Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 44 for “"gas analyzer"”.
-
MEMS micropump for a Micro Gas Analyzer
… micro-vacuum pump designed for use in a portable gas analysis system. It is designed to be pneumatically-driven and as such does not have self-contained actuation (the focus of future work). This research was carried out through a series of modeling, design, fabrication, and experimental testing …
-
Chip-scale quadrupole mass filters for a Micro-Gas Analyzer
… smaller, faster, better, and cheaper. The Micro-Gas Analyzer (MGA) project attempts to leverage MEMS capabilities to create a low-cost, high-performance, portable mass spectrometer. Batch-fabrication of various components for the MGA has been demonstrated to date, but the mass filter component …
-
Characterization of nano-scaled metal-hydrides confined in nano-porous carbon frameworks
… and lower volume than liquid H₂ or compressed gas. Thermodynamic properties of metal hydrides differ between bulk and nano-sized particles. Many metal hydrides with useful volumetric and gravimetric capacities have high decomposition temperatures, but when placed in nano-sized frameworks (or …
-
The Effect of Pulp Mill Effluents on the Carbon Dioxide Evolution of Three East Texas Soils
… evolution was then measured with an infrared gas analyzer to determine the effect of the effluents on the respiration of soil microorganisms. The relationship between effluent treatments was not statistically significant, though detrimental effects were observed in the heavier soil. Irrigation …
-
Quality assurance project plan for a ruminant emission measurement system
… to atmospheric accumulation of greenhouses gases. A Ruminant Emission Measurement System (REMS) was designed, constructed and tested at the Metabolism Unit of the Beef Cattle and Sheep Field Laboratory at the University of Illinois at Urbana-Champaign to quantify these emission rates for …
-
Carbon Dioxide and Hydrogen Sulfide Emission Factors Applicable to Wastewater Wet Wells
… causes potential problems associated with gases which include ammonia, carbon dioxide, carbon monoxide, hydrogen sulfide and methane, in regard to odor nuisance, irritation, toxicity, and microbially induced corrosion. The extent of these problems depends on the emission rates of gases in …
-
Computer data acquisition, control, and analysis for the University of Tennessee at Chattanooga's internal combustion engine labratory
… system to monitor the temperature of the exhaust gases at different locations and the coolants entering and leaving the dynamometer and the radiator.Those thermocouples have an output signal of O - 55 mv.The TESCOM gas analyzer system measures the concentrations of the different gases present in …
-
Assessment of exhaust emissions from imported used Motor Vehicles
… Degree by the University of Zambia.An MGT 5 gas analyzer was used to conduct tail pipe emission testing from vehicles imported and presented for registration at Mimosa Motor Vehicle Inspection Centre in Lusaka. A total of 200 out of 116,007 imported used motor vehicles were assessed using an …
-
Database and Application Programming Interface Development for Rotational Spectroscopy
The Species-agnostic Automated Gas Analyzer (SAAGA) project aims to automate the detection and characterization of chemical compounds in a complex chemical mixture in the gas phase through experimental rotational spectroscopy and computational tools. A database of spectroscopic data serves as the …
-
A study of the high speed diesel engine exhaust with respect to gas composition and smoke density
A study of exhaust gas composition at various engine speeds, loads, and cooling water temperatures was made on an International Harvester UD-6 Diesel Engine. Simultaneously, smoke density was measured with a smokemeter, the principle of which was based on the obstruction of light. Exhaust gases …
-
Specificità dei test cardio-polmonari nel nuoto: comparazione tra il nuoto trattenuto e test aspecifici di laboratorio
… HRmax, and AT were measured by a portable gas analyzer. To permit expired gases collection during SW testing, the device was connected to a modified snorkel system. During the SW the athletes showed a higher VO2max compared to the CY and the AC tests. There was no significant difference in …
-
Field ionization from carbon nanofibers
The Micro Gas Analyzer project aims to develop power-efficient, high resolution, high sensitivity, portable and real-time gas sensors. We developed a field ionizer array based on gated CNTs. Arrays of CNTs are used because of their small tip radii and high aspect ratio which yields high electric …
-
Sweet sorghum fermentables as influenced by cultivar and planting and harvest dates
… sorghum tissue was measured with an infrared gas analyzer before and after freezing to quantify loss of fermentables associated with delayed harvests. Vital stains were used before and after freezing to estimate cell mortality. No significant difference was found in the level of fermentables …
-
Ionic Liquids Tethered to Activated Carbon for Capture of Airborne Toxins
… found to be good absorbents for a variety of gaseous species. The absorption selectivity and capacity can be tuned by changing the anion-cation pair. By tethering ILs to AC, the beneficial properties of gas absorption from ILs can be integrated into a solid system. The simulant …
-
Design and implementation of Carbon Monoxide and Oxygen emissions measurement in swirl-stabilized oxy-fuel combustion
Oxy-fuel combustion in natural gas power generation is a technology of growing interest as it provides the most efficient means of carbon capture. Since all the emissions from these power plants are sequestered, there are stringent regulations on the proportions of oxidizable contents in the flue …
-
Combustion emissions from conventional boiler firing coal and tire derived fuel
… CO emissions were determined with an ENERAC 2000 gas analyzer. Supelco XAD-2 resin was used in the modified method 5 sampling train to adsorb nonpolar, vapor phase hydrocarbons. The XAD-2 resin was extracted and the wash concentrated before High Performance Liquid Chromatography (HPLC) was used to …
-
An Optical Analysis of the Blowoff Behavior for Bluff Body-Stabilized Flames in Vitiated Flow
… using a PIV system and a continuous emissions gas analyzer, respectively. </p> <p>High-speed videos of these flames undergoing blowoff were taken to serve as the primary data source for analysis. To examine the effects of Bénard-von Kármán vortex instabilities and local strain-induced …
-
Comparing Calorie Expenditure and Rating of Perceived Exertion between the Curve and a Motorized Treadmill
… rate monitor and the K4 b<sup>2</sup> metabolic gas analyzer (K4). The order of tests was randomly assigned. The warm up consisted of walking at 3 MPH until steady state heart rate was reached which took approximately three minutes. The actual test consisted of walking at 3 MPH for 10 minutes on …
-
Applications of a hand-held optoelectronic nose: security screening, medical diagnosis and food inspection
… convenient and effective method for liquid and gas analysis of relevant analytes where the specificity derives from the pattern of response from cross-reactive and chemoresponsive sensor sets. Colorimetric sensor arrays have seen successful applications in differentiating among diverse families …
-
Effects of multi-circular jet plates on the spray and flame characteristics of internal mixing air-assisted atomizer
… temperature are also recorded using an emission gas analyzer and K-type thermocouples respectively. Then the computational work is conducted by using ANSYS Fluent to visualize the impact of plate geometry on the internal fluid flow and spray structure. Further analysis using both experiments and …
Page 1 of 3