eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
964
969
72538
Attitude Estimation of Nano-satellite according to Navigation Sensors using of Combination Method (TECHNICAL NOTE)
M. Shayan
morteza.shayana@yahoo.com
1
MANOUCHEHR Abbaszadehtoori
abbaszadehtoori@gmail.com
2
Department of New Technologies Engineering, Shahid Beheshti University
Department of New Technologies Engineering, Shahid Beheshti University
The purpose of this paper is to attitude estimation of Nano-satellite which requires navigation sensors data to less cost function and effection movement of Nano-satellite focus of the research is to using data of navigation sensors and methods to achieve the requirement of the attitude estimation. in this paper the following attitude estimation of the according to direction of sun of the Nano-satellite, the navigation attitude sensors is built with gyroscope, magnetometer and sun sensor. Furthermore, the extended Kalman filter is used to combination of measurement data from gyroscope, magnetometer and sun sensor. This paper presents the methods and accuracy for estimation attitude of Nano-satellite missions according of developed extended quaternion estimation and nonlinear then combination by extended Kalman filter. This paper presents of the application of Nano-satellite to navigation sensors, which require accuracy are the methods to achieve the high accurate attitude estimation and fast starting of estimation. A part of methods was simulated by Matlab then investigated of result together.
https://www.ije.ir/article_72538_fb0d2b1592566ddf853ffb3ef3c22ab1.pdf
Nanosatellite
attitude estimation
gyroscope
magnetometer and sun sensor
EKF
developed extended estimation quaternion
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
970
977
72539
Evaluation of Cell Growth and Substrate Consumption Kinetic of Five Different Lactobacilli in a Submerged Batch Whey Culture for Lactic Acid Production
Ghasem Najafpour
ije.editor8@gmail.com
1
Fazllolah Rezvani
rezvani1989@live.com
2
Fatemeh Ardestani
ardestani_fatemeh@yahoo.com
3
Biochemical & Chemical Engineering, Noshirvani University of Technology, Babol
Chemical Engineering, Islamic Azad University, Shahrood Branch
Chemical Engineering, Islamic Azad University, Qaemshahr Branch
Cell growth and lactose consumption profile of five Lactobacillus Strains: bulgaricus, casei, lactis, delbrueckii and fermentum has been investigated. Experiments of cell growth and substrate utilization were conducted in batch submerged culture of whey with added lactose and some other growth factors. Fitness assessment of experimental data on the cell growth and lactose consumption by Monod kinetic model was performed using the curve-fitting tool in Mat Lab software. Lactobacillus casei subsp. casei PTCC1608 with R2, μmax and Ks as 0.965, 0.435 h-1 and 27.05 g L-1, respectively showed the most fitness with Monod equation. Between the investigated strains, Lactobacillus fermentum PTCC1744 also showed an acceptable consistency with Monod kinetic model (R2= 0.951). Its μmax and Ks values were 0.134 h-1 and 54.46 g L-1, respectively. Lactobacillus delbrueckii subsp. Bulgaricus PTCC1737 (R2= 0.891) and Lactobacillus delbrueckii subsp. lactis PTCC 1743 (R2=0.857) did not have an accepted fitness with Monod kinetic model.
https://www.ije.ir/article_72539_8a895bbef5228fa68b8297ecd84b8742.pdf
Batch submerged culture
Lactic acid
Lactobacillus
Monod kinetic model
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
978
983
72540
Flexural Behavior of Polyester Polymer Concrete Subjected to Different Chemicals
Mohammad Jafar Hashemi
mj.hashemi@iust.ac.ir
1
Masoud Jamshidi
mjamshidi@iust.ac.ir
2
School of Chemical Engineering, Iran University of Science and Technology
School of Chemical Engineering, Iran University of Science and Technology
Polymer concrete (PC) is a composite material prepared by resin and aggregates. Advantages of polymer concretes include rapid curing at ambient temperatures, high flexural and compressive strengths, excellent chemical resistance and low permeability. In this research, a comparative study was performed on degradation of polyester resin concrete in different chemical solutions. Polymer concrete specimens were examined for flexural strength and flexural toughness after two and four months of exposure to the chemicals (i.e. sulfuric acid, sodium hydroxide, sodium sulfate, nitric acid, hydrochloric acid, citric acid, demineralized water, potable water, potassium hydroxide, gas oil). Results showed that the highest decrease in flexural strength (i.e. about 36%) was occurred in sodium hydroxide solution after two months of exposure. Comparing acid attack to the specimens it was found that citric acid as an organic acid, despite of higher pH, had the highest impact on flexural strength (i.e. about 21%). The flexural strength of PC specimens decreased considerablly in all chemicals (except in gas oil). There was not significant difference between two and four months of exposuring, therefore, the main degrading processes start during the first 60 days of exposuring.
