scholarly journals Energy Systems Comparison and Clean High Tech Evolution

10.5772/10081 ◽  
2010 ◽  
Author(s):  
Gustav Grob
Keyword(s):  
Energy Systems ◽  
High Tech

TRANSEO Code for the Dynamic Performance Simulation of Micro Gas Turbine Cycles

2005 ◽  
Author(s):  
A. Traverso
Keyword(s):  
High Temperature ◽  
Gas Turbine ◽  
Dynamic Performance ◽  
Energy Systems ◽  
Theoretical Background ◽  
High Tech ◽  
Performance Simulation ◽  
Main Components ◽  
New Variables ◽  
And Control

In recent years microturbines and, more generally, small radial turbomachinery have been of great interest to the power industry due to their possible integration with advanced energy systems involving very high-tech components, such as high temperature fuel cells, high temperature ceramic heat exchangers and air saturators, which are still under development. Even if microturbine technology is already commercially available, when such an engine is inserted into a more complex plant there are at least two difficulties to be faced: firstly, guaranteeing the safe operation of the microturbine at all the operating points, including start-up and shut-down; and secondly, ensuring the proper feeding conditions to the main components of the cycle. In fact, additional components bring new variables to be monitored and require additional control devices and control systems. As a result, a flexible and modular simulation tool is extremely useful for the actual development of new cycles, where attention is mainly paid to the interaction of quasi-conventional turbomachinery with advanced components integrated in the same cycle. The TRANSEO code is a MATLAB-based modular tool for the transient performance simulation of conventional and advanced energy systems based on gas turbine and microturbine technology. This paper presents the theoretical background and the organization of the tool, showing the validation of results for a conventional recuperated microturbine.

scholarly journals Resource Assessment of Renewable Energy Systems—A Review

2021 ◽  
Vol 13 (11) ◽  
pp. 6107
Author(s):  
Kim Maya Yavor ◽  
Vanessa Bach ◽  
Matthias Finkbeiner
Keyword(s):  
Renewable Energy ◽  
Resource Use ◽  
Grey Literature ◽  
Energy Systems ◽  
Energy Transition ◽  
Energy System ◽  
Resource Assessment ◽  
High Tech ◽  
Renewable Energy Systems ◽  
Trade Offs

The reduction of greenhouse gas emissions by the energy transition may lead to trade-offs with other impacts on the environment, society, and economy. One challenge is resource use impacts due to increasing demand for high-tech metals and minerals. A review of the current state of the art resource assessment of energy systems was conducted to identify gaps in research and application. Publications covering complete energy systems and supplying a detailed resource assessment were the focus of the evaluation. Overall, 92 publications were identified and categorized by the type of system covered and the applied abiotic resource assessment methods. A total of 78 out of 92 publications covered sub-systems of renewable energy systems, and nine considered complete energy systems and conducted a detailed resource use assessment. Most of the publications in the group “complete energy system and detailed resource assessment” were found in grey literature. Several different aspects were covered to assess resource use. Thirty publications focused on similar aspects including criticality and supply risks, but technology-specific aspects are rarely assessed in the resource assessment of renewable energy systems. Few publications included sector coupling technologies, and among the publications most relevant to the aim of this paper one third did not conduct an indicator-driven assessment.

EFFICIENCY OF HEAT GENERATION ON THE EXAMPLE OF IMPLEMENTATION OF AN INVESTMENT PROJECT

2020 ◽  
Vol 2 (3) ◽  
pp. 24-30
Author(s):  
S. M. MOLCHANOVA ◽  
◽  
K. V. LOSEV ◽  
Keyword(s):  
Sensitivity Analysis ◽  
Power Plants ◽  
Economic Effect ◽  
Investment Project ◽  
Energy Systems ◽  
Electricity Sector ◽  
High Tech ◽  
Characteristic Features ◽  
The Impact ◽  
The City

The article discusses the characteristic features of the electricity industry, issues of economic efficiency of innovative projects in the electricity sector. It is emphasized that the construction of modern power plants contributes to the development of modern, high-tech production, provides priority use of the combined generation of electric and thermal electricity. The authors experimentally substantiated the need to modernize obsolete equipment through the construction of recycling units with the further generation of heat and electricity for consumers in the city. The analysis of the impact of the implemented project on the profit and efficiency of the use of enterprise resources is carried out, its effectiveness is calculated, the sensitivity analysis is carried out and profitability indicators are presented for the construction of a new CHP unit. The conclusion is formulated on a favorable solution for the construction of a gas-fired CHPP, the construction and modernization of which will provide a significant economic effect in energy systems.

