Investigation and Optimization of Piston with Different Compositions in Existent Combustion Circumstance (original) (raw)
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International Journal of Emerging Trends in Engineering Research, 2021
Investigation of the thermal analysis of a conventional (uncoated) diesel piston made up of Aluminum silicon alloy was carried out in this present study. Secondly, thermal analysis was performed on piston crown, coated with 20% Al 2 O 3 & 80% Yttria Stabilized Zirconia material. TBC comes with two layers; the first layer is a bond coating with NiCoCrAlY compound. The second layer with TBC material (20% Aluminum oxide & 80% Yttria Stabilized Zirconia). The method of multilayer coating was achieved through the Air Plasma spraying technique. Using the coated piston the required temperature in the combustion chamber will be maintained. This will reduce the heat loss to the piston. This reduction in the heat loss will be used to burn the un-burnt gases thereby reducing the polluted exhaust gases. Result will be shown as the thermal efficiency of the coated piston at full load will be increased than uncoated piston and the oxides of nitrogen will be increased.
AN EVALUATION OF THE EFFECTS OF COATING WITH THERMAL BARRIER ON ENGINE PERFORMANCE IN DIESEL ENGINE
2010
Increasing the performance of an internal combustion engine requires the transformation of total fuel energy to useful energy at the highest as possible. Increase of inner cylinder heat plays important role in the increase of engine performance and decrease of exhaust emissions. It is understood as a result of literature studies that coating combustion chamber elements with thermal barriers contributes a lot to the increase of inner cylinder heat. This study includes an evaluation of experimental studies and its results carried out upon the methods applied on coating with thermal barrier in diesel engines, the effects of coating on the performance of engine and exhaust emissions.
Journal of critical reviews
To analyze performance of a twin cylinder four stroke CI engine whose piston is coated with a ceramic material and experiments are carried out at different cooling rates. Research & Development technique is used for decreasing costs and consumption of fuel in internal combustion engines and technological innovation studies are going on continuously. Through various constructional changes engine efficiency development efforts are augmented day by day; for instance, parallel to development of advanced technology ceramics, ceramic coating applications in IC engines grows fast. In order to get better engine performance, fuel energy must be converted to machine energy at the most possible rate. Lower heat rejection from combustion chamber through thermally insulated components leads to increase in available energy that will raise the cylinder work and total energy carried by the engine exhaust, which could be also utilized. The research engine was a four-stroke, direct injection, twin cylinder, water cooled CI engine. It was tested at constant speed and different load conditions before coating. Also Piston was coated with 0.5mm size of Zirconia (ZrO2) over a 150 μm thickness of NiCrAlY bond coat. The engine was tested at standard conditions to study the effect of coated surfaces of piston on its performance and emissions of the engine. The ceramic-coated engine performance is to be compared with conventional uncoated engine performance. Engine exhaust such as NOx CO, CO2 and Unburned Hydro Carbons are to be determined with the aid of exhaust gas analyzer by conducting several experimental cycles at various loads i.e., at 0.5,1,1.5,2,2.5& 3 K.W load after piston is coated by ceramic material.
Application of Thermal Barrier Coatings in Diesel Engines: a Review
Energy and Power, 2012
A review of research on low heat rejection engines, to incorporate various systems of ceramic materials in intermittent combustion engines, and on the use of ceramics in these engines is presented. The reduction of heat loss from the combustion chamber of diesel engines improves fuel efficiency only by 3 or 4 per cent. Some other gains may be possible from a smaller cooling system, recovery of exhaust energy, and improvements in aerodynamics. The use of thermal barrier coatings (TBCs) to increase the combustion temperature in diesel engines has been pursued for over 20 years. Increased combustion temperature can increase the efficiency of the engine, decrease the CO and (possibly) the NOx emission rate. However, TBCs have not yet met with wide success in diesel engine applications because of various problems associated with the thermomechanical properties of the coating materials. Although, the in-cylinder temperatures that can be achieved by the application of ceramic coatings can be as high as 850-9000C compared to current temperatures of 650-7000C. The increase in the in-cylinder temperatures helped in better release of energy in the case of biodiesel fuels thereby reducing emissions at, almost the same performance as the diesel fuel. The purpose of this paper is to explain the effect of insulation on engine performance, heat transfer characteristics, combustion and emission characteristics. Many researchers have carried out a large number of studieson Low Heat Rejection Engine (LHRE) concept. Some of them are experimental work and many are theoretical studies. In the case of LHR engines almost all theoretical studies predict improved performance but many experimental studies show different picture. This paper analyses the reason for this deviation. The operating conditions, under which the experimental and simulation studies are carried out, have been clearly discussed. The factors, which affect thermal efficiency, combustion, and exhaust emissions in LHR engine, are deduced and their influences discussed.
Use of Thermal Barrier Coating In Diesel Engine
Journal of emerging technologies and innovative research, 2018
The Experimental work is carried out under different loading conditions with same compression ratio on the Research Engine Set-up, single cylinder, four stroke, water cooled, multi fuel variable compression ratio (VCR) diesel engine, with its piston crown, cylinder head and valve top surface coated with Nickel Chromium Aluminum (NiCrAl) as bond coat and Yattria Stabilized Zirconia (YSZ) as a top coat to understand the effect of thermal barrier coating on the performance and emission characteristics in comparison with baseline engine characteristics.YSZ material is taken as the top coat material because of its desirable properties such as the high coefficient of thermal expansion, low conductivity, low heat capacity, high resistance to fatigue stress, creep stress, thermal shock stress, high Poisson ratio and stable at the high temperature condition. Performance characteristics are found out by using I.C. Engine combustion analysis software, smoke and exhaust gas emission is measured...
