Performance Optimization of HCCI Engine Fueled with Tamanu Methyl Ether

The energy crisis is increasing every day. The energy source for the automobile is from petroleum, which is a non-renewable form of energy source. The use of biodiesel in CI engine is not a novel research work, and it has certain advantages and disadvantages. The main disadvantages were higher smoke and NOx emission. The simultaneous reduction of smoke and NOx emissions is a challenging job because NOx increases with an increase in combustion temperature while smoke emission decreases with the increase of the same. The usage of Tamanu methyl ester (TME) in the HCCI engine has dual advantages such that there is a reduction not only in the dependency of non-renewable fuel but also in pollution. In this research, performance analysis of HCCI is done with TME fuel. Furthermore, to improve the performance and emission characteristics, the engine is operated at various operating conditions such as inlet air temperature (IAT) and injection pressure (IP) varying within the range from 100°C to 140°C and from 10 bar to 14 bar, respectively. From the results, it was found that the optimum IAT and IP are 120°C and 12bar, respectively. While optimizing the IP and IAT of HCCI engine, it produced a BTE which is almost equal to that of the conventional engine, and the emission of NOx and smoke was found to be lesser.

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Different Techniques to Mitigate Partial Shading in Photovoltaic Panels

Energies ◽

10.3390/en14133863 ◽

2021 ◽

Vol 14 (13) ◽

pp. 3863

Author(s):

Tiago Alves ◽

João Paulo N. Torres ◽

Ricardo A. Marques Lameirinhas ◽

Carlos A. F. Fernandes

Keyword(s):

Cell Model ◽

Research Work ◽

Experimental Tests ◽

Operating Conditions ◽

Pv System ◽

Partial Shading ◽

System Architectures ◽

Pv Systems ◽

Advantages And Disadvantages ◽

Pv Panel

The effect of partial shading in photovoltaic (PV) panels is one of the biggest problems regarding power losses in PV systems. When the irradiance pattern throughout a PV panel is inequal, some cells with the possibility of higher power production will produce less and start to deteriorate. The objective of this research work is to present, test and discuss different techniques to help mitigate partial shading in PV panels, observing and commenting the advantages and disadvantages for different PV technologies under different operating conditions. The motivation is to contribute with research, simulation, and experimental work. Several state-of-the-artsolutions to the problem will be presented: different topologies in the interconnection of the panels; different PV system architectures, and also introducing new solution hypotheses, such as different cell interconnections topologies. Alongside, benefits and limitations will be discussed. To obtain actual results, the simulation work was conducted by creating MATLAB/Simulink models for each different technique tested, all centered around the 1M5P PV cell model. The several techniques tested will also take into account different patterns and sizes of partial shading, different PV panel technologies, different values of source irradiation, and different PV array sizes. The results will be discussed and validated by experimental tests.

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Effect of Injection Pressure on Performance and Emission Characteristics HCCI Engines

International Journal of Vehicle Structures and Systems ◽

10.4273/ijvss.12.1.21 ◽

2020 ◽

Vol 12 (1) ◽

Author(s):

S. Gowthaman ◽

G. Balamurugan

Keyword(s):

Thermal Efficiency ◽

Fuel Injection ◽

Injection Pressure ◽

Particulate Emissions ◽

Compression Ignition Engine ◽

Performance And Emission ◽

Hcci Engine ◽

And Performance ◽

Fuel Injection Pressure ◽

Gas Recirculation

Homogeneous Charged Compression Ignition engine (HCCI) is a suitable replacement of conventional diesel engines as it provides higher thermal efficiency and low oxides of emission (NOx) and particulate emissions. In HCCI engine, direct controlling of ignition timing is not possible. But it can be controlled by varying the engine parameters such as fuel injection pressure, inlet air temperature and exhaust gas recirculation. In this study, HCCI engine is controlled with changing the injection pressure of the fuel and analysed for the effect of injection pressure of the fuel for emission and performance of Karanja methyl ester fuel. The experiments were conducted on HCCI engine with fuel injection pressures of 2 bar, 3 bar, 4 bar and 5 bar and the optimum fuel injection pressure is found out. The results show that, the brake thermal efficiency is increased when the injection pressure is increased due to better atomisation and fuel penetration and also resulted in low emissions (NOx, smoke) compared with diesel engine.

