Solar Energy Articles
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How well is clean energy weathering the recession?
The clean energy industry may not be popping the champagne cork, but it is at least holding the bottle in hand. While not unscathed by the recession, the industry sees growth in several sectors, according to recent reports. For example, use of smart meters—a key technology for better energy management and efficiency – is increasing at a rapid clip. A study by ABI Research, “Advanced Metering ...
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Analysis and design of controlled capacitor charging type power frequency inverter
This paper presents the performance of the capacitor charging type inverters. The inverter uses the voltage and current feedback and produces a desired voltage at the output by suitably charging/discharging a capacitor. An inductor is connected in series to limit the charging/discharging current. Both single and three phase inverters are considered. A small signal analysis is presented to ...
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Combined photovoltaic and energy storage systems: an integrated electrification solution for small islands
The numerous small Aegean Sea islands present serious problems related to insufficient infrastructure, low quality of electricity available at very high production cost, as well as problematic connection with the mainland. On the other hand, the high solar potential of the area may encourage photovoltaic-based applications characterised by rather low maintenance support demands. In this context, ...
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Thermodynamic performance analysis of a hybrid Photovoltaic-Thermal (PV/T) integrated greenhouse air heater and dryer
In this paper, performance analysis of a hybrid photovoltaic-thermal (PV/T) greenhouse air heater and dryer has been carried out. Analytical expressions have been developed for: greenhouse air temperature, instantaneous and overall energy and exergy efficiencies for without load, and instantaneous exergy efficiency with load under forced mode operation. An experimental validation has been carried ...
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Omani Bedouins' readiness to accept solar thermoelectric refrigeration systems
In this work, a portable solar thermoelectric refrigerator was built in order to help Bedouin people living in remote parts of Oman. The purpose of the study was to demonstrate the feasibility of the implementation of the fabricated solar thermoelectric refrigerator. To this end, a survey questionnaire was conducted in order to evaluate the willingness of the Bedouin to buy the designed unit. ...
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Optimal scheduling and operation of hybrid biomass/wind/PV energy system for rural areas
In this paper, a hybrid energy system consisting of biomass, wind, solar photovoltaic (SPV) and battery, is proposed. The sources are operated to deliver energy at optimum efficiency. An optimisation model is developed to supply the available energy to the loads according to the priority. It is also proposed to maintain a fair level of energy storage to meet the peak load demand together with ...
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Creating Your Own Solar Energy Business on a Small Budget
We are at the dawn of a solar explosion in the United States. Every aspect of the solar industry is experiencing explosive growth. Triple digit expansion in solar photovoltaic cell manufacturing, to the need for solar sales associates, to the huge demand for solar system installers is emerging everywhere. Opportunities abound. Due to this commitment, the Department of Energy will be more than ...
By Solargies
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Scenarios for the role of hydrogen in a future energy system based on renewable energy
An all-renewable energy system for a group of North European countries is investigated by temporal simulation of the demand-supply matching for various system configurations. The role of hydrogen technologies for energy storage and fuel cell applications is studied and applied to both stationary and transportation sectors. It is shown that there is scope for considerable amounts of energy trade ...
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The technoeconomic assessment of the hydrogen fuel chain
Options for hydrogen fuel chain are compared with the existing petroleum-based fuel chain for transportation. The criteria used are the life cycle cost (Rs/km), Greenhouse Gas (GHG) emissions (g/km) and Nonrenewable Energy (NRE) consumption (MJ/km). Four hydrogen production methods, one hydrogen transport method, three hydrogen storage methods and two on-board energy conversion methods are ...
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Energy efficiency’s US$1tr identity
The energy efficiency industry is a bit like the orphan who grows up to discover his long-lost parents left him a fortune.The industry suffers from an identity crisis, says a report by the American Solar Energy Society. What is energy efficiency? Insulating attics? Demand response? Plug-in hybrids? Led lights? Combined heat and power?ASES decided to quantify the worth of the energy efficiency job ...
