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 51 for “"cold-climate"”.
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Improving cold climate performance of heat pumps using market-available systems
… greenhouse gas (GHG) emissions, but common mild climate systems suffer significant performance losses 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 …
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Dynamic Modeling and Model-Free Real-Time Optimization for Cold Climate Heat Pump Systems
… can be severely limited when operated in cold climate. Various modifications have been proposed for cold-climate operation of ASHP over the single-stage refrigeration cycle, such as vapor injection techniques and cascade configuration. However, there has been a lack of effective control …
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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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Cold-climate constructed wetland applications in Canada and Northern China and modeling applications in the Canadian Arctic using SubWet 2.0
… mechanisms of pollutant removal efficiency in cold-climate constructed wetlands (CWs) and investigates the benefits, standing and practicability of using these systems to treat wastewater in Canada and Northern China. Treatment efficiencies defined by the Canadian and Northern China experience …
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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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Impact of Ice Storage on Electrical Energy Consumption in Large and Medium-sized Office Buildings in Different Climate Zones
… and medium-sized office buildings in diverse climate zones. The research also quantifies the peak energy savings as a result of ice storage systems. To accomplish the thesis objectives the Demand Response Quick Assessment Tool (DRQAT) has been used to model and simulate large and medium-sized …
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Planar Multilayer Thin Film Coatings for Passive Winter Thermal Management
… gas emission, which adversely affects the global climate. The high cost of fossil fuel also causes widespread energy poverty. Adoption of passive heating schemes which utilize solar energy for indoor heating can greatly reduce the energy requirement of buildings in the cold climate. Currently …
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Alaskan Eskimo and Polynesian Island Population Skeletal Anatomy: The "Pacific Paradox" Revisited Through Surface Area to Body Mass Comparisons
… comparisons between this Pacific population and cold climate groups has received little attention. The methods employed are those preformed by Ruff (1994), Ruff et al (1991, 2004, 2005) and Houghton (1996) to create the most accurate determination of overall body form in both populations. Eight …
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Alaskan Eskimo and Polynesian Island Population Skeletal Anatomy: The "Pacific Paradox" Revisited Through Surface Area to Body Mass Comparisons
… comparisons between this Pacific population and cold climate groups has received little attention. The methods employed are those preformed by Ruff (1994), Ruff et al (1991, 2004, 2005) and Houghton (1996) to create the most accurate determination of overall body form in both populations. Eight …
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Evaluating Vegetation, Root, and Media Characteristics of a Bioretention Installation and their Influence on Stormwater Retention
… research facility were investigated in an arid, cold-climate region. Stormwater retention ranged from 0% to 67%, was highest in coarser media and demonstrated significant interactive effects of media and vegetation. Shrub dominated beds exhibited the highest root length density, however no clear …
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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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Development of an Occupant-centric Control Algorithm for Mixed-Mode Ventilation Buildings to Regulate Window Operations
… to identical buildings with fixed windows in a cold climate.
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Evaluating energy consumption within Icelandic greenhouses : towards sustainable and efficient vegetable production
… due to Iceland's limited solar irradiation and cold climate. This paper looks at options for increased efficiency in greenhouses to determine how local food production could increase without the increasing electricity demand. Additionally, various calculations were made to determine how much …
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Characterization of low-temperature properties of plant-produced rap mixtures in the Northeast
… material in the performance of pavements under cold climate conditions. It is comprised of two main sections that were incorporated into the body of this dissertation as Part I and Part II. In Part I a reduced testing framework for analysis of HMA mixes was proposed to replace the IDT creep …
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Meeting A Community’s Emissions Reduction Targets Using Urban Building Energy Modeling
… ENERGY STAR certified home standards, installing cold climate heat pumps to displace fossil-fuel based heating, and deploying photovoltaics over an area equivalent to 50% of all rooftops. To aid in the final step of the process, implementation, the city-wide strategies were broken down into …
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EASTERN EQUATORIAL PACIFIC PRODUCTIVITY VIA TWO GEOCHEMICAL PROXIES
… productivity variations observed over warm and cold climate periods. In order to determine this, additional oceanic paleoproductivity data collection is necessary to estimate the ocean’s feedback in response to a dynamic climate. The eastern equatorial Pacific (EEP) is an ideal site for …
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Design and Lab Implementation of an Air Source Transcritical CO2 Heat Pump
… (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 instrumented to collect temperature, pressure, and …
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Climate system response to perturbations : role of ocean and sea ice
… radiative budget, the global ocean can buffer climate change, while sea ice may amplify its effects via a positive albedo feedback. It is therefore of interest to consider the role of the ocean in the climate's response to changes in external forcing, such as volcanic eruptions, Snowball Earth …
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Implicit ordering : a tribal center to connect land, community and creativity
… design were issues of cultural usage of space, cold climate design imperatives, its selection, and programming considerations. Several considerations in the design of the center itself were site specific: a limited building footprint, primacy of view within the center versus climactic …
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