Home Search

VARIATIONS - SEARCH RESULTS

If you're not happy with the results, please do another search
Performance/Cost Trade-offs in PV Systems Wiring/Cabling Selection

Performance/Cost Trade-offs in PV Systems Wiring/Cabling Selection

As the solar industry develops, we find many variations in design and specification requirements. Along with these variations, there is a great deal of misinformation and misunderstanding of the distinctions among various cable types and the characteristics of different cable constructions.
Solar Updraft Towers: Variations and Research

Solar Updraft Towers: Variations and Research

The idea of using solar radiation to generate air convection that can subsequently be converted to an energy source has been around since the start of the 20th century, when a Spanish Colonel called Isidoro Cabanyes proposed it in a scientific magazine. Solar Updraft towers, also called solar wind or solar chimney plants, provide a very simple method for renewable electricity generation, with a constant and reliable output. Other renewable energy sources such as wind turbines and solar arrays suffer from high diurnal and seasonal fluctuations, or unpredictable patterns of output.
Mitigating Variability: Advances in Wind Resource Assessment and Modelling

Mitigating Variability: Advances in Wind Resource Assessment and Modelling

A clear understanding and predictive modelling of resources already yields dividends in the fossil-fuelled sector. And this approach is even more important for the wind industry, where even a slight variation in wind energy production can have significant financial impact, says Richard Krauze.
Cellulosic Biofuel: Reducing Cost Through Cellulosic Biomass Supply Strategy

Cellulosic Biofuel: Reducing Cost Through Cellulosic Biomass Supply Strategy

To bring step reductions in biomass cost, a strategic biomass supply approach is required based on a holistic evaluation of the intricate relationship between biomass transport cost, biomass supply variability risks, biomass supply market structure, alternative feedstock availability, and incentives offered to farmers.
A Call for Cost Comparisons: How Can the US Achieve a Renewable Energy Transformation?

A Call for Cost Comparisons: How Can the US Achieve a Renewable Energy Transformation?

Carnige Melon University’s Climate and Energy Decision Making Center’s recent study, “Regional variations in the health, environmental, and climate benefits of wind and solar generation,” is a testimony to the difficulty of cost justifying renewable energy development.
Power optimizers: Centralized vs. distributed MPPT

Power optimizers: Centralized vs. distributed MPPT

Small variations in cell parameters can affect the system-level performance of a PV array. National Semiconductor's Ralf Muenster explains how distributed maximum power point tracking (MPPT) enabled by power optimizer technology can solve the panel mismatch problem.
Eye on the Wind: Innovations Designed to “See” and Track Gusts

Eye on the Wind: Innovations Designed to “See” and Track Gusts

High-technology company Catch the Wind is commercialising a nacelle-mounted, forward-looking system capable of sensing both wind speed and direction, as well as rapid wind variations. In December 2009, the company released striking trial test results for the innovative lightweight technology, claimed as unique and named the Vindicator Laser Wind Sensor (LWS).
Designing for Wind: What Current Codes Don’t Tell Us, But Should

Designing for Wind: What Current Codes Don’t Tell Us, But Should

Rapid growth in the solar industry has triggered a pressing need for consistent solar engineering and construction standards, particularly in connection with the structural design of rooftop PV systems. Over the last decade, we've seen an incredible variation in requirements and requests from project engineers and permitting officials across North America for more than 1,000 projects.
Predicting PV Plant Power Fluctuations and Optimising Energy Storage

Predicting PV Plant Power Fluctuations and Optimising Energy Storage

The ability to accurately predict and prevent power fluctuations is of considerable importance to solar PV (photovoltaic) plant operators in terms of sustaining profitability, estimating revenue returns and ensuring customer quality of service. Variations in solar irradiance can cause rapid fluctuations in power generation, reducing the quality and reliability of the power generated by large grid-connected PV plants.
Drive and innovation: The DeWind D8.2 with Voith WinDrive

Drive and innovation: The DeWind D8.2 with Voith WinDrive

Turbine manufacturer DeWind has had an interesting journey in recent years, passing through a succession of owners before reaching the hands of US company CTC. Now plans are underway to begin production of the D8.2 model, a variation on the D8 design tailored for the US market. Eize de Vries reports.