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Contents contributed and discussions participated by Hans De Keulenaer

Hans De Keulenaer

Renewable energy in Europe - approximated recent growth and knock-on effects - European... - 3 views

  • This report introduces several methods the European Environment Agency (EEA) has developed for assessing and communicating early RES growth and the important knock-on effects that RES growth has on the energy sector and related areas. The report provides specific information at EU and country level on estimated RES progress in 2013, estimated gross avoided carbon dioxide (CO2) emissions and avoided fossil fuel use due to the additional use of renewable energy since 2005, as well as an assessment of the statistical impacts of growing RES use on primary energy consumption.
Hans De Keulenaer

Grid-scale energy storage applications in renewable energy integration: A survey - 2 views

  • This paper examines both the potential of and barriers to grid-scale energy storage playing a substantive role in transitioning to an efficient, reliable and cost-effective power system with a high penetration of renewable energy sources. Grid-scale storage is a term that describes a number of different technologies with a wide range of characteristics. This versatility leads to the use of storage to perform a number of grid-services. We first enumerate these services, with an emphasize on those that are best suited to mitigate the effects of uncertainty and variability associated with intermittent, non-dispatchable renewable energy sources. We then provide an overview of the current methods to evaluate grid-integrated storage, summarize key findings, and highlight ongoing challenges to large-scale adoption of grid-scale energy storage. We focus on one particular area that is critical to both the efficient use of energy storage in the power grid and its long-term economic viability: the conflict between the technical benefits of this resource, which can provide both power and energy related grid-services (in some cases simultaneously), and the economic challenges of compensating these services within the current market structures. We then examine recent progress in addressing these issues through regulatory changes and other initiatives designed to mitigate previous market failures. This discussion is followed by some remarks about ongoing regulatory and market design challenges. The paper closes with a summary of the ideas presented and a discussion of critical research needs.
Hans De Keulenaer

Capital-energy substitution: Evidence from a panel of Irish manufacturing firms - 2 views

    "We use a translog cost function to model production in the Irish manufacturing sector over the period from 1991 to 2009. We estimate both own- and cross-price elasticities and Morishima elasticities of substitution between capital, labour, materials and energy. We find that capital and energy are substitutes in the production process. Across all firms we find that a 1% rise in the price of energy is associated with an increase of 0.04% in the demand for capital. The Morishima elasticities, which reflect the technological substitution potential, indicate that a 1% increase in the price of energy causes the capital/energy input ratio to increase by 1.5%. The demand for capital in energy-intensive firms is more responsive to increases in energy prices, while it is less responsive in foreign-owned firms. We also observe a sharp decline in firms' responsiveness in the first half of the sample period."
Hans De Keulenaer

Logging Occupancy to Optimize Energy Use - Energy Efficiency Markets - 2 views

  • Every occupant in a building creates demand for lighting, ventilation, thermal comfort, and electrical power. Lighting, heating, and cooling unoccupied spaces is a huge source of energy waste in buildings, and many studies have shown that building occupancy profiles have a significant impact on building energy use and operational controls.

    Closer alignment of occupancy patterns to building equipment schedules can be an effective low-cost/no-cost energy efficiency strategy leading to more intelligent control of buildings, a better balance between occupant comfort and energy savings, and lower utility bills. This includes, but is not limited to, HVAC temperature set points, lighting schedules, and economizer schedules.

Hans De Keulenaer

Electricity and Power Storage - Ares North America - 3 views

  • Advanced Rail Energy Storage (ARES), is a Santa Barbara, California based company, providing a deployable solution for grid-scale energy storage. ARES mission is to enable the electric grid to integrate unprecedented amounts of clean, environmentally responsible, renewable energy while maintaining the reliable electric service necessary to power growth and prosperity. Since it's founding in February 2010, ARES has developed and filed both domestic and international patents for an advanced method of utility-scale electrical storage. ARES facilities are designed to: provide grid security and reliability; support the increased use of renewable technologies, and to provide an energy storage solution that does not rely on water.
Hans De Keulenaer

Energy Harvesting the Next Big Thing for the Smart Grid | The Energy Collective - 0 views

  • Solar panels capture energy from light and convert it to electricity.   This is the most visible form of energy harvesting, but it is hardly the only one.  Energy harvesting captures energy lost as heat, light, sound, vibration, or movement.  Devices that harvest or scavenge energy can capture, accumulate, store, condition, and manage this energy into electricity for consumption.  That’s important, because our existing electricity infrastructure is extremely wasteful in its use of energy.  For instance, today’s technologies used in electricity generation are not energy efficient.  Traditional gas or steam-powered turbines convert heat to mechanical energy, which is then converted to electricity.  Up to two thirds of that energy input is lost as heat.  Those old incandescent bulbs (technology invented by Thomas Edison in 1879) were real energy losers too.  Ninety percent of the electricity flowing into incandescent bulbs ends up as waste heat. That’s lost energy, which is why smart federal legislation banned incandescents in favor of more energy efficient sources of lighting starting in 2012.
Hans De Keulenaer