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Experimental Study of a Hydrogen-Fueled Engine

Journal of Engineering for Gas Turbines and Power ◽

10.1115/1.1339989 ◽

2000 ◽

Vol 123 (1) ◽

pp. 211-216 ◽

Cited By ~ 18

Author(s):

R. Sierens ◽

S. Verhelst

Keyword(s):

Combustion Process ◽

Injection Pressure ◽

Fuel Mixture ◽

Operating Conditions ◽

Lubricating Oil ◽

Intake Manifold ◽

Special Focus ◽

Injection Timing ◽

Complete Control ◽

Advantages And Disadvantages

The Laboratory of Transport Technology (Ghent University) converted a GM/Crusader V-8 engine for hydrogen use. The engine is intended for the propulsion of a midsize hydrogen city bus for public demonstration. For a complete control of the combustion process and to increase the resistance to backfire (explosion of the air–fuel mixture in the intake manifold), a sequential timed multipoint injection of hydrogen and an electronic management system is chosen. The results as a function of the engine parameters (ignition timing, injection timing and duration, injection pressure) are given. Special focus is given to topics related to the use of hydrogen as a fuel: ignition characteristics (importance of electrode distance), quality of the lubricating oil (crankcase gases with high contents of hydrogen), oxygen sensors (very lean operating conditions), and noise reduction (configuration and length of intake pipes). The advantages and disadvantages of a power regulation only by the air-to-fuel ratio (as for diesel engines) against a throttle regulation (normal gasoline or gas regulation) are examined. Finally, the goals of the development of the engine are reached: power output of 90 kW, torque of 300 Nm, extremely low emission levels, and backfire-safe operation.

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Performance and emission characteristics of fumigated butanol on a duel fuel mode hcci engine

E3S Web of Conferences ◽

10.1051/e3sconf/202130901228 ◽

2021 ◽

Vol 309 ◽

pp. 01228

Author(s):

Srinivas Kommana ◽

K. Mahesh Babu ◽

A.H.R Madhuri

Keyword(s):

Energy Demand ◽

Alternative Fuels ◽

Injection Pressure ◽

Mechanical Efficiency ◽

Emission Characteristics ◽

Oxides Of Nitrogen ◽

Performance And Emission ◽

Hcci Engine ◽

Engine Efficiency ◽

Ci Engines

To meet energy demand as well as emission regulations of today’s world moved the researchers towards the use of alternative fuels such as alcohols, biofuels in CI engine. Present work is to examine the performance and emission characteristics of fumigated butanol on a duel fuel mode HCCI engine. Experiments were performed for n-butanol fumigation (nBF) at constant speed 1500rpm with fixed mass flow rate under varying engine loads at compression ratio 17.5:1 and injection pressure 210 bar. Obtained test results showed that the mechanical efficiency increased by 7-8%, brake thermal efficiency increased by 7-13%, specific fuel consumption decreased by 4-10%. Emissions like smoke, oxides of nitrogen decreased significantly however carbon monoxide & hydrocarbons increased compared to diesel fuel. Finally, it is concluded that nBF method is best suitable for CI engines at medium engine loads for better engine efficiency and less smoke and NOx emissions.

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Effect of Fuel Injection Pressure and Preheating on the Performance and Emissions of a Vegetable Oil Fuelled Diesel Engine

ASME 2004 Internal Combustion Engine Division Fall Technical Conference ◽

10.1115/icef2004-0965 ◽

2004 ◽

Cited By ~ 1

Author(s):

Pugazhvadivu Serane ◽

Jeyachandran Krishnamurthy

Keyword(s):

Diesel Engine ◽

Vegetable Oil ◽

Fuel Injection ◽

Direct Injection ◽

Specific Energy Consumption ◽

Injection Pressure ◽

Operating Conditions ◽

Frying Oil ◽

Waste Frying Oil ◽

Performance And Emission

In the present investigation, waste frying oil, a non-edible vegetable oil is used as a diesel fuel substitute. Performance and emission tests were carried out in a naturally aspirated, single cylinder, direct injection diesel engine with and without preheating the waste frying oil and with fuel injection pressures of 190 bar, 210 bar, 230 bar and 250 bar. Performance parameters such as brake specific energy consumption and brake thermal efficiency and emission parameters such as NOx and smoke density were evaluated at various operating conditions. Increasing the injection pressure with and without preheating the fuel is found to improve the performance and reduce smoke emissions. At these conditions, the NOx concentration is seen to increase, however it is lower than pure diesel operation.

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MODERN EQUIPMENT FOR DETERMINING TRACTOR-SPEED PROPERTIES OF THE VEHICLE: CHARACTERISTICS’ ANALYSIS IN LABORATORY CONDITIONS

The Russian Automobile and Highway Industry Journal ◽

10.26518/2071-7296-2019-3-276-289 ◽

2019 ◽

Vol 16 (3) ◽

pp. 276-289

Author(s):

N. V. Savenkov ◽

V. V. Ponyakin ◽

S. A. Chekulaev ◽

V. V. Butenko

Keyword(s):

Environmental Performance ◽

Operating Conditions ◽

Special Role ◽

Development Stages ◽

Advantages And Disadvantages ◽

Force Transfer ◽

Characteristics Analysis ◽

And Performance ◽

Loading Devices ◽

Structural Solutions

Introduction. At present, stands with running drums are widely used for various types of tests. Power stands play a special role. Such stands take the mechanical power from the driving wheels of the car. This simulates the process of movement of the vehicle under operating conditions. Such equipment has various designs, principles of operation and performance. It is also used in tests that are different by purpose, development stages and types: research, control, certification, etc. Therefore, it is necessary in order to determine the traction-speed, fuel-efficient and environmental performance characteristics.Materials and methods. The paper provides the overview of the power stands with running drums, which are widespread on the domestic market. The authors carried out the analysis of the main structural solutions: schemes of force transfer between the wheel and the drum; types of loading devices; transmission layout schemes and features of the control and measuring complex. The authors also considered corresponding advantages and disadvantages, recommended spheres of application, demonstrated parameters and characteristics of the units’ workflow, presented components and equipment.Discussion and conclusions. The authors critically evaluate existing models of stands with running drums. Such information is useful for choosing serial models of stands and for developing technical tasks for designing or upgrading the equipment.

