2015 ◽  
Vol 14 (2) ◽  
Author(s):  
Sunu Herwi Pranolo
Keyword(s):  
Rice Husk ◽  
Flow Rate ◽  
Diesel Fuel ◽  
Air Flow ◽  
Specific Consumption ◽  
Gas Content ◽  
Dual Fuel ◽  
Producer Gas ◽  
Electrical Load ◽  
Air Flow Rate

<p>Abstract: Producer gas from rice husk gasification is the potential gaseous fuel for partially<br />substituting diesel fuel demand as it contains combustible gases (CO, H<br />2<br />). This<br />research examined the effects of air flow rate entering the diesel engine and electrical load on<br />diesel fuel consumption, electrical power of generator, and rice husk specific consumption in<br />gasifier. Gasification process took place in a downdraft air-blown gasifier with 10 cm throat<br />diameter. At rice husk consumption rate of 1 kg/hour and temperature of 827<br />C, the Specific<br />Gasification Rate (SGR) was 81.53 kg/(m<br />.hour) and the solid residue was 36% (w/w) of input<br />biomass. Total combustible gas content in producer gas was 21.6%. It was observed that diesel<br />fuel saving of 9.32% was obtained at air flow rate of 1.55 × 10<br />2<br />-3<br />m<br />/s and electrical load of 95%<br />from maximum generator power. Using producer gas at flow rate of 0.91 × 10<br />3<br />/s caused<br />generator de-rating of 8.33% at electrical load of 10%. Generating 1 kWh of electricity at air flow<br />rate of 2.99 × 10<br />-3<br />m<br />/s and electrical load of 95% required 1.85 kg of rice husk. A kilogram of<br />rice husk may substitute 0.26 L of diesel fuel at this air flow rate and load.<br />3<br />Keywords: rice husk; gasification; dual-fuel; specific consumption; de-rating<br />, and CH<br />4<br />o<br />-3<br />m<br />3</p>

scholarly journals A Analisa Kinerja Pembangkit Listrik Dual-Fuel Kapasitas 40 Kw Berbasis Gasifikasi Limbah Sabut Kelapa Di PT. Indonesia Power Pesanggaran Bali

Jurnal METTEK ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 26
Author(s):  
A.A Ngurah Wisnu Kusuma ◽  
I Gusti Bagus Wijaya Kusuma ◽  
A.A.I.A.S Komaladewi
Keyword(s):  
Flow Rate ◽  
Diesel Fuel ◽  
Power Plants ◽  
Gas Flow ◽  
Air Flow ◽  
Dual Fuel ◽  
Air Flow Rate ◽  
Coconut Fiber ◽  
Air Inlet ◽  
Fiber Consumption

Telah dilakukan penelitian tentang kinerja pembangkit listrik dual-fuel 40 kW berbahan bakar solar dan bahan bakar hasil gasifikasi dari limbah sabut kelapa. Penelitian ini bertujuan untuk mengetahui konfigurasi laju alir udara pembakaran (AFR) terhadap daya keluaran mesin diesel dan penghematan minyak solar yang dihasilkan. Pengukuran dilakukan dengan mengukur konsumsi bahan bakar solar, laju alir gas produser, daya genset, dan konsumsi sabut kelapa pada bukaan valve inlet udara pembakaran setengah dan penuh dengan pemberian beban listrik 0-100%. Data menunjukan bahwa konfigurasi laju alir udara pembakaran (AFR) yang baik digunakan adalah bukaan setengah dan kinerja mesin diesel dual-fuel menggunakan bahan bakar biomassa sabut kelapa mampu mengurangi konsumsi solar sebesar 41.4% Research on the performance of 40 kW dual-fuel power plants with diesel fuel and gasification fuel from coconut fiber waste. This study aims to determine the configuration of combustion air flow rate (AFR) on diesel engine output power and saving diesel fuel produced. Measurements were made by measuring diesel fuel consumption, producer gas flow rate, generator power, and coconut fiber consumption at the opening of the half and full combustion air inlet valve by providing 0-100% electric load. Data shows that the configuration of the combustion air flow rate (AFR) good to use is the half openings and the performance of dual-fuel diesel engines using coconut fiber biomass fuel can reduce diesel consumption by 41.4%

