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.
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Showing 1 to 20 of 42 for “"Global Warming Potential (gwp)"”.
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A Life Cycle Assessment of Three Department of Defense Airfield Paving Projects
… military installations, quantifying associated Global Warming Potential (GWP) contributions from materials, transportation, and construction (life cycle stages A1 through A5). LCA results were calculated using the openLCA software with input data from pavement material Environmental Product …
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Reducing the global footprint in an anesthesia department : a quality improvement project
… agents are potent greenhouse gases with high global warming potential (GWP), long atmospheric lifespans, and significant contributions to perioperative emissions. Despite scavenging systems, a significant portion of these agents are released into the environment, with Desflurane having the …
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Carbon intensive but decarbonising quickly? Retrospective and prospective life cycle assessments of South African pome fruit
… products with a high carbon footprint through potential trade barriers, border tariffs and consumer lobbying. The objective of this research is to determine whether South African pome fruit has a higher global warming potential (GWP) per kg fruit compared to pome fruit cultivated and packaged …
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Design and Lab Implementation of an Air Source Transcritical CO2 Heat Pump
… was developed to evaluate the performance of low-global-warming-potential (GWP) refrigerants for cold climate applications. A custom climate chamber was also constructed to simulate winter weather conditions typical of the northeastern United States. Both the TCHP and the chamber were fully …
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Life Cycle Optimization of a Zero Carbon Building for CO2e, Energy, and Cost Using Stochastic Controls for an Energy System Integrating a Heat Pump, Solar Air Wall, PV, and a Smart Grid-integrated Thermal Storage (SGTS) Hydronic Battery
… subarctic Edmonton, Alberta, Canada. LCO is for global warming potential (GWP), energy, cost, and renewable friendliness. A life cycle assessment (LCA) based methodology (carbon return on investment – CROI) is proposed for design and retrofit decisions on the basis of GWP and cost. Sustainable …
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Sustainable design of hydrocarbon refrigerants applied to the hermetic compressor
… such as R134a which has a zero ozone depletion potential (ODP). The use of HFCs has also come under scrutiny as they have high global warming potential (GWP) and inferior thermodynamic and lubricating properties and have been replaced by hydrocarbon (HC) refrigerants such as R600a in much of the …
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Recycling of glass fibre reinforced polymer composite wind turbine blades in South Africa
… blades as the source of this scrap GFRP. At a global scale, five main categories of GFRP recycling methods are identified: mechanical, thermal, chemical, high-voltage fragmentation and co-processing. These recycling methods are investigated and the analytic hierarchy process (AHP) is employed …
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Correlation Analyses among Soil, Plant, and Environmental Variables and Greenhouse Gas Emissions from Furrow-irrigated Rice on a Silt-loam Soil
… temperature, and oxidation-reduction (redox) potential. No research has been conducted to relate greenhouse gas (GHG) production to soil and plant properties or environmental factors under furrow-irrigated rice. The objective of this field study was to evaluate correlations between methane …
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Development of a pavement life cycle assessment tool utilizing regional data and introducing an asphalt binder model
… that the variation in energy consumption and global warming potential (GWP) from binder production can be as high as 24% and 41%, respectively. To validate the LCA framework, a case study regarding a flexible pavement is analyzed for a 60-year period that covers all five phases of the life …
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Oil retention and pressure drop of R1234yf and R134a with POE ISO 32 in suction lines
… the compressor due to which it has the highest potential for oil retention. R1234yf is a new alternative refrigerant of low global warming potential (GWP) which has been developed for automobile air conditioners as a drop-in replacement for R134a in order to meet European Union’s low GWP …
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Multi-Material Continuum Topology Optimization for Embodied Carbon Objectives
… the structural weight, and as such, minimize the global warming potential (GWP). This research provides an exploration of bi-material optimization problems that minimize GWP as well as compliance for a series of representative models. Two materials are considered; one with a stiff, high embodied …
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Characterisation and analysis of a corona-stabilised switch filled with environmentally-friendly gas mixtures
… N2, used as a buffer gas. Thus, decreasing the global warming potential (GWP) of the switching medium from 23900 in SF6 to 6 in HFO-1234ze. The performance of the gas was measured in a specific corona-stabilised switch geometry, characterising triggering range and delay time experimentally, and …
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Climate impact metrics for energy technology evaluation
The climate change mitigation potential of energy technologies depends on how their lifecycle greenhouse gas emissions compare to global climate stabilization goals. Current methods for comparing technologies, which assess impacts over an arbitrary, fixed time horizon, do not acknowledge the …
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Agricultural Waste Utilization: Life Cycle Assessment for Selecting Carbon-Management Best Practices on a Global Scale
… for only a small share of the total life cycle global warming potential (GWP) in the electricity generation scenarios, ranging from 0.66% (via ships) to 16.40% (via trucks) for every 1000 km traveled. This makes long-distance residue transport viable. The findings of this study underscore the …
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Comparisons of N2O and CH4 fluxes as affected by land use systems and climate in small catchments in Korea
In the course of global and climate change humankind has to face extreme weather events with increased intensity and frequency and it has to deal with feeding an increasing number of people which is accompanied by shortage of resources such as water. Since half of humankind directly depends on …
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Effect Of Field Pea And Multicarbohydrase Enzymes Inclusion On Growth, Diet Digestibility, And Greenhouse Gas Emissions Of Finishing Pigs And Their Manure
… and pig housing found a 13% reduction in global warming potential (GWP). The GWP from pig housing increased with 40% inclusion of field pea, but multicarbohydrase enzymes inclusion showed a decrease. The inclusion of up to 40% field pea and multicarbohydrase enzymes to the diet of …
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Tribology of engineering and coated materials in the presence of environmentally friendly refrigerant
… due to environmental issues related to high global warming potential (GWP). Specifically, developing a system-compatible alternative refrigerant is of prime concern in order to reduce costs associated with design modifications. Among the candidate refrigerants, newly developed HFO-1234yf is …
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Investigation of oil retention and pressure drop in suction lines using R1234yf, R134a and R410A with POE ISO 100
… drop in suction lines using R1234yf, the low Global Warming Potential (GWP) refrigerant which was developed as a consequence of the European Union’s Mobile Air-Conditioning Directive. Tests were conducted in 10.2 mm internal diameter horizontal and vertical suction lines that were about 2 m …
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Experimental investigation and mathematical modelling of dynamic equilibrium of novel thermo-fluids for renewable technology applications
… problems. Solar thermal energy has a potential to diminish the dependency on fossil fuels and reduce CO2 emissions in which solar radiation is converted to heat via a thermal fluid for power and heat generation. Medium and high-temperature solar thermal systems where concentrated …
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Novel Earth Abundant Catalytic Materials for Abatement of Atmospheric Methane Sources, and Evaluation of Agricultural Deployment Environments
Annual global average temperatures in the past year have already exceeded the international target limit of 1.5°C, and the window to prevent that rise from extending is rapidly closing. The high global warming potential (GWP) and short atmospheric residence time (half-life of around 12 years) of …
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