Investigation on Different Thermal Barrier-Coated Piston Engines Using Mahua Biodiesel
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ORIGINAL CONTRIBUTION
Investigation on Different Thermal Barrier-Coated Piston Engines Using Mahua Biodiesel Vidyasagar Reddy Gangula1,2 • Govindha Rasu Nandhana Gopal1 • Hariprasad Tarigonda2
Received: 1 April 2020 / Accepted: 2 October 2020 The Institution of Engineers (India) 2020
Abstract In this paper, the effect of the thermal barrier coated (TBC) on top of the piston used in CI engine was investigated when diesel and mahua biodiesel (MB 100) were used as fuel. Three pistons were selected for TBC with a thickness of 0.05 mm as a bond coat and 0.25 mm as a topcoat. The first piston was coated with 7% YSZ (LHR 1), second piston was coated with 2%Nd ? YSZ (LHR 2) and third piston was coated with 5%Nd ? YSZ (LHR 3) as a topcoat for the three pistons Ni–Cr–Al–Y used as a bond coat in all coatings using plasma spray technique. The exploration of work is performed in a fourstroke, single-cylinder naturally aspirated diesel engine. In this study, standard engine with diesel and mahua biodiesel with three different TBC pistons like low heat rejection (LHR 1, LHR 2 and LHR 3) with mahua biodiesel was compared. The study shows that the brake thermal efficiency of an LHR 3 with mahua biodiesel is 11% higher than that of STD engine. The brake specific fuel consumption of an LHR 3 with mahua biodiesel was reduced by 13% lower than the STD engine. The HC and CO emissions were reduced by 13% and 16% for LHR 3 engine when compared to STD engine, but the NOx emission was marginally increased by 18% for LHR 3 engine. Keywords LHR engine TBC YSZ Nd2O3 Plasma spray technique Mahua biodiesel & Vidyasagar Reddy Gangula [email protected] 1
School of Mechanical Engineering, VIT University, Vellore 632 014, India
2
Sree Vidyanikethan Engineering College, Tirupathi 517102, India
Abbreviations LHR Low heat rejection IC Internal combustion YSZ Yttria-stabilized zirconia Nd2O3 Neodymium oxide BTE Brake thermal efficiency TBC Thermal barrier coating DI Direct injection BSEC Brake specific energy consumption NOx Nitrogen oxide BSFC Brake specific fuel consumption HC Hydrocarbon CO Carbon monoxide EGT Exhaust gas temperature B 100 Mahua biodiesel 100% STD Standard engine
Introduction Presently, the research on IC engines is focused on decreasing the cost of engines and fuel utilization. Also, the technological innovation studies are being carried out. In this connection, ceramic coating in internal combustion engines is one of the promising alternatives. Ceramic coatings act as an insulator to resist the heat transfer from cylinder to the engine cooling system. Nowadays, the researchers concentrated on removing the cooling system in the IC engines. In this way, the cost and weight of the engine will decrease and higher efficiency can be achieved. Many researchers use the thermal barrier coating mainly to increase heated conflicts within the com-
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J. Inst. Eng. India Ser. C
bustion chamber and thus improve BTE of the surviving engines. The approximate heat energy distribution in the conventional engines and in
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