Evaluation of numerical modelling for a compact down-hole subsea gas-liquid separator for high gas content

2009 ◽  
Vol 49 (1) ◽  
pp. 433
Author(s):  
Shakil Ahmed ◽  
Mohamed Nabil Noui-Mehidi ◽  
Jamal Naser's ◽  
Gerardo Sanchez Soto ◽  
Edson Nakagawa
Keyword(s):  
Flow Rate ◽  
Gas Flow ◽  
Volume Fraction ◽  
Air Flow ◽  
Gas Content ◽  
Water Mixture ◽  
Air Flow Rate ◽  
Flow Rates ◽  
High Efficient ◽  
Liquid Separator

This paper describes the computational fluid dynamics (CFD) modelling of a laboratory scale gas-liquid separator designed for high gas content. The separator consists of two concentric pipes with swirl tube in the annular space between the pipes. The gas-liquid mixture comes tangentially from the side inlet and the system works with a combination of gravity and centrifugal forces to achieve a high-efficient gas-liquid separation. Three dimensional transient multi-phase fluid flows were solved to predict the velocity and volume fraction of each phase. The standard k- turbulence model was used for turbulence closure. The performance of the gas-liquid separator was visually established for a range of gas flow rates (271–495 L/min), with volume fraction (VF) =0.874–0.985 by observing the liquid carry over (LCO) regime where liquid was carried out in the gas stream. The liquid and gas flow rates at which the LCO was observed defines the upper operational range of the separator. Air-water mixture was used in the numerical simulations to keep consistent with the experiments. The pressure between the inlet and exit was validated against the experiments for different air-water flow rate combinations. The values were matched reasonably well for high air flow rate (495 L/min, VF=0.985) but were under-predicted for low air flow rate (271 L/min, VF=0.874). The air and water were mixed upstream of the inlet in the experiments and the pressure was measured at the start of the inlet. In case of numerical simulation the air and water were mixed at the inlet. This might cause the deviation of pressure when the air flow rate was low.

scholarly journals Model of thermal buoyancy in cavity-ventilated roof constructions

2021 ◽  
pp. 174425912098418
Author(s):  
Toivo Säwén ◽  
Martina Stockhaus ◽  
Carl-Eric Hagentoft ◽  
Nora Schjøth Bunkholt ◽  
Paula Wahlgren
Keyword(s):  
Analytical Model ◽  
Flow Rate ◽  
Numerical Study ◽  
Air Flow ◽  
Wind Pressure ◽  
Air Flow Rate ◽  
Test Set ◽  
Air Cavity ◽  
Thermal Buoyancy ◽  
The Impact

Timber roof constructions are commonly ventilated through an air cavity beneath the roof sheathing in order to remove heat and moisture from the construction. The driving forces for this ventilation are wind pressure and thermal buoyancy. The wind driven ventilation has been studied extensively, while models for predicting buoyant flow are less developed. In the present study, a novel analytical model is presented to predict the air flow caused by thermal buoyancy in a ventilated roof construction. The model provides means to calculate the cavity Rayleigh number for the roof construction, which is then correlated with the air flow rate. The model predictions are compared to the results of an experimental and a numerical study examining the effect of different cavity designs and inclinations on the air flow rate in a ventilated roof subjected to varying heat loads. Over 80 different test set-ups, the analytical model was found to replicate both experimental and numerical results within an acceptable margin. The effect of an increased total roof height, air cavity height and solar heat load for a given construction is an increased air flow rate through the air cavity. On average, the analytical model predicts a 3% higher air flow rate than found in the numerical study, and a 20% lower air flow rate than found in the experimental study, for comparable test set-ups. The model provided can be used to predict the air flow rate in cavities of varying design, and to quantify the impact of suggested roof design changes. The result can be used as a basis for estimating the moisture safety of a roof construction.