Why We Need High-tech Politics to Make Renewables a Success Story

Green ◽  
2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Kathrin Goldammer ◽  
Ulrich Mans
Keyword(s):  
Renewable Energy ◽  
Sustainable Energy ◽  
Scale Up ◽  
Political Leadership ◽  
Energy Systems ◽  
Energy System ◽  
High Tech ◽  
Energy Infrastructure ◽  
Sustainable Energy System ◽  
The Way

AbstractWith the continued growth of renewable energy technologies, major changes are under way in a growing number of energy systems across the globe. Wind, solar, biomass, hydroelectric and geothermal solutions experience an impressive boom and have created a new business sector worth US$243 billion in 2011. This trend is not caused by recent breakthroughs in engineering; in fact most of the technology has been around for some time. The way we organize our energy infrastructure is not primarily a technical matter; it is above all a political decision. The scale-up of renewable energy supplies at the cost of today's fossil-fuel dominated energy infrastructure is a systemic transition from one technology regime to another and thus requires political leadership for setting the targets, guiding institutional change, freeing resources and deciding on the relevant regulations. Today's energy systems are based on well-established routines and – as any other existing societal arrangement – are governed by a certain degree of lock-in: because people are generally happy to do things the way they have done it in the past, they are unlikely to embrace change quickly. These “lock-ins” shape, to a large extent, the speed of change as well as the type of solutions required in order to leave behind what works for today in favor of what we want to work for tomorrow. This article provides an overview of recent developments in the energy systems in Germany, California and Japan. We show that in order to appreciate the dilemma's that arise when creating a more sustainable energy system, we need to understand the local political landscape and how it influences decision-making processes. Looking at the three regions, it becomes evident that the level of political leadership determines much of what technology can do to facilitate innovation in the field of sustainable energy.

Spiritual Healing, Sick Kids and the Law: Inequities in the American Healthcare System

2003 ◽  
Vol 29 (2-3) ◽  
pp. 269-299
Author(s):  
Janna C. Merrick
Keyword(s):  
Medical Science ◽  
Spiritual Healing ◽  
Best Interests ◽  
Legal Rights ◽  
High Tech ◽  
Divine Love ◽  
Religious Minority ◽  
Human Need ◽  
East End ◽  
The Church

Main Street in Sarasota, Florida. A high-tech medical arts building rises from the east end, the county's historic three-story courthouse is two blocks to the west and sandwiched in between is the First Church of Christ, Scientist. A verse inscribed on the wall behind the pulpit of the church reads: “Divine Love Always Has Met and Always Will Meet Every Human Need.” This is the church where William and Christine Hermanson worshipped. It is just a few steps away from the courthouse where they were convicted of child abuse and third-degree murder for failing to provide conventional medical care for their seven-year-old daughter.This Article is about the intersection of “divine love” and “the best interests of the child.” It is about a pluralistic society where the dominant culture reveres medical science, but where a religious minority shuns and perhaps fears that same medical science. It is also about the struggle among different religious interests to define the legal rights of the citizenry.

