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 39 for “"Cold climates"”.
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Sterile neutrinos in cold climates
Measurements of neutrino oscillations at short baselines contain an intriguing set of experimental anomalies that may be suggestive of new physics such as the existence of sterile neutrinos. This three-part thesis presents research directed towards understanding these anomalies and searching for …
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Design of a residential air source heat pump for extremely cold climates
Air source heat pumps are energy efficient systems suitable for space heating applications, however, their performance drastically degrades in low ambient temperatures. An innovative design is proposed in this thesis that can switch operating modes to allow efficient heating operation in an ambient …
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Aligned selection in cold climates breaks the rules of trade-offs in adaptation
… ability, subordinate competitors should occupy climates which are more diverged from their genus’ average climate (H1). Conversely, if selection from climatic challenge and competition align on the same favoured traits, then dominant competitors should occupy more divergent climates (H2). To …
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Design, Testing And Controls For Air Source Heat Pump System In Cold Climates Using Natural & Conventional Refrigerants
… heating applications in northeastern U.S winter climates by replacing the natural gas based heating system as part of the global & local efforts for decarbonizing the buildings. A dedicated testing facility was built inside the laboratory which could produce outdoor winter conditions to test the …
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A novel heat pump cycle to enable the flexible storage and deployment of harvested waste heat in cold climates
The increasing desire for renewable energy and decarbonization demands a transformation in the way we manage thermal and electrical energy in residential HVAC systems. New regulations and an increase in renewable energy participation in our power systems will increasingly incentivize fully electric …
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Oil spills in cold climates with special reference to the transportation and exploration of hydrocarbons in the Kara Sea
Oil spilled in ice infested waters have frequently been under investigation through the last twenty years. This has been induced by the prospects of large oil reserves offshore both in the American and Russian Arctic. Two oil spill scenarios considering the oil exploration in the Kara Sea have been …
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Modelling and Experimental Characterization of Solar-Assisted Ground Source Heat Pump Systems with and without Thermal Energy Storage for Cold Climates
… environmentally friendly solution. However, in cold climates, like Canada, heating loads are significantly greater than cooling loads, which makes the amount of thermal energy extracted from the ground each year greater than the heat injected back. This can potentially cause ground temperature …
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The power-gas demand impacts and regulatory implications for the future of gas systems under the electrification of space heating in cold climates
… England region, the high demand for heating in cold climates elicits concerns about energy demand impacts. Furthermore, there is concern about what electrification and the broader call for decarbonization might imply for gas distribution systems, which will face declining usage and most likely …
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Improving cold climate performance of heat pumps using market-available systems
… at the low outdoor temperatures experienced in cold climates. Improved heat pumps for cold climates already exist, but they are more expensive and their adoption has been relatively low. An analysis was conducted to assess the status of market-available cold climate heat pump technologies and …
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Stress-tolerant bioremediation strategy for cold-climate sites: laboratory, modelling, and field studies for extending petroleum hydrocarbon biodegradation to seasonally freezing and frozen contaminated soil phases
… of petroleum hydrocarbon-contaminated soils in cold climates is challenging due to low temperatures, limited field accessibility, and low microbial activity. Conventional bioremediation practices have focused on short summers in cold climates, but the feasibility of extending hydrocarbon …
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Evaluation of the Impacts of De-Icing Salts on the Performance of Bioretention Media in Retaining Phosphorus From Urban Stormwater
… in bioretention systems is complicated in cold climate regions due to factors such as inputs of road de-icing salts. This study evaluates the impact of prolonged and periodic salt inputs on P retention by conducting column experiments using three different bioretention media with and …
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Experimental investigation of building envelope and air source heat pumps in Canadian cold climate
… is partly due to the low efficiency of ASHPs in cold climates. This study investigates how extreme temperatures, wind, and solar conditions affect building envelope performance and the efficiency of commercial ASHPs. Experiments were conducted in controlled conditions using the full-scale …
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Use of phase angle in lieu of critical crack tip opening displacement for asphalt binder specification
The road pavement sector in countries with cold climates such as Canada currently faces a significant problem with the construction of asphalts demonstrating less than optimal long-term performance. Therefore, attention should be paid to the asphalt binder acceptance criteria used. This study …
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An acoustic emission-based test to evaluate low temperature behavior of asphalt materials
… cracking in asphalt pavements located in cold climates is a major cause of pavement deterioration. Accurate evaluation of low temperature cracking behavior of asphalt materials is necessary in order to design pavements that are resistant to thermally induced cracking. Detrimental effects …
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EFFECTS OF PLANT GROWTH-PROMOTING MICROORGANISMS ON MICROBIAL COMMUNITY DYNAMICS AND PLANT GROWTH RESPONSES OF AEROPONICALLY CULTIVATED SPINACH
… conventional farming techniques year-round in cold climates increases the need for access to quality, locally sourced, and affordable foods year-round. Shifting from a soil-based system to aeroponics can increase yields, as aeroponic systems are not weather-reliant and can operate year-round. …
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The thermal performance of fixed and variable selective transmitters in commercial architecture
… thermal resistance, proved to be significant in cold climates.
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Performance Assessment of Alternative Composite Earth Wall Panels
… to almost any climate including rainforests and cold climates. As an alternative to high-embodied energy materials used for enclosure systems, compacted earth-based enclosure systems may be a viable option, particularly if developed and applied as a pre-manufactured modular system. This study …
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Combating urban heat islands : assessing the potential of open-loop geothermal heat pump systems in Canada
… systems for urban cooling and UHI mitigation in cold climates.
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