Abstract
In this study, an innovative Low Temperature Combustion (LTC) system named Temperature Controlled Reactivity Compression Ignition (TCRCI) is presented, and a numerical optimization of the hardware and the operating parameters is proposed. The studied combustion system aims to reduce the complexity of the Reaction Controlled Compression Ignition engine (RCCI), replacing the direct injection of high reactivity fuel with a heated injection of low reactivity fuel. The combustion system at the actual state of development is presented, and its characteristics are discussed. Hence, it is clear that the performances are highly limited by the actual diesel-derived hardware, and a dedicated model must be designed to progress in the development of this technology. A Computational Fluid Dynamics (CFD) model suitable for the simulation of this type of combustion is proposed, and it is validated with the available experimental operating conditions. The Particle Swarm Optimization (PSO) algorithm was integrated with the Computational Fluid Dynamic (CFD) software to optimize the engine combustion system by means of computational simulation. The operating condition considered has a relatively high load with a fixed fuel mass and compression ratio. The parameters to optimize are the piston bowl geometry, injection parameters and the boosting pressure. The achieved system configuration is characterized by a wider piston bowl and injection angle, and it is able to increase the net efficiency of 3% and to significantly reduce CO emissions from 0.407 to 0.136 mg.
Funder
Universitat Politècnica de València
Generalitat Valenciana
Subject
Energy (miscellaneous),Energy Engineering and Power Technology,Renewable Energy, Sustainability and the Environment,Electrical and Electronic Engineering,Control and Optimization,Engineering (miscellaneous),Building and Construction
Reference30 articles.
1. Ferrari, G. Motori a Combustione Interna, 2016.
2. A review on low temperature combustion engines: Performance, combustion and emission characteristics;Krishnamoorthi;Renew. Sustain. Energy Rev.,2019
3. Review of high efficiency and clean reactivity controlled compression ignition (RCCI) combustion in internal combustion engines;Reitz;Prog. Energy Combust. Sci.,2015
4. Lakshminarayanan, P.A., and Aghav, Y.V. Modelling Diesel Combustion, 2010.
5. Evaluation of the potentials of Temperature Controlled Reactivity Compression Ignition combustion for efficiency increase in CI engines;Gazzola;J. Clean. Prod.,2022