https://www.ije.ir/article_72540_2a23669f1c064d1639daabdf5c8fa047.pdf
Polyester Resin
polymer concrete
Flexural Strength
chemical aggressive
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
984
994
72541
Offline Language-free Writer Identification based on Speeded-up Robust Features
Vijaypal Dhaka
vijaypal.dhaka@gmail.com
1
manoj sharma
manoj186@yahoo.co.in
2
, Jaipur National University, Jaipur
, Jaipur National University, Jaipur
This article proposes offline language-free writer identification based on speeded-up robust features (SURF), goes through training, enrollment, and identification stages. In all stages, an isotropic Box filter is first used to segment the handwritten text image into word regions (WRs). Then, the SURF descriptors (SUDs) of word region and the corresponding scales and orientations (SOs) are extracted. In the training stage, an SUD codebank is constructed by clustering the SUDs of training samples. In the enrollment stage, the SUDs of the input handwriting adopted to form an SUD signature (SUDS) by looking up the SUD codebank and the SOs are utilized to generate a scale and orientation histogram (HSO). In the identification stage, the SUDS and HSO of the input handwriting are extracted and matched with the enrolled ones for identification. Experimental results on eight public data sets demonstrate that the proposed method outperforms the state-of-the-art algorithms. Keywords: SUDS, codebank, SO, WRs.
https://www.ije.ir/article_72541_bc63f1c7667d0842b3150ffe6775751a.pdf
SUDS
codebank
SO
WRs
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
995
1001
72542
A Novel Protection Guaranteed, Quality of Transmission Aware Routing and Wavelength Assignment Algorithm for All-optical Networks
Ramesh Kumar Kasi
lkgfriend@gmail.com
1
Switching, BSNL
Transparent All Optical Networks carry huge traffic and any link failure can cause the loss of gigabits of data; hence protection and its guarantee becomes necessary at the time of failure. Many protection schemes were presented in the literature, but none of them speaks about protection guarantee. Also, in all optical networks, due to absence of regeneration capabilities, the physical layer impairments(PLI) accumulates along the lightpaths (LP) which causes sharp degradation of the Quality of Transmission (QoT), as measured by signal bit error rates (BER). The problem of protection with QoT issues was rarely studied in the literature. In this work, a novel protection backup path ensured, QoT aware Routing and Wavelength Assignment (RWA) algorithm called “Virtual Lit –Exhaustive Highest Q factor” (V-Lit EHQ) is presented which exhibits desirable qualities for reliable network operation. The results of the proposed work are compared with the standard QoT aware versions of the Shortest Path-First Fit schemes for both lit and dark protection. The blocking probability (BP) and BER are taken as the performance matrices and the proposed algorithm found to be outperforming as shown through simulations.
https://www.ije.ir/article_72542_d9e99abb5eddaf5a03240c9284d9e588.pdf
Optical networks
Protection
QoT
Routing and wavelength assignment
Physical layer impairments
shortest path
Blocking probability
WDM networks
Restoration
Quality of service
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
1002
1010
72543
Assessing the Impact of Size and Site of DGs and SMs in Active Distribution Networks for Energy Losses Cost
darush NAZARPOUR
d.nazarpour@urmia.ac.ir
1
Tohid Sattarpour
t.sattarpur@yahoo.com
2
Elecctrical Engineering, Urmia Univers
Elecctrical Engineering, Urmia Univers
The presence of responsive loads in the promising active distribution networks (ADNs) would definitely affect the power system problems such as distributed generations (DGs) studies. Hence, an optimal procedure is proposed herein which takes into account the simultaneous placement of DGs and smart meters (SMs) in ADNs. SMs are taken into consideration for the sake of successful implementing of demand response programs (DRPs) such as direct load control (DLC) with end-side consumers. Seeking to power loss minimization, the optimization procedure is tackled with genetic algorithm (GA) and tested thoroughly on IEEE 33-bus distribution test system. Different scenarios including variations in the number of DG units, adaptive power factor (APF) mode for DGs to support reactive power, and individual or simultaneous placing of DGs and SMs have been established and interrogated in depth. The obtained results certify the considerable effect of DRPs and APF mode in determining the optimal size and site of DGs to be connected in ADN resulting to the lowest value of power losses as well.
