Category Archives: Energy Storage

Intermittent wind, solar, and wave power can not replace fossil fuels and nuclear power electricity generation without energy storage

Vernon VG&E AB 2514 Energy storage report

STAFF REPORT: VERNON GAS & ELECTRIC DEPARTMENT   September 2, 2014 [some of the 25-page report is shown below as I attempted to get up to speed on energy storage. Since California is the first state to mandate this, and … Continue reading

Posted in Battery - Utility Scale | Comments Off on Vernon VG&E AB 2514 Energy storage report

Wind, solar, and storage impact on the California grid

California Energy commission. June 2010. Research evaluation of wind generation, solar generation, and storage impact on the California Grid. 131 pages. Excerpts: This report analyzes the effect of increasing renewable energy generation on California’s electricity system and assesses and quantifies … Continue reading

Posted in Energy Storage, Renewable Integration | Comments Off on Wind, solar, and storage impact on the California grid

Sacramento SMUD AB 2514 Energy storage report

[The state of California has realized that it’s unlikely a larger or national transmission grid will be built to share and balance variable renewable power, and is going to Plan B, energy storage. The problem is, all of the utilities … Continue reading

Posted in Battery - Utility Scale | Tagged , | Comments Off on Sacramento SMUD AB 2514 Energy storage report

Hydropower has a very low energy density

To store the energy contained in 1 gallon of gasoline requires over 55,000 gallons to be pumped up 726 feet (CCST 2012). As a thought experiment look at what it would take generate all of America’s 4,058 TWh electricity, where … Continue reading

Posted in Energy Storage, Hydropower, Pumped Hydro Storage (PHS) | Tagged , , , , | 1 Comment

CSP Barriers and Obstacles

Location must be in the desert Southwest Unlike solar PV, CSP can’t cope with humidity or cloud cover, so it is limited to the southwest were the solar irradiation is high and there is no dust, haze, or smog.  Solar … Continue reading

Posted in CSP with thermal energy storage | Tagged , , , , , | Comments Off on CSP Barriers and Obstacles

CSP with thermal energy storage is seasonal, so it can not balance variable power or contribute much power for half the year

Concentrated Solar Power not only needs lots of sunshine, but no humidity, clouds, dust, smog or or anything else that can scatter the sun’s rays.  Above 35 degrees latitude north or south, the sun’s rays have to pass through too … Continue reading

Posted in Concentrated Solar Power, CSP with thermal energy storage, Grid instability, Seasonal Variation | Tagged , , , , , | Comments Off on CSP with thermal energy storage is seasonal, so it can not balance variable power or contribute much power for half the year

Solar Thermal ESOI (Energy Stored on Invested)

Barton, N. April 17, 2013. ESOI for solar thermal. http://sunoba.blogspot.com/2013/04/esoi-for-solar-thermal.html Published information is available to evaluate the ESOI score for the most common solar thermal storage technology – a molten 60-40 mixture of sodium and potassium nitrates, commonly known as … Continue reading

Posted in Concentrated Solar Power, Energy Storage | Tagged , , , | Comments Off on Solar Thermal ESOI (Energy Stored on Invested)

Inage: calculate storage for short-term wind variation

Inage, S. 2009. Prospects for Large-Scale Energy Storage in Decarbonized Power Grid. International Energy Agency. This paper limits itself to the issue of frequency stability in systems with increasing shares of variable renewable generation assets (wind power in Western Europe … Continue reading

Posted in Research | Comments Off on Inage: calculate storage for short-term wind variation

Compressed air energy storage (CAES)

Besides pumped hydro, CAES is the only other commercially proven energy storage technology that can provide large-scale (over 100 MW) energy storage. How it works: Using off-peak electricity, compressed air is pumped into very large underground cavities at a depth … Continue reading

Posted in CAES Compressed Air | Tagged , , , , | Comments Off on Compressed air energy storage (CAES)