A5090238088- Advanced Combustion Engine Technologies
- Combustion and flame dynamics
- Spacecraft and Cryogenic Technologies
- Vehicle emissions and performance
- Hybrid Renewable Energy Systems
- Combustion and Detonation Processes
- Biodiesel Production and Applications
- Refrigeration and Air Conditioning Technologies
- Catalytic Processes in Materials Science
- Heat Transfer and Optimization
- Hydrogen Storage and Materials
- Electric and Hybrid Vehicle Technologies
- Superconducting Materials and Applications
- Adsorption and Cooling Systems
- Advanced Battery Technologies Research
- Rocket and propulsion systems research
- Nuclear and radioactivity studies
- Heat Transfer and Boiling Studies
- Real-time simulation and control systems
- Phase Change Materials Research
- Solar Thermal and Photovoltaic Systems
- Risk and Safety Analysis
- Laser Design and Applications
- Quantum, superfluid, helium dynamics
- Fuel Cells and Related Materials
Tecnológico Nacional de México
2020-2024
Lawrence Livermore National Laboratory
2011-2021
Technological Institute of Celaya
2021
University of California, San Diego
2007
Universidad de Guanajuato
1993-2006
University of California, Irvine
1999
Daido University
1994
Oregon State University
1989
Modelling the premixed charge compression ignition (PCCI) engine requires a balanced approach that captures both fluid motion as well low- and high-temperature fuel oxidation. A fully integrated computational dynamics (CFD) chemistry scheme (i.e. detailed chemical kinetics solved in every cell of CFD grid) would be ideal PCCI modelling approach, but is computationally very expensive. As result, assumptions are required order to develop tools efficient, yet maintain an acceptable degree...
This work investigates a control system for HCCI engines, where thermal energy from exhaust gas recirculation (EGR) and compression in the supercharger are either recycled or rejected as needed. engine operation is analyzed with detailed chemical kinetics code, HCT (Hydrodynamics, Chemistry Transport), that has been extensively modified application to engines. linked an optimizer determines operating conditions result maximum brake efficiency, while meeting restrictions of low NO{sub x} peak...
Homogeneous charge compression ignition (HCCI) is a new engine technology with fundamental differences over conventional engines. HCCI engines are intrinsically fuel flexible and can run on low-grade fuels as long the be heated to point of ignition. In particular, “wet ethanol:” ethanol-in-water mixtures high concentration water. Considering that much energy required for processing fermented ethanol spent in distillation dehydration, direct use wet considerably shifts balance favor ethanol....
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Homogenous-charge-compression-ignition (HCCI) engines have the benefit of high efficiency with low emissions <formula formulatype="inline"><tex Notation="TeX">$\hbox{NO}_{x}$</tex></formula> and particulates. These benefits are due to autoignition process dilute mixture fuel air during compression. However, because there is no direct-ignition trigger, control ignition inherently more difficult...
We have developed a methodology for predicting combustion and emissions in Homogeneous Charge Compression Ignition (HCCI) Engine. This combines detailed fluid mechanics code with chemical kinetics code. Instead of directly linking the two codes, which would require an extremely long computational time, consists first running to obtain temperature profiles as function time. These are then used input multi-zone The advantage this procedure is that small number zones (10) enough accurate...
Homogeneous charge compression ignition (HCCI) is a new combustion technology that may develop as an alternative to diesel engines with high efficiency and low NO x particulate matter emissions.This paper describes the HCCI research activities being currently pursued at Lawrence Livermore National Laboratory University of California Berkeley.Current include analysis well experimental work.On analysis, we have developed two powerful tools: single zone model multi-zone model.The has proven...
Three viable technologies for storing hydrogen fuel on cars are currently available: compressed gas, metal hydride adsorption, and cryogenic liquid. However, each of these has significant disadvantages: volume, weight, boiling losses, or energy to compress liquefy the hydrogen. Two alternative approaches analyzed in this paper: pressure vessels with capability a combination liquid storage. These alternatives compared baseline (LH2) storage terms vehicle range, dormancy, required processing,...
This paper presents our conceptual design for laser drivers used in Laser Inertial Fusion Energy (LIFE) power plants. Although we have only modest extensions of existing technology to ensure near-term feasibility, predicted performance meets or exceeds plant requirements: 2.2 MJ pulse energy produced by 384 beamlines at 16 Hz, with 18% wall-plug efficiency. High reliability and maintainability are achieved mounting components compact line-replaceable units that can be removed replaced...