https://www.ije.ir/article_72543_0391801851389c354a3b457eaf93828a.pdf
Active distribution network (ADN)
distributed generations (DGs)
optimal siting and sizing
smart meters (SMs)
demand response programs (DRPs)
Loss reduction
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
1011
1020
72544
Sensorless Indirect Field Oriented Control of Single-sided Linear Induction Motor With a Novel Sliding Mode MRAS Speed Estimator
M. Reza Feyzi
feyzi@tabrizu.ac.ir
1
Mohammad Hosein Holakooie
hosein.holakooie@gmail.com
2
Faculty of Electrical & Computer Engineering, University of Tabriz, Iran
Electrical and Computer Engineering Department, Tabriz University
This paper proposes a new sliding mode control (SMC) based model reference adaptive system (MRAS) for sensorless indirect field oriented control (IFOC) of a single-sided linear induction motor (SLIM). The operation of MRAS speed estimators dramatically depends on adaptation mechanism. Fixed-gain PI controller is conventionally used for this purpose which may fail to estimate the speed correctly in different condition such as variation in the machine parameters. In this paper, PI controller is replaced by SMC based adaptation mechanism. One of the major problems of SMC is high-frequency chattering due to switching control function. In order to alleviate this problem, a new switching control function is presented. The SMC parameters are tuned using an off-line method through chaotic optimization algorithm (COA) because no design criterion is given to provide these values. The operation of sliding mode MRAS speed estimators (SM-MRAS) is validated by numerical simulation. The simulation results confirm the efficiency of proposed adaptation mechanism.
https://www.ije.ir/article_72544_1c9f9fb86d6720fb57e545463d83c302.pdf
Indirect field oriented control (IFOC)
Model reference adaptive system (MRAS)
sensorless
Sliding mode control (SMC)
Single
sided linear induction motor (SLIM)
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
1021
1030
72545
Drift Change Point Estimation in the rate and dependence Parameters of Autocorrelated Poisson Count Processes Using MLE Approach: An Application to IP Counts Data
Atefeh Ashuri
atefeh.ashuri@gmail.com
1
Industrial Engineering, Shahed University
Change point estimation in the area of statistical process control has received considerable attentions in the recent decades because it helps process engineer to identify and remove assignable causes as quickly as possible. On the other hand, improving in measurement systems and data storage, lead to taking observations very close to each other in time and as a result increasing autocorrelation between observations. The assumption of uncorrelated observations is unrealistic in many cases. However, less attention has been given to change point estimation in autocorrelated processes. Among the autocorrelated processes, count data are most widely used in real-world. Different applications of count data are discussed by many researchers such as syndromic surveillance data in healthcare, accident monitoring systems and multi-item pricing models in management science, and IP counts data. In this paper, we consider Poisson distribution for count processes and the first-order integer-valued autoregressive (INAR (1)) model. Then, we propose change point estimators for the parameters under linear trend, when observation arises from an autocorrelated Poisson count process using maximum likelihood estimators. We use a combined EWMA and c control chart to monitor the process. The simulation results confirm that the change point estimators are effective in identifying linear trend in the process parameters. Finally, application of the proposed change point estimators is illustrated through an IP counts data real case.
