Combustion Characteristics of a Semi-Adiabatic Diesel Engine with Plastic Oil with Supercharging | Chapter 8 | Techniques and Innovation in Engineering Research Vol. 1

 Plastic waste cannot biodegrade. It poses health risks to both people and livestock. Researchers discovered that it has natural carcinogenic properties. Oil made from plastic can be used in internal combustion engines. The need for alternative fuels has become urgent given the rapid depletion of fossil fuels, the continuous rise in pollution caused by fossil fuels, and the rising cost of importing crude oil, which could have been invested in other crucial areas like agriculture, health, and poverty alleviation. Due to their renewable nature, vegetable oils and alcohols are crucial diesel fuel replacements. Alcohols have a high volatility but a low calorific value and cetane number, which is a gauge of the quality of the combustion in a diesel engine. Vegetable oils, on the other hand, have comparable cetane numbers and calorific values. However, they are both highly viscous and quite stable. Plastic oil, which can be produced from waste materials using a process called pyrolysis and has qualities that are similar to those of diesel fuel, is an excellent substitute for diesel fuel. Plastic oil, however, has a high viscosity. The plastic oil was supplemented with diethyl ether (DEE) in the recommended quantity (15%) to lower viscosity and increase cetane number. These viscous fuels can be burned efficiently in semi-adiabatic diesel engines or low heat rejection engines (SADE). The goal of SADE is to create hot combustion chambers appropriate for burning highly viscous fuels by minimising heat loss to the coolant. The SADE's powerplant was air gap insulated. If the architecture of the combustion chamber was altered from a standard combustion chamber to an insulated combustion chamber, it is important to determine or assess the combustion characteristics of the test fuels. This report's objective was to identify the combustion characteristics of peak pressure (PP), time of peak pressure (TOPP), and maximum rate of pressure rise (MRPR) during full load operation of the engine using both versions of the engine, such as conventional engine (CE) and SADE with and without supercharging and with different injection timing. Supercharging is the process of adding more (oxygen) air at a high pressure to the engine's inlet manifold in order to increase engine output. The TDC (top dead centre) encoder was linked to the extended portion of the extended shaft of the dynamometer, and the piezoelectric transducer was connected to the top portion of the cylinder head. The TDC encoder and transducer were both attached to the console. The console transforms the magnetic signal from the TDC encoder and the pressure signal from the transducer into an electric signal that is fed to the computer. When operating at full load, the computer reads the combustion parameter data. An electronic sensor was used to change the injection timing. SADE's enhanced injection time improved the combustion characteristics at full load operation.

Author(s) Details:

Aditya Seshu Machiraju,
Department of Mechanical Engineering, Osmania University, India.

M. V. S. Murali Krishna,
Department of Mechanical Engineering, Chaitanya Bharathi Institute of Technology, India.

P. Ushasri,
Department of Mechanical Engineering, University College of Engineering, Osmania University, India.

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