scholarly journals Modeling and optimization of radish root extract drying as peroxidase source using spouted bed dryer

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shahrbanoo Hamedi ◽  
M. Mehdi Afsahi ◽  
Ali Riahi-Madvar ◽  
Ali Mohebbi
Keyword(s):  
Kinetic Parameters ◽  
Flow Rate ◽  
Air Flow ◽  
Cost Effective ◽  
Industrial Applications ◽  
Interactive Effects ◽  
Root Extract ◽  
Air Flow Rate ◽  
Spouted Bed ◽  
Radish Root

AbstractThe main advantages of the dried enzymes are the lower cost of storage and longer time of preservation for industrial applications. In this study, the spouted bed dryer was utilized for drying the garden radish (Raphanus sativus L.) root extract as a cost-effective source of the peroxidase enzyme. The response surface methodology (RSM) was used to evaluate the individual and interactive effects of main parameters (the inlet air temperature (T) and the ratio of air flow rate to the minimum spouting air flow rate (Q)) on the residual enzyme activity (REA). The maximum REA of 38.7% was obtained at T = 50 °C and Q = 1.4. To investigate the drying effect on the catalytic activity, the optimum reaction conditions (pH and temperature), as well as kinetic parameters, were investigated for the fresh and dried enzyme extracts (FEE and DEE). The obtained results showed that the optimum pH of DEE was decreased by 12.3% compared to FEE, while the optimum temperature of DEE compared to FEE increased by a factor of 85.7%. Moreover, kinetic parameters, thermal-stability, and shelf life of the enzyme were considerably improved after drying by the spouted bed. Overall, the results confirmed that a spouted bed reactor can be used as a promising method for drying heat-sensitive materials such as peroxidase enzyme.

Method to Determine an Optimal Air-Flow Rate in Solar Collectors

1979 ◽  
Vol 3 (6) ◽  
pp. 357-362
Author(s):  
H. C. Hewitt ◽  
E. I. Griggs
Keyword(s):  
Flow Rate ◽  
Air Flow ◽  
Solar Collectors ◽  
Air Flow Rate

Model-Based Analysis of Transient Behavior of Large Scale CFB Boilers

2003 ◽  
Author(s):  
Ari Kettunen ◽  
Timo Hyppa¨nen ◽  
Ari-Pekka Kirkinen ◽  
Esa Maikkola
Keyword(s):  
Flow Rate ◽  
Large Scale ◽  
Air Flow ◽  
Model Parameters ◽  
Air Flow Rate ◽  
Process Data ◽  
Cfb Boiler ◽  
Flow Rates ◽  
Load Change ◽  
Secondary Air

The main objective of this study was to investigate the load change capability and effect of the individual control variables, such as fuel, primary air and secondary air flow rates, on the dynamics of large-scale CFB boilers. The dynamics of the CFB process were examined by dynamic process tests and by simulation studies. A multi-faceted set of transient process tests were performed at a commercial 235 MWe CFB unit. Fuel reactivity and interaction between gas flow rates, solid concentration profiles and heat transfer were studied by step changes of the following controllable variables: fuel feed rate, primary air flow rate, secondary air flow rate and primary to secondary air flow ratio. Load change performance was tested using two different types of tests: open and closed loop load changes. A tailored dynamic simulator for the CFB boiler was built and fine-tuned by determining the model parameters and by validating the models of each process component against measured process data of the transient test program. The know-how about the boiler dynamics obtained from the model analysis and the developed CFB simulator were utilized in designing the control systems of three new 262 MWe CFB units, which are now under construction. Further, the simulator was applied for the control system development and transient analysis of the supercritical OTU CFB boiler.

Sign in / Sign up

Export Citation Format

Share Document