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The Energy Star standard is useful for comparing dryer models but gives much less information about performance once installed in a residence. All energy efficiency (EE) efforts need to consider the impact on the drying process and the textiles being dried. The length and efficacy of the drying process is affected by the temperature and humidity of the dryer's environment.
Accurate prediction of a buildings electricity load is crucial to respond to Demand Response events with an assessable load change. However, previous work on load prediction lacks to consider a wider set of possible data sources. In this paper we study different data scenarios to map the influence of the different data parameters. We also look at the temporal aspect of predicting by looking at the...
An overview of solar energy technology is discussed briefly. To increase the energy efficiency of a solar array, maximum power output is desired. There are three major approaches for maximizing power extraction from a solar array. They are sun tracking, maximum power point (MPP) tracking or a combination of both. The sun-tracking design can increase energy yield up to 50% over the year compared to...
In the past few years energy management became increasing important. Not only the trend toward clean energy sources triggered a process of rethinking in the minds of society but also pushed the politics to create incentives for companies in order to make them reduce their carbon footprint. Efficient use of resources has become a fundamental part of present-day economic, social and political decision...
Improving at scale the energy performance of buildings requires that applications are portable among buildings (i.e. the same application in two different buildings). One challenge in enabling portable applications is metadata about building instrumentation. The problem is that there are multiple ways to annotate sensor and actuation points. This makes it difficult to create intuitive queries for...
this paper assesses some of the worldwide regulations and standards similar to, or referred to as Restriction on the use of Hazardous Substances, or RoHS. An overview of RoHS, its history, evolution and worldwide expansion is given. Many jurisdictions outside of the European Union (EU) have similar regulations as the EU RoHS Directive. In 2016, there are over 70 jurisdictions, including countries,...
Solar photovoltaic systems are becoming increasingly popular as industries try to decrease their carbon footprint. This paper presents a generic optimization framework and examines a case study where a flat rooftop located in Edmonton, Alberta is investigated for the installation of a photovoltaic array. The objectives of this study are to maximize power generation while minimizing the system cost...
The convection based soldering technologies in electronics assembly consume massive electrical energy. The recent advancements in soldering technologies consume comparatively higher resources and need to be optimized for resource efficient production which is also the motivation for the present work. This paper has an energy consumption reduction perspective by considering a detailed analysis of operation...
Onboard passive components are very popular in electrical and electronics manufacturing technologies. Methods of printed circuit board manufacturing, used for making passive onboard devices such as inductors, have been unchanged for decades. Current PCB technology uses subtractive processes which involve acids and solvents which produce significant toxic waste in creating the metallic layers. In this...
As finite energy resources are rapidly depleting, the world desperately needs to rely on more renewable energy resources, such as solar energy. The research described hereafter designs and analyzes the use of solar cells in public places, in the form of a solar table, to assess whether their use and energy output justifies their cost for use in public environments. The ultimate goal of this research...
Decentralization of vertically integrated electrical power systems can bring economic, reliability and environmental benefits to society. Microgrids are a step to a more hybrid, less centralized power industry. A key objection from traditional electric utilities to distributed renewable energy is the variation injected to the power grid from variables sources such as the sun. A significant milestone...
In this work we compared three heat transfer fluids (HTFs) for parabolic trough solar collectors (PTCs), namely, Syltherm 800, Therminol VP-1, and Dowtherm Q. For the assessment, we adopted and simplified a previously developed mathematical model of a parabolic trough solar receiver comprising an outer cover, annular space, abosrber, and heat transfer fluid, and discretized the governing equations...
Micro-grid is gaining momentum as it addresses grave concerns like climate change and energy security. This paper presents power flow control algorithm for voltage source inverter used in a micro-grid under unbalanced grid conditions. Energy Storage and local energy source are the key components of the micro-grid that is required to help stabilize grid. There is a variety of technologies that can...
Microgrids are proving themselves viable to address the need for more reliable renewable power systems. They can improve the resilience of the overall system in case of abnormal conditions. The city of Spokane in Washington, is considering establishing a microgrid using existing transmission and distribution infrastructure. This microgrid will be supplied solely from the existing hydroelectric generators...
The electric grid is a critical cyber-physical infrastructure that serves as lifeline for modern society. With the increasing trend of cyber-attacks, electric grid security has become a significant concern. System operators have the difficult task of reducing the risk exposure and maintaining operational reliability under the constant threat of cyber-attacks. Good security metrics for assessing and...
Determining voltage phase angles of buses in a Smart Grid is a critical operation in the power system state estimation process. Invalid state estimate of strategic buses can cause a severe socioeconomic impact. In this paper, we present an optimal protection scheme to protect the voltage phase angle estimation of strategic buses in a Smart Grid against data spoofing attacks. We discuss the limitations...
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