The spatial temperature distribution in an enclosed, screw base, 13 W compact fluorescent retrofit fixture and the surrounding environment was investigated for a typical recessed fixture application. The minimum lamp wall temperature and... more
The spatial temperature distribution in an enclosed, screw base, 13 W compact fluorescent retrofit fixture and the surrounding environment was investigated for a typical recessed fixture application. The minimum lamp wall temperature and light output were measured over time with and without a thermal bridging system. The experimental data were used to design an efficient thermal bridge and to evaluate the performance of the bridge, which was found to increase the relative light output of the fixture of about 20%
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Research Interests: Mechanical Engineering, Chemical Engineering, Raman Spectroscopy, Nanoparticles, Surface Enhanced Raman Spectroscopy, and 10 moreAutomotive Engineering, Higher Order Thinking, First-Order Logic, Second Order, Size Distribution, First Order Logic, Three Dimensional, Amorphous carbon, Raman Spectra, and Particle Size Distribution
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This work describes the use of well-controlled laboratory flames to produce aerosols of organic carbon (OC) as model particles representative of the OC fraction of combustion-generated particulate matter emissions in fresh exhausts.... more
This work describes the use of well-controlled laboratory flames to produce aerosols of organic carbon (OC) as model particles representative of the OC fraction of combustion-generated particulate matter emissions in fresh exhausts. Water-particle interactions are explored in two specific cases. In the first case, particles are exposed to saturated environments and come into direct contact with liquid water by bubbling flame samples through a column of water. This case is representative of particle-liquid interactions relevant to wet removal routes by particle interception by rain or fog droplets or in biological systems covered with biological fluids composed mostly of water. In the second case, the particles are exposed to sub-saturated vapors with H(2)O concentrations representative of cloud-forming atmospheres. The particles' capacity to serve as atmospheric cloud condensation nuclei (CCN) by rapid growth to droplets was measured and compared to NaCl particles, which are highly soluble particles with well known activation diameters. The results show measureable interactions with water in highly saturated conditions. However, in sub-saturated environments, no growth by water condensation was observed, and fresh emissions of OC nanoparticles are not likely to act as CCN in atmospherically relevant humidity.
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We report the size and electrical charge distributions of incipient nanoparticles generated in atmospheric pressure hydrocarbon/air premixed flames in conditions prior to the onset of soot particles. The particle size and charge... more
We report the size and electrical charge distributions of incipient nanoparticles generated in atmospheric pressure hydrocarbon/air premixed flames in conditions prior to the onset of soot particles. The particle size and charge distributions are measured by Differential Mobility Analysis (DMA) and compared to theoretical charge distributions predicted for flame conditions. The results show that the charge distribution attained in flames