Category Archives: Renewable Research

Georgetown Goes All In on Renewable Energy

Great news for the state of Texas, pushing forward in renewables and becoming a leader in the industry. I’m interested to see how other cities follow their example.

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ROB BENNETT/NYT

Workers from SunEdison, a large solar installer, putting a solar system on the roof of a Kohl’s store in Hillsborough, N.J., on Thursday, June 19, 2008. Georgetown is planning to become the first city in Texas powered entirely by renewable energy in a deal with solar developer SunEdison. (Rob Bennett/The New York Times)

Georgetown says it plans to be the first city in Texas entirely powered by renewable energy. The city’s electrical utility is planning to announce Wednesday that it is signing a deal with solar developer SunEdison for 150 megawatts of solar power beginning in 2016. Combined with a 2014 deal with wind developer EDF, the city of 54,000 north of Austin says it now has enough renewable power under contract to cover its customers’ entire electricity needs. As wind and solar farms proliferate around the United States, communities have slowly begun to commit to all-renewable power deals in what have been billed as a response to residents’ concern over the impact of carbon emissions on global warming. On its website, the U.S. Environmental Protection Agency lists 12 municipalities that have made commitments to 100 percent renewable power. Some, like Burlington, Vt., have already achieved the goal. Others have a longer-term view. San Diego is not planning on reaching 100 percent until 2035. “We have not found another municipal utility in the state or in the South doing this,” Georgetown spokesman Keith Hutchinson said. In Texas, most cities do not have their own utilities, leaving residents to buy their electricity from any number of retailers, including those that promise 100 percent renewable energy. Besides Georgetown, exceptions include Austin, Garland and San Antonio. Georgetown officials said the switch to renewables was more about cost than the environment. The deal with SunEdison delivers electricity at a lower rate than the city now pays, meaning no rate increase. And the contract runs through 2041, offering protection against spikes in electricity prices. “When Georgetown Utility Systems opted to seek new sources of power in 2012, we were charged with a mission to secure the most cost-effective energy that balanced risk and reward,” interim city manager Jim Briggs said in a prepared statement. In Georgetown, the cost of 1,000 kilowatt hours of electricity runs $114 a month. That is $5 less than the average Texas customer pays, according to federal data. EDF’s 194-megawatt Spinning Spur 3 wind farm is already under construction 50 miles west of Amarillo. It is scheduled to begin delivering electricity to Georgetown next year. SunEdison said it expects to begin construction soon on a series of solar farms in West Texas that will connect to the grid in 2016.
Follow James Osborne on Twitter at @osborneja.

Battery Storage Needed to Expand Renewable Energy

The U.S. Department of Energy is exploring energy storage strategies to accelerate the use of wind and solar power
My thoughts:
2/13/2015
There are two types of batteries discussed in this article: aluminum-air and flow batteries. Aluminum air batteries produce electricity from the reaction of O2 in the air with aluminum, they also have the highest density of all batteries. The issue with these are that they are non-rechargeable once the aluminum anode is consumed with the O2 in the air at its water immersed cathode, it forms aluminum oxide. At this point producing electricity is no longer possible. This battery can be mechanically recharged by replacing the aluminum anodes and recycling they old hydrated aluminum oxide. uses for these batteries are mainly with electric vehicles. since it gives 8x the range vs a lithium ion battery
The other type of battery is a flow battery. This battery recharges by two chemical components such as hydrogen-lithium bromate, hydrogen-lithium chlorate, or iron-tin are dissolved in liquids inside of a system which is separated by a membrane. In comparison to the aluminum-air battery the flow battery has the advantage of instantly being recharged. (http://energystorage.org/energy-storage/storage-technology-comparisons/flow-batteries). The downfall with the flow battery is needed materials like energy-dense electrolytes and ion exchange membranes are expensive.
Last year I read an article regarding molten air batteries, which seem to have the advantage of a higher density vs. lithium ion, cost effectiveness and rechargability, which is the best of both the aluminum ion and the flow batteries. (http://nsf.gov/discoveries/disc_summ.jsp?cntn_id=131828&org=NSF) Could this option be a more viable option than the aluminum air batteries?

Researchers design bionic leaf capable of converting sunlight into liquid fuel

Artificial leaf created waves in the world of biology and renewable energy the moment it was announced by Daniel Nocera back in 2011 and his latest research involves utilising hydrogen from this artificial leaf, carbon dioxide from another source and feeding it to bacterium Ralstonia eutropha to create liquid fuel.

via Researchers design bionic leaf capable of converting sunlight into liquid fuel.

My Thoughts:

2/11/2015 I found this article interesting because, it focuses on capturing the energy from sunlight and turning it into a use-able fuel using plants as the common material. The goal is to take solar photons and efficiently convert into fuel from carbon dioxide and water using an artificial photosynthesis system, similar to the natural photosynthesis green plants have produced for millions of years. Artificial photosynthesis offers a non carbon producing option that will not contribute to global warming issue we have as a result of oil and coal. Unfortunately one of the drawbacks is that the artificial leaf makes hydrogen and the current infrastructure of the United States is not in place to use this excess hydrogen. There is a possibility of it being used on hydrogen ran vehicles but these vehicles are not widely used. Could there be a possibility of setting up an artificial leaf system near or at gas stations and have the excess hydrogen provided at an extremely discounted rate versus fuel? Maybe this could increase the production of hydrogen fueled vehicles? But how would the energy captured be stored when sunlight is not available? Could it be stored as hydrogen, and then when in use combining it with carbon dioxide to produce the alcohol fuel?

There are so many challenges that need to be thoroughly researched before the artificial leaf is implemented but should be a direction that researchers keep moving towards. I will continue to stay up to date on developments and update my post.