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 “"Plastic Pipes"”.
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Analysis and design of an in-pipe system for water leak detection
… of pressure, corrosion, cracks, defects in pipes or lack of maintenance. The problem of leak becomes even more serious when it is concerned with the vital supply of fresh water to the community. In addition to waste of resources, contaminants may infiltrate into the water supply. The …
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Off peak cooling using an ice storage system
… coolant circulates through a series of coiled pipes inside a water filled storage tank. As heat is drawn from the water, ice forms around the pipe heat exchanger. With a cool ant temperature of 20°F the ice cylinder will form out to a diameter of 3.4" in 10 hours. Optimum pipe spacing is 3.5" …
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Accumulation of Lead by Biofilms in Drinking Water Distribution Systems
… systems, even after the removal of lead pipes. This study used a simulated water distribution system containing a lead source pipe and various pipe materials with periodic flow and stagnation conditions of a typical household to create, characterize, and determine lead accumulation …
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Lifetime Estimation for Ductile Failure in Semicrystalline Polymer Pipes
… lifetime estimates of semi-crystalline plastic pipes which is sensitive to changes in structure, orientation, and morphology introduced by processing conditions. To accomplish this task, high-density polyethylene (HDPE) is chosen as the exemplary base material. As a new accelerated test …
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Factors influencing phosphorus losses in agroecosystems dominated by tile drainage
… runoff and artificial subsurface (perforated plastic pipes called tiles) drainage affecting the quality of receiving aquatic ecosystems. However, controls of phosphorus losses at the sub-field and watershed scales are not fully understood. The overall goal of this study is to determine the …
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Greenhouse solar drying and thin layer drying of fresh Kapenta(Stolothrissa Tanganicae)
… wooden frame was fabricated and 20 mm diameter plastic pipes clamped on opposite ends to form the Greenhouse frame. Pieces of rock were spread within the base of the wooden frame and covered with black polythene. The Greenhouse plastic was fitted onto the entire Greenhouse framework. Kapenta was …
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Greenhouse solar drying and thin layer drying of fresh Kapenta(Stolothrissa Tanganicae)
… wooden frame was fabricated and 20 mm diameter plastic pipes clamped on opposite ends to form the Greenhouse frame. Pieces of rock were spread within the base of the wooden frame and covered with black polythene. The Greenhouse plastic was fitted onto the entire Greenhouse framework. Kapenta was …
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Two Issues in Premise Plumbing: Contamination Intrusion at Service Line and Choosing Alternative Plumbing Material
… of contaminants into the drinking water pipes from the pipe's exterior environment due to low pressure events associated with water hammer phenomenon. These contaminants enter into the drinking water as the home plumbing system is a passive recipient from the water main. While the major …
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Impact of Premise Plumbing Conditions, Materials, Corrosion Control, Temperature, and Water Heater System Design on the Growth of Opportunistic Pathogens in Drinking Water
… The effects of metallic (copper, iron) and plastic pipe materials on opportunistic pathogens and Legionella include their effect on nutrient availability, disinfectant levels, and the composition of the broader microbiome. Design, configuration, and operation are also examined in terms of …
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Development Of A Performance Analysis Framework For Water Pipeline Infrastructure Using Systems Understanding
The fundamental purpose of drinking water distribution systems is to provide safe drinking water at sufficient volumes and optimal pressure with the lowest lifecycle costs from the source (treatment plants, raw water source) to the customers (residences, industries). Most of the distribution …