https://www.ije.ir/article_72545_ad947ce1101446332218b60d154ef63f.pdf
INAR (1) model
linear trend
maximum likelihood estimators
IP counts data
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
1031
1039
72546
Lot Streaming in No-wait Multi Product Flowshop Considering Sequence Dependent Setup Times and Position Based Learning Factors
Mona Jabbari
mona.jabbari@hotmail.com
1
Vahid Azizi
vahidazizi.ie@gmail.com
2
Department of Industrial Engineering, Bu-Ali Sina University
Department of Industrial Engineering, Bu-Ali Sina University
This paper considers a no-wait multi product flowshop scheduling problem with sequence dependent setup times. Lot streaming divide the lots of products into portions called sublots in order to reduce the lead times and work-in-process, and increase the machine utilization rates. The objective is to minimize the makespan. To clarify the system, mathematical model of the problem is presented. Since the problem is strongly NP-hard, two hybrid metaheuristics algorithms are proposed to solve the problem. These algorithms are based on the Variable Neighborhood Search (VNS), which is proved as an effective method for combinatorial optimization problems. In the proposed VNS, an efficient scheme for neighborhood search based on Tabu Search (TS) and Simulated Annealing (SA) is presented to strengthen the local searches. At the last part, computation results are provided to evaluate the efficiency of VNSSA and VNSTS. In order to verify the effectiveness of proposed algorithms, Relative percentage Deviation along with statistical analysis is presented. The computational results show that VNSSA outperforms VNSTS in most instances.
https://www.ije.ir/article_72546_ab6ad3e645991ebe02f55fd93a8e6160.pdf
NO
wait flowshop
Lot streaming
Sequence Dependent Setup Times
Variable neighborhood search
Tabu Search
Simulated Annealing
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
1040
1048
72547
A New Statistical Approach for Recognizing and Classifying Patterns of Control Charts (RESEARCH NOTE)
Mehdi Kabiri naeini
m_kabirinaeini@yahoo.com
1
, Payam Noor
Control chart pattern (CCP) recognition techniques are widely used to identify the potential process problems in modern industries. Recently, artificial neural network (ANN) –based techniques are very popular to recognize CCPs. However, finding the suitable architecture of an ANN-based CCP recognizer and its training process are time consuming and tedious. In addition, because of the black box nature, the outputs of the ANN-based CCP recognizer are not interpretable. To facilitate the research gap, this paper presents a statistical decision making approach to recognize and classify the patterns of control charts. In this method, by taking new observations from the process, the Maximum Likelihood Estimators of pattern parameters are first obtained and then in an iterative approach based on the Bayesian rule, the beliefs, that each pattern exists in the control chart, are updated. Finally, when one of the updated beliefs becomes greater than a predetermined threshold, a pattern recognition signal is issued. Simulation study is performed based on moving window recognition approach, and the accuracy and speed of method is evaluated and compared with the ones from some ANN-based methods. The results show that the proposed method has more accurate interpretable results without training requirement.
https://www.ije.ir/article_72547_962f647b113b6e71bd8fc7feb8f3b088.pdf
Statistical process control
Control chart
Pattern Recognition
Bayes rule
maximum likelihood estimation
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
1049
1058
72548
A Congested Double Path Approach for a Hub Location-allocation Problem with Service Level at Hubs
Hossein Karimi
h.karimi@ub.ac.ir
1
Ata Rezazad
a.s.rezazad@aut.ac.ir
2
Industrial Engineering, University of Bojnord
Department of Industrial Engineering and Managemen, Amirkabir University of Technology (Polytechnic)
In this paper an uncapacitated multiple allocation p-hub median problem is discussed. The model minimizes the transportation cost based on inventory service level at hubs through double paths between hubs. Inventory service level is defined as the percent of inventory shortage of vehicles at hubs according to passengers demand and replenishment time of vehicles. A real data from 25 nodes of municipality district 14 of Tehran is used to evaluate the performance of inventory service level in hub networks.
