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 11 of 11 for “"hot water system"”.
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Basic relation for the recovery of oil by steam application to an oil and hot water system
A system of equations describing the general behavior of a "steam flood" or oil displacement by means of steam in a homogeneous, one-dimensional non-capillary model formation is here derived. An aspect of the steam flood is the displacement of oil by hot water after the steam has condensed. An …
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Techno-economic comparison and environmental impact assessment of a hybrid photovoltaic thermal solar system and a thermosiphon solar thermal hot water system with electric back up element, under Windhoek, Namibian conditions
… and economic evaluation of thermosiphon solar water heater (TS-SWH) and hybrid photovoltaic thermal (PVT) water heaters under Namibian conditions is limiting options available to decision makers on locally economic and opportune systems. This study compares the technical, economic aspects, and …
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A study of the relationship between viability, culturability and virulence in environmental populations of Legionella pneumophila
… phenomenon in Legionella pneumophila, a model hot water system was constructed to serve as a source of planktonic and biofilm cells. Both planktonic and biofilm L. pneumophila existed primarily as nonculturable cells. A portion of these nonculturable cells were shown to be viable using the …
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Oscillating heat pipes : study of their oscillating motion using neutron imaging and application
… using neutron imaging in two OHPs, one using water as the working fluid and one using acetone. The resulting data were compared with external temperature data to investigate the workings of the OHPs and also compared to a numerical model. The results show that higher heat input causes more …
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Preliminary Investigation into Solar Thermal Combi-system Performance
Solar thermal combi-systems use solar energy to provide thermal energy for space heating and domestic hot water. These systems come in many different designs and configurations, and their performance is dependent on many different factors such as location, solar collector type and orientation, and …
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The Development and Application of a Simplified Thermal Performance Equation for a Sheet-and-Tube Photovoltaic Thermal Combi-Panel
… is the combination of solar thermal and photovoltaics - two mature and widely understood technologies. Combining the two technologies complicates existing standardized rating procedures and performance modeling methods. Currently a standardized performance test method does not exist for …
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Sustainability of Residential Hot Water Infrastructure: Public Health, Environmental Impacts, and Consumer Drivers
Residential water heating is linked to the primary source of waterborne disease outbreaks in the United States, and accounts for greater energy demand than the combined water/wastewater utility sector. To date, there has been little research that can guide decision-making with regards to water …
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Effects of Scale Reduction Technologies and Chemical Inhibitors on Calcium Precipitation in Premise Plumbing Systems
Precipitation of solids in plumbing systems (i.e., scaling) is a major problem in both traditional tank (electric and gas) and tank-less building hot water systems. Scaling can cause energy inefficiencies, flow reduction, pressure loss, and erosion corrosion damage. Consumers are also concerned …
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Interplay of Water Chemistry and Entrained Particulates in Erosion Corrosion of Copper and Nonleaded Alloys in Potable Water Systems
… corrosion of plumbing materials in domestic water systems is a complex phenomenon driven by water quality, hydrodynamic and electrochemical factors. Erosion corrosion accounts for over a third of copper hot water system failures in the U.S., hundreds of millions in damage, and may be expected …
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El sector residencial riojano y la rehabilitación energética del sector residencial rural riojano
… Available energy resources, specifically solar photovoltaic energy and biomass, are evaluated, and their utilization for the residential sector is studied. Furthermore, regarding the residential sector, the number of dwellings, the area of dwellings, the area per dwelling, the number of floors …
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Investigation of biofilms in copper tube corrosion and the survival of <i>Legionella pneumophila</i> on alternative plumbing materials
… was found to occur predominantly in soft water areas but mainly in hot water systems maintained below 50°C. When monitoring the hot water system at a particular site the water temperature was found to decrease overnight with a corresponding decrease in the dissolved oxygen concentration …