Environmental #RSCEnv’s Post

🔬 Exciting News! Our Latest Research is Published! 📄 I'm thrilled to share that our new research paper, “Influence of Intake Charge Temperature and EGR Rate on the Combustion and Emission Characteristics of Ammonia/Diesel Dual-Fuel Engine,” has been published in the SAE Technical Paper series (Paper No. 2024-37-0025). This study, conducted in collaboration with esteemed colleagues Marziyeh Hoseinpour (Ferdowsi University of Mashhad), Mohammad Mahdi Salahi, Amin Mahmoudzadeh Andwari (University of Oulu), Ayat Gharehghani (Iran University of Science & Technology), and Antonio Garcia (Universitat Politecnica de Valencia), explores innovative strategies to integrate ammonia into conventional diesel engines, focusing on the role of intake charge temperature and EGR rate in optimizing combustion and reducing emissions. Key findings include: CO2 Reduction: Up to 30% under specific conditions (390K, 40% NH3, and EGR20). NO2 Reduction: Approximately 65% compared to diesel under the conditions of (360K, 20% NH3, and EGR20). NH3 Reduction: Peaks at higher temperatures with a 50% decrease observed. The paper is now available online, and I invite you to read it and explore our findings. 📅 Published: 12 Jun 2024 🔗 https://lnkd.in/g_8e-Ng9 doi:10.4271/2024-37-0025 Thank you to all my co-authors and collaborators for their valuable contributions to this research! Best regards, Rahim Karami Central Queensland University #Research #AmmoniaFuel #Combustion #Emissions #Engineering #DualFuel #SustainableEnergy #SAE

Hydrogen is an attractive solution for net-zero initiatives. Hydrogen fuel possesses higher flame speed, lower ignition energy requirements, and wider flammability limit compared to typical hydrocarbons. While these characteristics improve efficiency and stability, they also produce key challenges such as flashback and other safety-related issues. Korea Advanced Institute of Science and Technology, Daejeon, and Ansys are developing computational fluid dynamics methods and best practices for predicting flame structure for hydrogen-methane blended flames using large eddy simulations. Click the link below to learn more about the research being conducted at KAIST combustion dynamics and diagnostics laboratory.

I am thrilled to share that my latest article, titled Strategic Optimization of Dual-Fuel Diesel/Gas Engines by Numerical Approach for Environmental and Economic Benefits, has been published in International Communications in Heat and Mass Transfer journal (Q1- IF:6.4).  This research delves into closed cycle simulation of Dual-Fuel Gas/Diesel engines (IVC to EVO) in various modes. for comprehensive analysis of results, we used ANN and TOPSIS methods to obtain a suitable engine map. These results can help automotive industries reduce the cost of R&D, save time of pre-design process, and manegment uncontroble conditions in types of alternative fuel engines. Key Highlights: - The use of AVL FIRE software and coupled with detailed chemistry of reaction mechanism can provide accurate DFDI combustion regime condition. - ANN-RBF model can predict high accuracy engine conditions and explain the impact of variables by 3D curves (response-surface chart). - Combination CFD-ANN-TOPSIS method is a suitable procedure for extracting a comprehensive performance engine. Because it simultaneously shows the optimal level of factors and parameters I would like to extend my gratitude to my co-authors and everyone involved in this project for their invaluable support and collaboration. You can read the full article here: https://lnkd.in/daWkVpHd I look forward to your thoughts and discussions on this topic! #Dual_Fuel_Diesel_Engine #IC_Engine #Alternative_Fuel #Numerical_Investigation #CFD_simulation #ANN #TOPSIS #Sustainable_Energy

Here, we’ve gathered 8 real-world examples of how multiphysics simulation is being used to help the environment and make the world a more sustainable place. The stories featured here highlight the importance of simulation in the production of electric vehicles, energy-efficient ovens, biofuel, and more. #comsol #multiphysics #environment #sustainable #simulation #electricvehicles #electriccar #energyefficient #biofuel

Our paper "Investigation of the mechanism behind the surge in nitrogen dioxide emissions in engines transitioning from pure diesel operation to methanol/diesel dual-fuel operation" has been accepted by the journal Fuel Processing Technology (Impact Factor 7.2), and is scheduled to be published in Nov 2024. The accepted version is now available online at https://lnkd.in/eYiG4nh4

