Experimental investigation of heat losses in a ceramic coated diesel engine

Taymaz, İmdat; Çakir, Kevser; Gür, Mesut; Mimaroğlu, A.

doi:10.1016/s0257-8972(03)00220-2

Cited by 64 publications

(28 citation statements)

References 1 publication

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“…The LHR engine has been conceived basically to improve fuel economy by eliminating the conventional cooling system and converting part of the increased exhaust energy into shaft work using the turbocharged system. A large number of studies on performance, structure and durability of the Thermal Barrier Coated (LHR) engine have been carried out [3,4,5,6,7,8,9,10,11,12,13,14,15,16,17]. Although promising the results if the investigations have been somewhat mixed.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Thermal Barrier Coated Diesel Engine Performance with Blends of Diesel and Palm Biodiesel

Modi¹,

Gosai²

2010

SAE Int. J. Fuels Lubr.

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Energy conservation and efficiency have been the quest of engineers concerned with internal combustion engine. Theoretically, if the heat rejected could be reduced, then the thermal efficiency would be improved, at least up to the limit set by the second law of thermodynamics. Low Heat Rejection engines aim to do this by reducing the heat lost to the coolant. For current work a ceramic coated twin cylinder water-cooled diesel engine using blends of diesel and palm biodiesel as the fuel was evaluated for its performance and exhaust emissions. In recent years, Considerable efforts were made to develop and introduce alternative renewable fuel, to replace conventional petroleum-base fuels. Here, the diesel engine was insulated by Partially Stabilized Zirconia (PSZ) as ceramic material attaining an adiabatic condition. The cycle average gas temperature and metal surface temperature are higher in adiabatic engine. For the present study the biodiesel was prepared in laboratory from non-edible vegetable oil (Palm oil) by transesterification process with methanol, where potassium hydroxide (KOH) was used as a catalyst. An experimental investigation of the performance of a ceramic coated engine was carried out with palm bio-diesels and its blends, the results were compared to the experiment done with the conventional petroleum diesel. Multi cylinder vertical water cooled self-governed diesel engine, piston, top surface of cylinder head and liners were fully coated with Partially Stabilized Zirconia (PSZ). Experimental test set-up was developed in laboratory. The stationary diesel engine was run in laboratory at a medium speed, variable load condition experienced in most urban driving conditions and various measurements like fuel flow, exhaust temperature, exhaust emission measurement and exhaust smoke test were carried out. The results indicate improved fuel economy and reduced pollution levels for the Thermal Barrier Coated (TBC) engine. The fuel properties of biodiesel such as kinematic viscosity, calorific value, flash point, carbon residue and specific gravity were found. Results indicated that Bio-diesels had lower brake thermal efficiency mainly due to its high viscosity compared to diesel. For biodiesel fuel, the exhaust gas temperature increased with increase in power and amount of biodiesel. However, during performance test it showed reasonable efficiencies, lower smoke, SO2, PM (particulate matter) and CO with some increase in emission of oxides of nitrogen. Biodiesel also increased efficiency in reducing particulate emissions. Regulated emissions and performance data were generated, and a detailed emission was performed. Fuel properties were close to the standard limit for diesel fuel. The use of palm biodiesel resulted in lower emissions of unburned hydrocarbons, carbon monoxide, and particulate matter, with some increase in emissions of oxides of nitrogen. NEED OF LOW HEAT REJECTION ENGINEEnergy conservation and efficiency have been the quest of engineers concerned with internal combustion engines. From the he...

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Thermal Barrier Coated Diesel Engine Performance with Blends of Diesel and Palm Biodiesel

Modi¹,

Gosai²

2010

SAE Int. J. Fuels Lubr.

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“…Prevention of this separation can be accomplished in two ways: by adding an emulsifier acting to suspend small droplets of ethanol within the diesel fuel, or by adding a co-solvent acting as a bridging agent through molecular compatibility and bonding to produce a homogenous blend [4]. A new trend in the field of internal combustion engines is to insulate the heat transfer surfaces as a combustion chamber, cylinder wall, cylinder head, piston and valves by ceramic insulating materials for the improvement of engine performance and elimination of the cooling systems [5].…”

Section: Introductionmentioning

confidence: 99%

Performance and Energy Balance of a Low Heat Rejection Diesel Engine Operated With Diesel Fuel and Ethanol Blend

Ciniviz

2010

Transactions of the Canadian Society for Mechanical Engineering

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In this study, it was aimed to investigate the effect of ceramic coating on a turbocharged diesel engine performance and energy balance. For this purpose, cylinder head, valves and pistons of the engine were coated with yttria stabilized zirconia layer with a thickness of 0.35 mm nickel-chromium- aluminium bond coat, as well as the atmospheric plasma spray coating method with a thickness of 0.15 mm. Then, the engines were tested for full load. The heating values of the diesel fuel and ethanol were 46.2 and 25.182 MJ/kg, respectively. Because of the lower heating values of the ethanol, compared with the diesel fuel, it appears to have lower following to engine power, torque and SFC. Compare to engine power of SDE, LHRe has increased about 2%, LHReth has decreased about 22% at all engine speed. Compare to engine torque of SDE, LHRe has increased about 2.5%, LHReth has decreased about 23 % at all engine speeds. Compare to SFC of SDE, LHRe has decreased about 1.1 %, LHReth has increased about 54 % at all engine speeds. Compare to exhaust turbine inlet temperature of SDE, LHRe has increased about 15 %, LHReth has decreased about 17 % at all engine speeds.

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“…NOx emissions are mainly a function of combustion gas temperature and residence time. Kinetics of NOx formation is governed by Zeldovich and the availability of Oxygen [27]. An increase in after-combustion temperature causes an increase in NOx emission.…”

Section: Nitrogen Oxide (Nox) Emissionmentioning

confidence: 99%

Comparative studies on fly ash coated low heat rejection diesel engine on performance and emission characteristics fueled by rice bran and pongamia methyl ester and their blend with diesel

Mohamedmusthafa

Sivapirakasam

Udayakumar

2011

Energy

102

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Experimental investigation of heat losses in a ceramic coated diesel engine

Cited by 64 publications

References 1 publication

Experimental Study on Thermal Barrier Coated Diesel Engine Performance with Blends of Diesel and Palm Biodiesel

Experimental Study on Thermal Barrier Coated Diesel Engine Performance with Blends of Diesel and Palm Biodiesel

Performance and Energy Balance of a Low Heat Rejection Diesel Engine Operated With Diesel Fuel and Ethanol Blend

Comparative studies on fly ash coated low heat rejection diesel engine on performance and emission characteristics fueled by rice bran and pongamia methyl ester and their blend with diesel

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