scholarly journals Feasibility of Man-Portable Power Generation Systems

2018 ◽  
Vol 15 (1) ◽  
Author(s):  
Earl Allen ◽  
Nelson Fumo
Keyword(s):  
Power Generation ◽  
Power Systems ◽  
Outdoor Recreation ◽  
Combustion Engine ◽  
Common Source ◽  
Portable Devices ◽  
Power Sources ◽  
Portable Power ◽  
Power Generation Systems ◽  
The Military

Electric power is the most common source of power for many portable devices used in outdoor recreation, emergency scenarios, and military applications. Batteries that have limitations regarding power and energy are currently meeting the power demand for most of these devices. There is a search to use alternative power sources for portable energy needs. This search has mostly been researched particularly for the military to satisfy functions necessary for soldiers. However, any alternative that would provide electricity in an efficient and timely manner is useful in many applications beyond the military. The feasibility of man-portable power generation systems using thermal energy from any kind of fuels needs to be studied further, to understand if they are truly an option for situations where batteries are currently used. In this study, the feasibility of fueled power systems is investigated. Commercially available small power systems show that they are not small enough to satisfy the definition of man-portable power system. However, power systems working on an internal combustion engine show to be a better option when compared to batteries and fuel cells. KEYWORDS: Fueled Power Generation; Man-portable Power; Power Density; Energy Density

scholarly journals Hot Gas Filters for Coal and Biomass Power Systems

1999 ◽  
Author(s):  
R. A. Newby ◽  
T. E. Lippert ◽  
M. A. Alvin ◽  
G. J. Bruck ◽  
Z. N. Sanjana ◽  
...  
Keyword(s):  
Power Generation ◽  
Power Systems ◽  
Large Scale ◽  
Recent Progress ◽  
Environmental Constraints ◽  
Development Programs ◽  
Key Technology ◽  
Hot Gas ◽  
Filter Test ◽  
Power Generation Systems

Several advanced, coal- and biomass-based combustion turbine power generation technologies are currently under development and demonstration. A key technology component in these power generation systems is the hot gas filter. These power generation technologies must utilize highly reliable and efficient hot gas filter systems to protect the turbine and to meet environmental constraints if their full thermal efficiency and cost potential is to be realized. Siemens Westinghouse Power Corporation (SWPC) has developed a hot gas filter system to near-commercial status for large-scale power generation applications. This paper reviews recent progress made by SWPC in hot gas filter test development programs and in major demonstration programs. Two advanced hot gas filter concepts, the “Inverted Candle” and the “Sheet Filter”, having the potential for superior reliability are also described.

scholarly journals Micro internal combustion swing engine (MICSE) for portable power generation systems

2002 ◽  
Author(s):  
W. Dahm ◽  
J. Mijit ◽  
R. Mayor ◽  
G. Qiao ◽  
A. Benajmin ◽  
...  
Keyword(s):  
Power Generation ◽  
Internal Combustion ◽  
Portable Power ◽  
Swing Engine ◽  
Power Generation Systems

Gas Turbine Systems Designed for Coal Water Slurries

1984 ◽  
Author(s):  
A. J. Giramonti ◽  
F. L. Robson
Keyword(s):  
Power Generation ◽  
Corrosion Resistance ◽  
Power Systems ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Ceramic Coatings ◽  
Combined Cycle ◽  
Coal Powder ◽  
Combined Cycle Plant ◽  
Power Generation Systems

Numerous attempts have been made during the past two decades to develop advanced power generation systems which could burn coal or coal-derived fuels both economically and in an environmentally acceptable manner. Although much valuable technology has been derived from these programs, commercially viable power generation alternatives have not yet appeared. One prospective way to expedite the commercialization of advanced coal-fired power systems is to meld the latest gas turbine technology with the emerging technology for producing slurries of water and ultra clean coal. This paper describes a DOE-sponsored program to identify the most attractive gas turbine power system that can operate on slurry fuels. The approach is to use slurries produced from finely ground (<10 microns) coal powder from which most of the ash and sulfur has been removed. The gas turbines will incorporate a rich-burn, quick-quench combustor to minimize conversion of fuel-bound nitrogen to NOx, advanced single crystal alloys with improved hot corrosion resistance and strength, advanced metallic and ceramic coatings with improved erosion and corrosion resistance, and more effective hot section cooling. Two different power plant configurations are covered: a large (nominally 400 MW) combined cycle plant designed for base load applications; and a small (nominally 12 MW) simple-cycle plant designed for peaking, industrial, and cogeneration applications.