This summer, I finally found the time to revisit the beginning of my research career about high-pressure gas turbine combustion system design. This research aimed to provide emissions data for different aromatic fuel blends in a custom-built high-pressure combustor. Our target was to achieve stable combustion at 10 bar, a task that proved challenging due to initial flame instability and insufficient pressure. To overcome these challenges, we explored the impact of various nozzle sizes on combustion dynamics. We manufactured and tested a series of orifice nozzles, starting from 16mm and gradually reducing the diameter down to 2mm. Each reduction helped increase back pressure within the combustion chamber, but it was the 2mm nozzle that achieved the critical balance. This small nozzle significantly stabilized the combustion process, allowing us to maintain a consistent 10 bar pressure for the baseline tests. The flames that once escaped the chamber were replaced by a steady emission of white smoke, indicating more stable and efficient combustion. This study not only demonstrated the crucial role that nozzle design plays in controlling combustion pressure but also provided valuable data that has now been published. You can explore the full details of our findings here: https://lnkd.in/eYN5Y4PC As a personal research interest, I’m now looking to further this work by integrating advanced multi-phase CFD models with our existing data. This will help us gain deeper insights into the atomized fuel/air mixture dynamics, especially when paired with the novel baffle plate design that was integral to our project. #MDPIOpenAccess #Energies #UniversityofSheffield

🌍 Happy Earth Day! In this blog post, read about how engineers are using simulation to help the environment. This includes a look at the use of simulation in the production of electric vehicle components, energy-efficient ovens, biofuel, and more:

🔥💨 Hydrogen for industrial furnaces: no more polluting emissions! #hydrogen #industrial furnaces #decarbonisation 👨🔬 I am a hydrogen expert and this article [1] excites me. It describes a lab-scale industrial furnace that runs on hydrogen and emits much less polluting nitrogen (NOx) than traditional furnaces. 🌱 Hydrogen is a clean fuel and has enormous potential to decarbonise heavy industry, such as metal heat treatment. The big challenge is to control NOx emissions, which increase with high combustion temperatures. 🔥 The furnace in the study uses a micromix burner. It works by injecting fuel perpendicular to an air flow. This creates multiple small flames that reduce the high-temperature zone, preventing the formation of NOx. 💻 They have simulated the furnace by computer and the results are promising! At a power of 7.5 MW/m^2, they achieve a uniform heat distribution between 1100 and 1250 K. In addition, they compared the simulations with real thermal images of the flame and they match! This indicates that the computational model is accurate. 🏭 In short, this study paves the way for clean and efficient hydrogen-based industrial furnaces - a big step towards decarbonisation!

🚀🔋 Progress Update from the HELENA Project! 🔋🚀 As we progress in development of #solidstate #batteries using halide electrolytes that will revolutionize #electricAviation, the advanced #modeling and simulation work spearheaded by our partner IFP Energies nouvelles becomes more and more important. 🔬Their latest efforts have successfully defined interfaces between different scales of modeling. This strategic integration allows for a fluid interaction between all levels of our modeling tool chain, enhancing our capacity to innovate and predict outcomes with greater accuracy. 🧬𝗔𝘁𝗼𝗺𝗶𝘀𝘁𝗶𝗰 𝗠𝗼𝗱𝗲𝗹𝗶𝗻𝗴: At the atomic level, we're exploring materials to maximize efficiency and effectiveness. 🔋𝗠𝗶𝗰𝗿𝗼𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 𝗠𝗼𝗱𝗲𝗹𝗶𝗻𝗴: Focused on electrodes, this level is where we optimize for longevity and performance. 📊𝗠𝗮𝗰𝗿𝗼𝘀𝗰𝗮𝗹𝗲 𝗠𝗼𝗱𝗲𝗹𝗶𝗻𝗴: Scaling our insights to the cell level to ensure designs are both practical and powerful. 🛠️𝗦𝘆𝘀𝘁𝗲𝗺 𝗦𝗶𝗺𝘂𝗹𝗮𝘁𝗶𝗼𝗻: Extending our models to modules and battery packs, we're aiming for reliability and optimal performance in real-world applications. As we move forward, the collaborative and innovative spirit of the HELENA Project keeps us at the forefront of #sustainable technology. Stay connected for more updates as we advance towards a greener future!🌍✈️🔌