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Starting your own home-based solar energy business
To be a solar energy, you do not need to be a college graduate or a seasoned sales executive. All you need to be is someone with the desire to make a difference in the World, and someone who shares the belief that home solar power will make that difference. That's it. There has never been a better time than now to create a solar energy business. The cost of energy, across all industry ...
By Solargies
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Energy efficiency markets chooses its favorites of 2008
We appreciate the entries submitted for Energy Efficiency Markets’ first annual ‘best of’ contest. It is difficult to select winners in an industry that is burgeoning with innovation. We hope you find our selections as intriguing as we did. Please continue to email us about interesting projects – we’d like to highlight them periodically in our weekly newsletter:1. Best appliance: Energy ...
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Plan B efficiency and conservation measures drop energy demand by 2020
Projections from the International Energy Agency show global energy demand growing by close to 30 percent by 2020, setting the stage for massive growth in the carbon dioxide emissions that are warming our planet. But dramatically ramping up energy efficiency would allow the world to not only avoid growth in energy demand but actually reduce global demand to below 2006 levels by 2020. We can ...
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Application of an artificial neural network for predicting the sizing curve of stand-alone photovoltaic system: a case study
In this paper, an artificial neural network-based (ANN) prediction of the sizing curve of stand-alone PV systems (SAPV) was developed. Numerical method has been used for constructing the sizing curves for different loss of load probability (LLP) corresponding to 40-sites located in Algeria. The feed-forward neural network (FFNN) is trained considering the geographical coordinate and LLP as ...
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Solar Chimneys in Buildings - The State of the Art
Improvement of the energy performance of buildings and achievement of indoor comfort conditions can be attained by passive cooling techniques and energy efficient measures. Natural ventilation is one of the simplest and most widely applied cooling strategies, achieved by permitting air to flow through the building. The solar chimney is a construction on the building's envelope that exploits solar ...
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Create new jobs & cut emissions by investing in renewable energy efficiency
At a time when major US companies are announcing job layoffs almost daily, the renewable energy industry is hiring new workers every day to build wind farms, install rooftop solar arrays, and build solar thermal and geothermal power plants. The output of industrial firms that manufacture the equipment for these energy facilities is expanding by well over 30 percent a year. These investments both ...
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Front-load washers: Leaky solar panels revisited?
Some days I’d like to throw my front-load clothes washer out the back door. But that probably won’t be necessary because it may walk out on its own. The LG product shakes and rattles so much in the spin cycle that it ‘walks’ several inches across the floor each day. One guest to my kitchen thought we were experiencing an earthquake. Sears repairmen have visited twice, but tell me nothing is wrong ...
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Influence of streamer-to-glow transition mode on the NO removal by an inductive energy storage type pulse power generator
Influence of streamer-to-glow transition on NO removal from a simulated diesel exhaust gas is described in this paper. A coaxial cylinder nonthermal plasma reactor was driven by an inductive energy storage pulse power generator employing a fast recovery diode as semiconductor opening switch. The NO removal increased with input energy into the reactor. The energy efficiency for 30% NO removal was ...
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Alternative scenarios of the utilisation of renewable energy sources in small prefectures: a case study in Lasithi Prefecture, Greece
The sector of Renewable Energy Sources (RESs) is growing very fast, with many innovations and applications becoming a reality. The continuous reduction of natural resources has forced all policymakers to turn to alternative energy sources. The total energy (oil and electricity consumption) consumed in the prefecture of Lasithi during the years 1997?2002 in correlation with the RES exploitation ...
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Solar potential for the solar photovoltaic roof integration system in China explored by the geographic information system
This paper estimates the potential solar power for the solar photovoltaic Roof Integration System (RIS) using the Geographic Information System (GIS) method, taking into account the geographic distribution of solar irradiation and the estimate of costs for the RIS and identifies the distribution of potential solar energy radiating on the RIS and power. The total urban roof area is estimated to be ...
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