The Ocean as a Renewable Source of Energy

1975 ◽  
Vol 97 (3) ◽  
pp. 897-908 ◽  
Author(s):  
O. M. Griffin
Keyword(s):  
Power Generation ◽  
Research And Development ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Thermal Power ◽  
Tidal Power ◽  
Power Sources ◽  
Energy Needs ◽  
Tidal Power Generation ◽  
Power Generation Systems

The oceans and their environment have long been envisioned as renewable sources of energy. It is the purpose of this paper to assess the feasibility of drawing on the sea for power and to determine the extent to which the oceans are likely to serve future energy needs. A review is made of recent U. S. funding levels for the research and development of renewable energy sources during the fiscal years 1971–1975, and a study is made of the technical and environmertal acceptability status of tidal, wind, and sea thermal power generation systems. The estimated costs of these environmental power sources are compared with the prevailing power costs for nuclear and coal plants. On the basis of these comparisons, recommendations are made for a program of research and development culminating in the construction of prototype plants for wind and sea thermal power plants. Tidal power generation is found to be technically feasible but economically uninviting at present.

scholarly journals Reliability and maintenance of wind power systems

2020 ◽  
Vol 6 (3) ◽  
pp. 13-23
Author(s):  
Alexandru Marius VIIŞOREANU ◽  
◽  
Alina VIIŞOREANU-RĂCHIŢEANU ◽  
Keyword(s):  
Power Generation ◽  
Power Systems ◽  
Wind Power ◽  
Preventive Maintenance ◽  
Wind Power Generation ◽  
Wind System ◽  
Defect Analysis ◽  
Wind Power Systems ◽  
Main Components ◽  
Power Generation Systems

The paper presents the basics on the reliability and maintenance of wind power generation systems. The positive and negative practical aspects of the operation of a monitored wind system shall be analyzed and the strategies applied to perform maintenance of this system shall be presented in the most commonly known variants: Corrective maintenance, preventive maintenance and predictive maintenance. Defect analysis of the main components of the wind system is carried out in order to improve its reliability.

Towards More Reliable Renewable Power Systems - Thermal Performance Evaluation of DC/DC Boost Converters Switching Devices

2015 ◽  
Vol 6 (4) ◽  
pp. 876 ◽  
Author(s):  
Canras Batunlu ◽  
Alhussein Albarbar
Keyword(s):  
Power Generation ◽  
Power Systems ◽  
Thermal Characteristics ◽  
Clear Understanding ◽  
Font Size ◽  
Boost Converters ◽  
Renewable Power ◽  
Renewable Power Generation ◽  
Power Generation Systems ◽  
Switching Devices

<span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 10pt; mso-fareast-language: EN-US; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN-GB; mso-bidi-language: AR-SA;">Power electronic converters (PECs) are one of the most important elements within renewable power generation systems. The reliability of switching elements of PECs is still below expectations and is a major contributor to the downtime of renewable power generation systems. Conventional technology based elements such as Silicon Insulated Gate Bipolar Transistors (IGBTs) operate as switching components in PECs. Recent topological improvements have led to new devices called Silicon Carbide (SiC) MOSFETs which, are also being used as switching elements for PECs. <span style="color: black; mso-themecolor: text1;">This paper presents detailed investigations into the performance of those switching devices with a focus on their reliability and thermal characteristics. Namely, trench gate NPT, FS IGBT topologies and SiC MOSFET are firstly modelled using 3-D multi-physics finite element modelling to gain clear understanding of their thermal behaviour. Subsequently, modelling outcomes are verified by using those devices as switching elements in operational boost converters. The purposely-developed test setups are utilised to critically assess the performances of those switching devices under different loading and environmental conditions. In general, </span></span><span style="font-family: &quot;Times New Roman&quot;,serif; font-size: 10pt; mso-fareast-language: EN-GB; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-ansi-language: EN-GB; mso-bidi-language: AR-SA;">SiC device was found to exhibit<span style="mso-spacerun: yes;"> </span>about 20 °C less in its operating temperature and therefore expected to offer more reliable switching element. </span>

scholarly journals An Importance Analysis–Based Weight Evaluation Framework for Identifying Key Components of Multi-Configuration Off-Grid Wind Power Generation Systems under Stochastic Data Inputs