International Research Journal of Multidisciplinary Technovation
Improvement in thermal efficiency and reduction in emission from diesel engines are major thrust research work in all around the world. This research work is on the performance and emission characteristics of diesel engine using Low Heat Rejection (LHR) techniques of thermal barrier coated cylinder liner and piston. A piston was coated as 100 micron thickness and three cylinder liners were coated in the thickness of 100,150 and 200 micron. Piston and cylinder liners were coated with equal percentages of Alumina and Yittria Stabilized Zirconia powder using the plasma spraying coating method. The test results compared with base engine showed reduction in the performance parameter of specific fuel consumption (SFC) on an average by 6.11%, 12.78% and 16.89%, while the brake thermal efficiency increased by 1.68%,3.75% and 5.19% in 100,150 and 200 micron thickness coated cylinder liner used engine respectively. There was reduction in Carbon monoxide (CO), unburned hydrocarbon (HC) and smo...
An Experimental Investigation of Piston Coating on Internal Combustion Engine
The thermal efficiency of most commercially used engine ranges from 38% to 42%, as nearly 58% to 62% of energy is lost in the form of waste heat. In order to save energy the hot parts are insulated. This will lead to reduction in heat transfer through the engine, involving an increased efficiency. Change in combustion process due to insulation also affects emissions. In this study an attempt is made to reduce the intensity of thermal and structural stresses by using a layer of ceramic material. Experimental investigation is carried out under different loading conditions on single cylinder two stroke spark ignition engine with its piston crown coated with Nickel-Chromium & Al2O3 to understand the influence of thermal barrier coating (TBC) on performance characteristics. Al2O3 is chosen as a candidate material for coating the piston crown because of its desirable physical properties like low thermal conductivity, high coefficient of thermal expansion, high thermal resistance, chemical inertness, high resistance to erosion, corrosion and high strength. Thermal barrier coating (TBC) is done by using Plasma Spraying Technique. Engine working conditions are maintained constant before and after coating. Experimental results revealed that the thermal efficiency is increased by 13.75%, Mass of fuel consumption is reduced by 6.02% and brake specific fuel consumption is reduced by 9.84% between coated and bare engine.
EFFECT OF THERMAL BARRIER COATING ON PERFORMANCE AND EMISSION CHARACTERISTICS OF A DIESEL ENGINE
The main objective of this present study is to evaluate the performance characteristics of thermal barrier coating in direct injection diesel engine. Combustion chamber of the engine (piston crown, cylinder head and valves) were coated with partially stabilized zirconia of 0.5 mm thickness. Plasma spray coating technique has been used to coat the engine components. Experiments were carried out in a single cylinder, four stroke direct injection diesel engine. The results showed that, the brake thermal efficiency of diesel engine is increased marginally after ceramic coating. Also, the specific energy consumption decreased with engine coating. Carbon monoxide and hydrocarbon emission levels are decreased but in contrast, the oxide of nitrogen emission level was increased due to the higher peak temperature.
The effect of thermal barrier coatings on diesel engine performance
Surface and Coatings Technology, 2007
Ceramic coatings hold significant promise in the reduction of wear and abrasion failure in reciprocating and rotary engines for transportation and stationary power. They also have application as thermal barriers to improve the efficiency of the engines, by reducing energy loss and cooling requirements. In this study, the effects of ceramic coating on the performance of the diesel engine were investigated. The research engine was a fourstroke, direct injected, six cylinder, turbo-charged and inter-cooled diesel engine. This engine was tested at different speeds and loads conditions without coating. Then, the combustion chamber surfaces, cylinder head, valves and piston crown faces were coated with ceramic materials. The layers were made of CaZrO 3 and MgZrO 3 and plasma coated onto the base of the NiCrAl bond coat. The ceramic-coated research engine was tested at the same operation conditions as the standard (without coating) engine. The results indicate a reduction in fuel consumption and an improving effective efficiency of the engine.
INTERNATIONAL RESEARCH JOURNAL OF MULTIDISCIPLINARY TECHNOVATION, 2019
Improvement in thermal efficiency and reduction in emission from diesel engines are major thrust research work in all around the world. This research work is on the performance and emission characteristics of diesel engine using Low Heat Rejection (LHR) techniques of thermal barrier coated cylinder liner and piston. A piston was coated as 100 micron thickness and three cylinder liners were coated in the thickness of 100,150 and 200 micron. Piston and cylinder liners were coated with equal percentages of Alumina and Yittria Stabilized Zirconia powder using the plasma spraying coating method. The test results compared with base engine showed reduction in the performance parameter of specific fuel consumption (SFC) on an average by 6.11%, 12.78% and 16.89%, while the brake thermal efficiency increased by 1.68%,3.75% and 5.19% in 100,150 and 200 micron thickness coated cylinder liner used engine respectively. There was reduction in Carbon monoxide (CO), unburned hydrocarbon (HC) and smoke emissions levels while Nitrogen Oxide (NOx) emission was slightly higher in the coated engine compared with the uncoated engine in all load conditions. Overall, 200 microns thickness coated cylinder liner showed a better performance parameter and low emission compared with other cylinder liner coated engine.