https://www.ije.ir/article_72548_8865b1eda7a885dbed044b6d6e7d2cab.pdf
Hub location allocation
inventory service level
Congestion
double path approach
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
1059
1067
72549
Isotonic Change Point Estimation in the AR(1) Autocorrelated Simple Linear Profiles
Fatemeh Sogandi
f.sogandi@shahed.ac.ir
1
Fateme Vakilian
f.vakilian@shahed.ac.ir
2
Industrial Engineering, Shahed university
Industrial Engineering, Shahed university
Sometimes the relationship between dependent and explanatory variable(s) known as profile is monitored. Simple linear profiles among the other types of profiles have been more considered due to their applications especially in calibration. There are some studies on the monitoring them when the observations within each profile are autocorrelated. On the other hand, estimating the change point leads to meet great saving time and costs. Hence, in this paper, a maximum likelihood estimator is derived for simple linear profiles with first order autoregressive autocorrelation structure within each profile to estimate monotonic change point. The performance of the proposed estimator is appraised and compared to estimators that derived under step change and drift and a confidence set estimator presented. The results demonstrate that the proposed estimator has better performance in small and medium shifts whereas the performance of their corresponding estimators becomes better than the proposed estimator in large shifts. It is worth mentioning that knowing type of the change is not important in the proposed estimator and its only assumption is belonging of the change type to a family of monotonic shifts. Finally, the performance of the estimator is illustrated through a real case.
https://www.ije.ir/article_72549_7ceb1800d9c7f2e2483cf3a463462e78.pdf
Simple linear profile
monotonic shift
Change Point Estimation
AR(1) models
Phase II
Hotelling T^2control chart
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
1068
1073
72550
Effect of Micellization pH on Properties of Sphere-like Mesoporous Hydroxyappatite
Mohammad Ali Shokrgozar
mashokrgozar@pasteur.ac.ir
1
Mohammad Erfan
m.erfan@sbmu.ac.ir
2
J. Javadpour
javadpourj@iust.ac.ir
3
Leila Bakhtiari
lbakhtiari@iust.ac.ir
4
National Cell Bank of Iran, Pasteur Institute of Iran
School of Pharmacy, Shahid Beheshti University of Medical Sciences
Materials Engineering, Iran University of Science and Technology (IUST)
Materials Engineering, Iran University of Science and Technology (IUST)
Mesoporous hydroxyapatites were syntesized by self-assembly method using Cetyltrimethylammonium bromide (CTAB) as cationic surfactant and 1-dodecanethiol as pore expander with pore expander/surfactant mass ratio of 4.22 and synthesis temperature of 80 °C in different micellization pH. The field emission-scanning electron microscopy (FESEM), x-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) surface area analysis, pore size distribution plot (Barrettt, Joyner, and Halenda (BJH) method), fourier transform infrared spectroscopy (FTIR) and Low-angle x-ray diffraction (LA-XRD) results beside the titration investigation of 1-dodecanethiol revealed that ionizied 1-dodecanethiol concentration ([RS-]) is increased exponentially by changes in pH. The micellization pH has a key role in Physico-chemical characteristics of samples. Increase in pH can change the ionization degree of 1-didecanethiol and swelled the micelle and also led to larger pores (pore diameter of 2.93 in lower pH and 24.48 in higher pH). Changes in the micellization pH also effect on the dielectric constant of water and led to variation in patricle size.
https://www.ije.ir/article_72550_4d4d8b6609f0603925a35b576a09d06d.pdf
Mesoporous
hydroxy appatite
micellization pH
Sphere
like
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
1074
1081
72551
Cutting Force Prediction in End Milling Process of AISI 304 Steel Using Solid Carbide Tools
PALANISAMY P
ppalanisamy2000@yahoo.com
1
KALIDASS S
skali_dass@yahoo.com
2
Mechanical Engineering, Dr.Navalar Nedunchezhiyan college of Engineering
Mechanical Engineering, Dr.N.G.P.Institute of Technology
In the present study, an attempt has been made to experimentally investigate the effects of cutting parameters on cutting force in end milling of AISI 304 steel with solid carbide tools. Experiments were conducted based on four factors and five level central composite rotatable design. Mathematical model has been developed to predict the cutting forces in terms of cutting parameters such as helix angle of cutting tool, spindle speed, feed rate and depth of cut. Response surface methodology was employed to create a mathematical model and the adequacy of the model was verified using analysis of variance. The direct and interaction effect of the process parameters with cross feed forces were analysed, which helped to select cutting parameters in order to keep cutting forces minimum, which ensures the stability of end milling process.