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ARCHITECTURE OF THE REPAIR AND MAINTENANCE MANAGEMENT SOFTWARE FOR A SERVICE ENTERPRISE

Automation and modeling in design and management of ◽

10.30987/2658-6436-2020-4-53-59 ◽

2020 ◽

Vol 2020 (4) ◽

pp. 53-59

Author(s):

Dmitriy Titarev ◽

Andrey Serikov ◽

Sergei Krivtsanov

Keyword(s):

Asset Management ◽

Software Package ◽

Service Management ◽

Research Work ◽

Maintenance Management ◽

Management Software ◽

Advantages And Disadvantages

The paper provides an overview of the architectures for the repair and maintenance management software package for a service enterprise. As part of the research work, asset management (EAM) and service management (ITSM) methodologies were studied. Three different architectures for the designed software package are proposed, their descriptions, advantages and disadvantages are given.

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ON COMPARATIVE ANALYSIS OF PERFORMANCE OPTIMIZATION METHODS OF MULTI-PUMP UNITS

СИСТЕМЫ УПРАВЛЕНИЯ И ИНФОРМАЦИОННЫЕ ТЕХНОЛОГИИ ◽

10.36622/vstu.2020.31.10.005 ◽

2020 ◽

pp. 23-28

Author(s):

A.I. Glushchenko ◽

M.Yu. Serov

Keyword(s):

Energy Efficiency ◽

Control System ◽

Comparative Analysis ◽

Performance Optimization ◽

Optimization Methods ◽

Online Optimization ◽

New Approach ◽

Advantages And Disadvantages ◽

Analysis Of Performance

В статье рассматривается вопрос совершенствования системы управления параллельно-работающими насосными агрегатами с целью повышения энергоэффективности их работы. Проведено сравнение и выявление недостатков существующих методов решения рассматриваемой проблемы. Предложена идея нового подхода на базе онлайн оптимизации. The problem under consideration is improvement of the energy efficiency of a control system of parallel-running pump units. Known methods used to solve this problem are considered. Their advantages and disadvantages are shown. Finally, the idea of a new approach, which is based on online optimization, is proposed.

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Energetic and exergetic analysis of a convective drier: A case study of potato drying process

Open Agriculture ◽

10.1515/opag-2020-0058 ◽

2020 ◽

Vol 5 (1) ◽

pp. 563-572

Author(s):

Iman Golpour ◽

Mohammad Kaveh ◽

Reza Amiri Chayjan ◽

Raquel P. F. Guiné

Keyword(s):

Energy Consumption ◽

Research Work ◽

Specific Energy Consumption ◽

Exergy Efficiency ◽

Operating Conditions ◽

Energy Utilization ◽

Convective Drying ◽

Drying Time ◽

Energy And Exergy ◽

Exergy Losses

AbstractThis research work focused on the evaluation of energy and exergy in the convective drying of potato slices. Experiments were conducted at four air temperatures (40, 50, 60 and 70°C) and three air velocities (0.5, 1.0 and 1.5 m/s) in a convective dryer, with circulating heated air. Freshly harvested potatoes with initial moisture content (MC) of 79.9% wet basis were used in this research. The influence of temperature and air velocity was investigated in terms of energy and exergy (energy utilization [EU], energy utilization ratio [EUR], exergy losses and exergy efficiency). The calculations for energy and exergy were based on the first and second laws of thermodynamics. Results indicated that EU, EUR and exergy losses decreased along drying time, while exergy efficiency increased. The specific energy consumption (SEC) varied from 1.94 × 105 to 3.14 × 105 kJ/kg. The exergy loss varied in the range of 0.006 to 0.036 kJ/s and the maximum exergy efficiency obtained was 85.85% at 70°C and 0.5 m/s, while minimum exergy efficiency was 57.07% at 40°C and 1.5 m/s. Moreover, the values of exergetic improvement potential (IP) rate changed between 0.0016 and 0.0046 kJ/s and the highest value occurred for drying at 70°C and 1.5 m/s, whereas the lowest value was for 70°C and 0.5 m/s. As a result, this knowledge will allow the optimization of convective dryers, when operating for the drying of this food product or others, as well as choosing the most appropriate operating conditions that cause the reduction of energy consumption, irreversibilities and losses in the industrial convective drying processes.

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