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 “"water heaters"”.
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Locomotive superheaters and feed water heaters
Thesis: B.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1922
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Solar water heaters in South Africa : limits and prospects
… this study was to investigate the use of solar water healers (SWH) in South Africa, and identify policies and measures that would promote their use. It has been found that conditions are appropriate for the development and use of SWH in South Africa. but the current market for this technology …
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The history and development of locomotive feed water heaters
Thesis: B.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1927
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A Novel Temperature Control Method for Electrode Type Ohmic Water Heaters
… rise model for an Ohmic type electrode water heater, that regulates temperature by adjusting the electrode separation. The type and amount of dissolved solids and temperature, determine the electrical conductivity of the water, which limits the instantaneous power of Ohmic type heaters. …
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Integration of gas instantaneous auxiliaries with renewable energy residential water heaters
Gas instantaneous water heaters are increasingly used as auxiliary energy sources for renewable energy domestic hot water systems. Currently the gas used by these systems is measured and modelled only very approximately. Accurately assessing consumption is important as gas can supply up to 50% of …
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Analysis of the Impact of Solar Thermal Water Heaters on the Electrical Distribution Load
In this research, the impact of solar thermal water heaters on the electric water heating load curve in a residential distribution circuit is analyzed with realistic hot water draw profiles. For this purpose, the electric and solar thermal water heater models are developed in MATLAB and validated …
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Investigating different mechanisms for promoting the use of solar water heaters in the Western Cape
… mechanisms for implementing a large-scale Solar Water Heating (SWH) programme, aimed at reducing electricity demand in households, and achieve the renewable energy targets for the Western Cape. The thesis provides an overview of the concepts and technologies around SWH, and their development and …
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Holistic Building Technology Selection for Sustainability: A Market Analysis and Multi-Attribute Decision Making Approach for Residential Water Heaters in U.S.
Water heating in the United States has the largest energy consumption of any residential related use. It uses more energy than all other home appliances combined. They have also been implicated as the source of waterborne disease outbreaks. With such high stakes, it is recommended that a Decision …
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A consumer assessment of household attitudes, awareness, drivers and likelihood of installing solar water heaters under a monthly payment scheme in Cape Town, South Africa
… reviews how incentive mechanisms impact solar water heater (SWH) technology adoption under both monthly payment scheme (MPS) and non-monthly payment scheme (non-MPS) conditions. The key research problem is to try understand why consumers1 have not installed SWHs under non-MPS conditions and …
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Do solar water heaters improve access to hot water and reduce electricity costs? : the complexities of implementing energy poverty interventions in South African Townships : a case study of Nyanga Township
… way of efficiently using the resource is solar water heating (swh), a natural process whereby hot water for domestic and/or industrial use is heated by the sun. In 2009, a national swh strategy was drafted by the Department of Energy, which specifies a target to install 1 million heaters in …
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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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Dose Determines if Soluble Copper is a Nutrient or an Antimicrobial for Legionella pneumophila in Premise Plumbing
… of copper on Legionella pneumophila in potable water plumbing systems is dependent on its dose and water chemistry. For instance, prior research demonstrated that the presence of aluminum hydroxide from anode rods in water heaters can bind copper and render high doses non-toxic. On this basis it …
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Load Frequency Control for Electric Water Heater Using DBSCAN Algorithm in real-time
… a novel control strategy for residential water heaters to provide demand-side frequency regulation while maintaining customer comfort. The approach employs Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm to dynamically group water heaters based on their …
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An investigation of carbon footprint reductions achievable in Cape Town social housing considering rebound effects
Various life cycle studies have shown that solar water heaters (SWHs) have short greenhouse gas emission payback periods. Thus, it is believed that replacing electric geysers with SWHs will reduce a household’s carbon footprint. It is also believed that living in a well-located area close to jobs, …
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Simulation of a solar water heating system
A computer simulation model of a domestic solar water heater, using natural circulation, is presented here. Tests were conducted on an experimental system, using a flat plate collector and solar storage tank, auxiliary to an electric geyser. Temperatures were recorded, solar radiation was measured …
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The development of a test rig to determine fouling factors of feedwater heaters
Feed water heaters are large shell and tube heat exchangers. They from part of the Rankine cycle used in coal fired power plants with the main purpose being the improvement of the overall cycle efficiency. Like most heat exchangers, feed water heaters suffer from fouling. Fouling is defined as “any …
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Green Improvements: A Consumer's Guide to Environmentally and Economically Responsible Home Repairs and Improvements for the North Central Texas Region
… specific energy-efficient household appliances- water heaters, air conditioning and heating systems, windows, dishwashers, refrigerators, clothes washers, and dryers. This serves two major purposes: to decrease the environmental impact of those products and to save consumers money over the …
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Balancing of intermittent renewable generation in smart grid
… the use of flow batteries and residential hot water heaters to balance wind power deviation from plan. The electricity supply-demand balancing problem becomes increasingly more difficult. A large portion of complexity to this problem comes from the fact that most renewable energy sources are …
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Legionella pneumophila in Domestic Hot Water Systems: Evaluation of Detection Methods and Environmental Factors Affecting Survival
… transmitted through inhalation or aspiration of water containing the bacterium and can be acquired within the home. Studies have found that 0-37% of domestic water heaters contain Legionella, making household hot water systems a potential route of exposure. The objective of this research was to …
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Numerical Investigations of Thermal-Fluid Phenomena Across Emerging Energy Systems
… capsules integrated into residential heat pump water heaters are performed to assess heat transfer enhancement, discharge behavior, and overall system performance.</p>
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