https://www.ije.ir/article_72551_74277d492004792e7fba74dda961030f.pdf
End Milling
Helix angle
Cutting force
AISI 304 steel
Solid carbide tools
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
1082
1089
72552
Damped Vibrations of Parabolic Tapered Non-homogeneous Infinite Rectangular Plate Resting on Elastic Foundation (RESEARCH NOTE)
U S Rana
drusrana@yahoo.co.in
1
Robin Singh
robin1986sr@gmail.com
2
Mathematics, D.A.V.P.G College,Dehradun
Applied sciences, Quantm school of technology
In the present paper damped vibrations of non-homogeneous infinite rectangular plate of parabolically varying thickness resting on elastic foundation has been studied. Following Lévy approach, the equation of motion of plate of varying thickness in one direction is solved by quintic spline method. The effect of damping, elastic foundation and taperness is discussed with permissible range of parameters. The frequency parameter Ω decreases as damping parameter Dk increases and it decreases faster in clamped-simply supported as compared to clamped-clamped boundary conditions. It was also observed that in the presence of damping parameter Dk the frequency parameter Ω decreases continuously with increasing value of taper parameter for both the boundary conditions but variations were found in the absence of damping parameter.
https://www.ije.ir/article_72552_a834b90a21e2b13a1f971087ae3e5185.pdf
Taperness
Elastic Foundation
damping
Isotropic
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
1090
1098
72553
Modelling and Numerical Simulation of Cutting Stress in End Milling of Titanium Alloy using Carbide Coated Tool
Bin Li
libinman@gmail.com
1
School of Mechanical Engineering, Luoyang Institute of Science and Technology
Based on the cutting force theory, the cutting stress in end milling operation was predicted satisfactorily through simulation of using finite element method. The mechanistic force models were introduced in high accuracy force predictions for most applications. The material properties in the simulations were defined based on the cutting force theory, as a function of strain and strain rate whereas in the theoretical relationships, these properties were simply kept constant. According to the analysis, the maximum deformation and effective stress showed an increasing trend for the machining with end-milling cutting tool. A reasonable set of milling parameters for the machining of titanium alloy by coated cemented carbide cutting tool were obtained by analyzing the cutting efficiency in relation to cutting force of the tools. It is expected that this study would provide a fundamental basis for the optimization of the cutting parameters for titanium alloy.
https://www.ije.ir/article_72553_3a0f7f46d09998cfaf0402c625cb17c0.pdf
finite element modeling
End
Milling
Cutting force
Simulation
eng
Materials and Energy Research Center
International Journal of Engineering
1025-2495
1735-9244
2015-07-01
28
7
1099
1107
72554
Experimental Investigation on Hydrous Methanol Fueled HCCI Engine Using Spark Assisted Method
MANIVANNAN A
mani1496@yahoo.com
1
KARTHIKEYAN R
r.karthi1968@gmail.com
2
SHENBAGA VINAYAGA MOORTHI N
nsvmoorthi@gmail.com
3
Venkatesan M
mechvenkatesan2013@gmail.com
4
V.C. SATHISH GANDHI
vcsgandhi@gmail.com
5
Mechanical Engineering, Regional Centre, Anna University, Tirunelveli
Mechanical Engineering, Shri Andal Alagar College of Engineering
Mechanical Engineering, University V.O.C College of Engineering Thoothukud
, University College of Engineering Nagercoil
Mechanical Engineering, University College of Engineering Ariyalur
The present work investigates the performance and emission characteristics of hydrous methanol fuelled Homogeneous Charge Compression Ignition (HCCI) engine. In the present work a regular diesel engine has been modified to work as HCCI engine. Hydrous methanol is used with 15% water content in this HCCI engine and its performance and emission behavior is documented. A spark plug is used for assisting auto-ignition. The spark timings are changed in steps of 3 degrees and the suitable timing that offers better phasing is called optimum Spark timing. From the investigation it is found that the hydrous methanol suits perfectly with HCCI engine and the water content present in the hydrous methanol helps to phase the combustion perfectly and to change the rate of combustion. The investigation also proves that the hydrous methanol operation reduces NO and smoke extremely low which is not possible by the direct injection CI engine. The water content present in the hydrous methanol helped to control the timing of auto ignition and helped to run HCCI engine smoothly. Therefore, it is beneficial to use hydrous methanol in internal combustion engines.
https://www.ije.ir/article_72554_21809509c126c4f2bef69e77a9e807b7.pdf
Hydrous methanol
HCCI
Spark assisted Performance
Emission and Combustion