Experimental Analysis and Energy Balance on Thermal Barrier-Coated Piston Diesel Engine Using Biodiesel
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ORIGINAL CONTRIBUTION
Experimental Analysis and Energy Balance on Thermal Barrier-Coated Piston Diesel Engine Using Biodiesel Vidyasagar Reddy Gangula1,2 • Govindha Rasu Nandhana Gopal1 • Hariprasad Tarigonda2
Received: 24 April 2019 / Accepted: 7 August 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 jatropha biodiesel (JB 100) were used as fuel. Two pistons were selected for TBC coating with a thickness of 50 l as a bond coat and 250 l as a topcoat. The first piston was coated with 7% YSZ (LHR 1) and second piston is coated with 2% Nd ? YSZ (LHR 2) as a topcoat for the two pistons Ni–Cr–Al–Y used as a bond coat. Experiments were conducted to study the performance, emission and energy balance using standard piston and TBC-coated pistons. The results show that the BTE of an LHR 2 engine using JB 100 is 4.2% higher than the STD diesel engine. The BSFC of an LHR 2 engine using JB 100 fuel was reduced by 11.4% lower than the STD diesel engine. The HC and CO emissions were declined by 20% and 16% for the LHR 2 engine while comparing with the STD diesel engine and NOx emissions were increased by 15% in the LHR 2 engine with JB 100. Keywords Nd2O3 Low heat rejection engine Thermal barrier coatings YSZ Jatropha biodiesel Abbreviations IC Internal combustion TBC Thermal barrier coating Nd2O3 Neodymium oxide JB 100 Jatropha biodiesel 100% & Hariprasad Tarigonda [email protected] 1
School of Mechanical Engineering, VIT University, Vellore 632 014, Tamilnadu, India
2
Sree Vidyanikethan Engineering College, Tirupathi 517102, Tamilnadu, India
LHR BTE STD CI HC CO NOx EGT YSZ BSFC
Low heat rejection Brake thermal efficiency Standard engine Compression ignition Hydro carbon Carbon monoxide Nitrogen oxide Exhaust gas temperature Yttria-stabilized zirconia Brake specific fuel consumption
Introduction The present challenges on IC engines are currently focused on reducing engine cost and better fuel consumption, and some technological innovation studies are also conducted [1]. Energy demand is one of most important assessment aspects for the IC engine. In particular, from the thermodynamics second law, it states that total input energy is not possible to transform into useful work. In other words, 100% efficiency can never be achieved due to some amount of heat rejection in the exhaust gases, heat loss due to coolant and unaccounted losses. In this connection, ceramic coating in IC engine is one of the promising alternatives. Ceramic coatings act as an insulator to resist the heat transfer from cylinder to the engine cooling system. Researchers are mainly focusing 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 [2]. The LHR ideas have gained attention through the 1980s, when a wide range of researchers studied the ‘‘semi-
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J. Inst. Eng. India Ser. C
adiabatic engine.
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