Comparative Effects of High-Tech Visual Scene Displays and Low-Tech Isolated Picture Symbols on Engagement From Students With Multiple Disabilities

2019 ◽  
Vol 50 (4) ◽  
pp. 693-702 ◽  
Author(s):  
Christine Holyfield ◽  
Sydney Brooks ◽  
Allison Schluterman
Keyword(s):  
Language Learning ◽  
Augmentative And Alternative Communication ◽  
Visual Analysis ◽  
Multiple Disabilities ◽  
Visual Scene ◽  
Future Research ◽  
High Tech ◽  
Single Subject ◽  
Wide Range ◽  
The Difference

Purpose Augmentative and alternative communication (AAC) is an intervention approach that can promote communication and language in children with multiple disabilities who are beginning communicators. While a wide range of AAC technologies are available, little is known about the comparative effects of specific technology options. Given that engagement can be low for beginning communicators with multiple disabilities, the current study provides initial information about the comparative effects of 2 AAC technology options—high-tech visual scene displays (VSDs) and low-tech isolated picture symbols—on engagement. Method Three elementary-age beginning communicators with multiple disabilities participated. The study used a single-subject, alternating treatment design with each technology serving as a condition. Participants interacted with their school speech-language pathologists using each of the 2 technologies across 5 sessions in a block randomized order. Results According to visual analysis and nonoverlap of all pairs calculations, all 3 participants demonstrated more engagement with the high-tech VSDs than the low-tech isolated picture symbols as measured by their seconds of gaze toward each technology option. Despite the difference in engagement observed, there was no clear difference across the 2 conditions in engagement toward the communication partner or use of the AAC. Conclusions Clinicians can consider measuring engagement when evaluating AAC technology options for children with multiple disabilities and should consider evaluating high-tech VSDs as 1 technology option for them. Future research must explore the extent to which differences in engagement to particular AAC technologies result in differences in communication and language learning over time as might be expected.

AAC Considerations for Individuals With Angelman Syndrome

2015 ◽  
Vol 24 (3) ◽  
pp. 106-113 ◽  
Author(s):  
Stephen N. Calculator
Keyword(s):  
Angelman Syndrome ◽  
Augmentative And Alternative Communication ◽  
High Tech ◽  
Alternative Communication ◽  
Design And Implementation

Purpose To provide an overview of communication characteristics exhibited by individuals with Angelman Syndrome (AS) and special considerations associated with the design and implementation of augmentative and alternative communication (AAC) programs. Method Results of recent studies exploring individuals' uses of AAC are reviewed, with particular emphasis on factors related to individuals' acceptance and successful uses of AAC systems. Results Not applicable Conclusion Despite their inconsistent access to practices previously found to foster individuals' acceptance of AAC systems, individuals with AS demonstrate the ability to use AAC systems, including high-tech AAC devices, successfully.

Clinical Impressions of How Young Children Use AAC at Home and in Child Care Settings: A Canadian Perspective

2010 ◽  
Vol 19 (1) ◽  
pp. 21-28
Author(s):  
Kathryn Wishart
Keyword(s):  
Child Care ◽  
Young Children ◽  
High Tech ◽  
Speech Language Pathologists ◽  
Cultural Backgrounds ◽  
Community Based ◽  
Multicultural Community ◽  
Canadian Perspective ◽  
Communication Devices ◽  
Stakeholder Input

Abstract Speech-language pathologists, working in a multicultural, community-based environment for young children with special needs in Vancouver, Canada, collected information on 84 clients using AAC from a chart review. The speech-language pathologists collected additional usage information and attended a group interview to discuss barriers and facilitators of AAC. Thirty-one percent of the children were using AAC. Children aged between 16 and 72 months typically relied on multiple modes of communication, including sign, communication boards and binders, and low- and high-tech communication devices. All of the children used at least one type of unaided mode. Fifty-five percent used pictures or communication boards/displays, and 29% used technology with speech output. Similarities in usage of AAC were noted in home and child-care settings with increased use of unaided in homes and a slightly increased use of aided communication in child care settings. Speech-language pathologists reported that the time needed for AAC intervention as well as limited funding for high-tech devices continue to be major barriers. Additional research is needed to describe current AAC practices with young children particularly from minority linguistic and cultural backgrounds. Stakeholder input is needed to explore perceptions of children's usage of AAC in daily life with familiar and unfamiliar communication partners.

Drug Abuse Deterrence Goes High-Tech

2011 ◽  
Vol 44 (8) ◽  
pp. 62
Author(s):  
KERRI WACHTER
Keyword(s):  
Drug Abuse ◽  
High Tech
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