Clever MIT floating wind turbines can store power for when the wind doesn't blow : Tree... - 0 views

  • A single 25-meter sphere at a depth of 400 meters could store up to 6 megawatt-hours of power, so a large offshore wind farm with hundreds or even thousands of those could become a giant on-demand battery, potentially producing as much power as large power plants (it all depends on how far you scale up the idea). These anchor/storage spheres could be built on land and then brought out to sea. No need for too much super-expensive deep sea construction.

    Preliminary estimates indicate that one such sphere could be built and deployed at a cost of about $12 million, Hodder says, with costs gradually coming down with experience. This could yield an estimated storage cost of about 6 cents per kilowatt-hour — a level considered viable by the utility industry.

Hans De Keulenaer

Battery Could Provide a Cheap Way to Store Solar Power | THE GREEN ENERGY BLOG - 0 views

  • There’s a promising new entry in the race to build cheap batteries for storing energy from solar panels and wind turbines. Stanford researchers led by Yi Cui, a professor of materials science and engineering, have demonstrated a partially liquid battery made of inexpensive lithium and sulfur. Cui says the battery will be easy to make and will last for thousands of charging cycles.

    Cui believes that the material and manufacturing costs of the battery might be low enough to meet the Department of Energy’s goal of $100 per kilowatt-hour of storage capacity, which the DOE estimates will make the technology economically attractive to utilities. Existing batteries can cost hundreds of dollars per kilowatt-hour of capacity, although several companies are working to commercialize cheaper ones (see “Ambri’s Better Battery” and “Battery to Take On Diesel and Natural Gas”).

Hans De Keulenaer

GE Adds Energy Storage to Its Brilliant Wind Energy Turbine - 0 views

  • After premiering its 2.5-megawatt, 120-meter rotor Brilliant wind turbine in February, GE is now announcing the commercial installation of the first three models that will integrate energy storage capability.
Hans De Keulenaer

Was Edison Right After All? Reconsidering DC Power - 1 views

  • Perhaps Thomas Edison was right after all. As new technology develops, it's time to ask the question: should be using direct current (DC) instead of alternating current (AC) power?
Hans De Keulenaer

Germany on the Verge of a Subsidy for Energy Storage - 1 views

  • The energy storage system is meant to be used in tandem with distributed solar installations with storage systems developed in Germany; the funds come with a maximum size requirement of 30 kilowatts. The batteries must have a warranty of at least seven years to gain the subsidy. Another requirement is that the PV installation sends 60 percent of its capacity to the grid over the lifetime of the plant. The battery subsidies will apply retroactively when connected to solar systems installed in 2013, according to reports in PV Magazine.
Hans De Keulenaer

U.S. Government Asks for Sustainability Reports from Contractors - 0 views

  • Did you know that if you are federal contractor and are on the General Services Administration, or GSA, schedule, you will be asked to report on your sustainability efforts?” That’s the question posed by Anca Novacovici, founder and president of Eco-Coach, an environmental sustainability consulting business, in a recent Huffington Post blog. Not surprisingly for a post titled “Federal Contractors Missing the Boat,” her answer is in the negative. She writes, “Many contractors are unaware of the federal reporting requests around sustainability.”
Hans De Keulenaer

A Better Way to Make Fuel from Solar Energy | MIT Technology Review - 1 views

  • Burning natural gas emits about half as much carbon dioxide as burning coal, but it still produces large amounts of the greenhouse gas in the atmosphere. A novel device being developed at the Pacific Northwest National Laboratory (PNNL) could reduce those emissions by 20 percent by using heat from the sun to convert natural gas to an alternative fuel called syngas, a lower carbon fuel.
Hans De Keulenaer

The Pyramid of Conservation | CleanTechies Blog - - 2 views

  • Whether they’re building a new house or improving a well-loved home, energy-conscious homeowners everywhere are trying to lower energy use and costs. Even with the best of intentions, however, consumers are overwhelmed by too much information, which causes many of them to give up long before they screw in their first CFL light bulb. To remedy this situation, Minnesota Power created the Pyramid of Conservation as a “cheat sheet” for consumers who want to live a more energy-efficient life.
Hans De Keulenaer

Vertical-Axis Wind-Turbines Might Increase Wind Power Output | MIT Technology Review - 1 views

  • The remote Alaskan village of Igiugig—home to about 50 people—will be the first to demonstrate a new approach to wind power that could boost power output and, its inventors say, just might make it more affordable.
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