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4372 ◽  
Author(s):  
Lingling Bin ◽  
Haiyang Pan ◽  
Li He ◽  
Jijian Lian
Keyword(s):  
Power Generation ◽  
Power Systems ◽  
Wind Power ◽  
Wind Power Generation ◽  
Evaluation Framework ◽  
Electricity Production ◽  
Component Importance ◽  
Importance Analysis ◽  
Wind Power Systems ◽  
Power Generation Systems

Wind power systems have great potential due to its inexhaustible nature and benign environmental impacts. Especially in remote areas, where wind is plentiful, but it is difficult to get grid-connected power, an off-grid wind power system is an effective alternative for power supply. Reliable and safe operation of the generating system are essential for electricity production and supply. Importance analysis to identify key components of the system is a critical part of reliability assessment. This paper proposes an importance analysis–based weight evaluation framework for identifying key components of multi-configuration off-grid wind power generation systems under stochastic inputs. In the framework, the joint importance analysis based on Birnbaum importance and Criticality importance are introduced to analyze the system reliability and failure rate. Wind speed with stochastic characteristics, load demand with multiple scenarios, and energy transfer with different paths are also merged into the evaluation framework. The results reveal that the rectifier, battery, discharge load, and valve controller dominate the reliability of the off-grid wind power generation system. High priority should be placed on these components during the design phase and maintenance stage. The proposed approach is a positive step forward in promoting component importance analysis and providing more theoretical supports in system design, reliability analysis, and monitoring scheme formulation.

scholarly journals Status of Westinghouse Hot Gas Filters for Coal and Biomass Power Systems

1998 ◽  
Author(s):  
R. A. Newby ◽  
T. E. Lippert ◽  
M. A. Alvin ◽  
G. J. Bruck ◽  
Z. N. Sanjana
Keyword(s):  
Power Generation ◽  
Power Systems ◽  
Thermal Efficiency ◽  
Solid Fuels ◽  
Hot Gas ◽  
Power Generation Systems

Several advanced, coal- and biomass-based combustion turbine power generation technologies using solid fuels (IGCC, PFBC, Topping-PFBC, HIPPS) are currently under development and demonstration. A key developing technology in these power generation systems is the hot gas filter. These power generation technologies must utilize highly reliable and efficient hot gas filter systems if their full thermal efficiency and cost potential is to be realized. This paper reviews the recent test and design progress made by Westinghouse in the development and demonstration of hot gas ceramic barrier filters toward the goal of reliability. The objective of this work is to develop and qualify, through analysis and testing, practical hot gas ceramic barrier filter systems that meet the performance and operational requirements for these applications.

scholarly journals Frequency Domain Stability Assessment of Photovoltaic Power Generation Systems with Quasi-Z-Source Inverters

2021 ◽  
Vol 19 ◽  
pp. 160-165
Author(s):  
Luis Sainz ◽  
◽  
Ll Monjo ◽  
Keyword(s):  
Power Generation ◽  
Frequency Domain ◽  
Stability Assessment ◽  
Power Sources ◽  
Renewable Power ◽  
Photovoltaic Power ◽  
Space Matrix ◽  
The Stability ◽  
Power Generation Systems ◽  
Averaged Model

Photovoltaic power generation systems are one of the main renewable power sources, and quasi-Z-source inverters are becoming powerful devices to integrate these systems in AC grids. However, stability issues due to the damping behaviour of converters must be considered. There are several studies in this direction but instability concerns are not completely solved yet. This paper contributes with a procedure for the stability assessment of photovoltaic power generation systems with quasiZ-source inverters in the frequency domain. The study is based on the small-signal averaged model of the system expressed in the s-domain and the stability criterion derived from the frequency characteristics of the state-space matrix. The influence of the photovoltaic power generation system operating point on stability is studied by the proposed procedure. Eigenvalue analysis and PSCAD/EMTDC simulations are also performed to validate the obtained results.

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