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Alternative & Renewable Energy Blog

The Alternative & Renewable Energy Blog is the place for conversation and discussion about solar power; fuel cells and hydrogen cells; biofuels such as ethanol; wind, water and geothermal energy; and anything else related to renewable power generation. Here, you'll find everything from application ideas, to news and industry trends, to hot topics and cutting edge innovations.

Demand Another Option for Grid Integration

Posted January 17, 2012 9:45 AM

The disruptive impact of renewables introduction to the grid is typically manifest in terms of system instability and declining power prices. Countering these effects requires increased transmission and storage capacity, two costly and not always readily available solutions. Why isn't more emphasis placed on demand response programs to curtail peak demand and help accommodate renewables integration?

The preceding article is a "sneak peek" from Alternative & Renewable Energy, a newsletter from GlobalSpec. To stay up-to-date and informed on industry trends, products, and technologies, subscribe to Alternative & Renewable Energy today.

2 comments; last comment on 01/18/2012
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Shifting Gears: Driving with the Sun

Posted December 20, 2011 8:44 AM

A Do the Math blog post analyzes prospects for the solar-powered car, concluding that 100% on-board solar or battery/roof-mounted PV solutions are not technically or economically feasible. More practical are stand-alone PV and grid-tied PV options for charging EVs. Do you think that solar-powered automobiles can be driven "on the reality side of the reality-fantasy continuum?"

The preceding article is a "sneak peek" from Alternative & Renewable Energy, a newsletter from GlobalSpec. To stay up-to-date and informed on industry trends, products, and technologies, subscribe to Alternative & Renewable Energy today.

4 comments; last comment on 12/22/2011
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U.S. Energy Revolution Blueprint

Posted December 20, 2011 8:44 AM

To save the national economy hundreds of billions of dollars per year by 2050, the U.S. government should invest a few billion dollars more annually to foster energy technology innovations. This major recommendation from a three-year Harvard Kennedy School study argues that doubling energy RD&D spending to $10 billion/year will improve U.S. competitiveness and security in the energy arena and reduce greenhouse gas emissions. Increased funding levels for PV, energy storage, and bioenergy technologies are essential, as are expanded incentives for private sector energy innovation and a substantial price on carbon emissions. The policy rationale is explained in this video.

The preceding article is a "sneak peek" from Alternative & Renewable Energy, a newsletter from GlobalSpec. To stay up-to-date and informed on industry trends, products, and technologies, subscribe to Alternative & Renewable Energy today.

11 comments; last comment on 12/21/2011
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Renewables Reality Check

Posted November 15, 2011 8:38 AM

Bankruptcy filings for Solyndra, Evergreen, and Beacon Power. Uncertainty plaguing continuation of incentives for solar and wind. These and other trends add to the list of upheavals affecting the renewable energy industry in 2011. However, instead of treating these as setbacks, shouldn't these incidents be viewed as growth indicators of an emerging, strengthening sector?

The preceding article is a "sneak peek" from Alternative & Renewable Energy, a newsletter from GlobalSpec. To stay up-to-date and informed on industry trends, products, and technologies, subscribe to Alternative & Renewable Energy today.

13 comments; last comment on 11/23/2011
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Setting a Land Speed Record: Preparation (Part 4)

Posted November 11, 2011 12:01 AM by Old_School

On Friday morning, my team and I arrived early at the airfield and set up our pit area. That was when we discovered an interesting fact about racing: it doesn't matter how early you THINK you are, there are always 10 other people who camped at the track and were up at dawn staking a claim. The tent went up and we spent a few hours getting settled and meeting the other racers before tech inspection opened. The variety of machinery present was staggering. Everything from heavily modified Studebaker Hawks to vintage Honda cubs was being rolled out, tweaked, and coaxed to life. The ingenuity extended to the support vehicles as well. Right beside the massive campers attached to two-story car trailers were school buses converted to motor homes. The racers were just as diverse!

Tech inspection opened before lunch and my bike went through without too many problems. Besides having to redo the lock-wires on all the screws, it passed with flying colors. I spent the afternoon performing final touch-ups and attended the drivers meeting and track inspection at 5:00 p.m. It wasn't until we all drove the length of the runway that I gained an appreciation for its sheer size. I never imagined that an area so large, flat, and empty could exist. You cannot understand it unless you see it in person; however, I'm sure it doesn't compare to the Bonneville Salt Flats.

Saturday was the first race day, and once again we learned that it is impossible to be first in line unless you spend the night. Arriving at 7:30AM, there were at least 40 vehicles ahead of us. Unfortunately, there was a persistent headwind all day that impacted the times.

The first run was a disappointment. No matter what I did or how small I made myself against the wind, it could only manage a 42 mph pass. The headwind clearly played a significant role because I could hit 50 mph in the return lane with the wind to my back. However, according to the math, the bike should have been able to attain 55 mph with its current gearing. I returned to the pit to find the problem and try to squeeze the extra speed out. It wasn't until the bike was up on the lift that we discovered that the front disc brakes were severely dragging, so I decided to put the machine on a major diet and try again.

Within an hour, I had removed the brakes, master cylinder, front fender, taillights, and whatever other small parts weren't required by the rules. As a result, the top speed on the next run immediately improved to 50.2 mph. By increasing the throttle stop and altering my riding position I was able to incrementally increase the top speed during every subsequent run. The final top speed, recorded during the last pass, was 56.535 mph. As of now, that speed stands as the official record for a 350cc non-streamlined motorcycle. I've already begun the modifications to improve on it next year.

Photo Credits: Daniel Falkenstrom

Editor's Note: Just joining this series? Then check out:

Setting a Land Speed Record

Setting a Land Speed Record: Preparation (Part 1) - Electrical

Setting a Land Speed Record: Preparation (Part 2) - Engine and Drivetrain

Setting a Land Speed Record: Preparation (Part 3) - Preparation

7 comments; last comment on 11/28/2011
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A DC Supply of Your Very Own

Posted November 01, 2011 7:00 AM

In a development that would brighten up Edison's day, DC power is getting its due. The Smart DC network developed by a UK company provides electricity for low-power DC electronics, such as computers, without inverters or AC/DC conversion losses. The system uses solar panels, batteries, and a smart hub and meter to allocate and store power for these applications. Is this an energy efficiency scheme you would support and install in your home?

The preceding article is a "sneak peek" from Alternative & Renewable Energy, a newsletter from GlobalSpec. To stay up-to-date and informed on industry trends, products, and technologies, subscribe to Alternative & Renewable Energy today.

7 comments; last comment on 11/09/2011
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