Category Archives: Solar

Can concentrated solar power be used to generate industrial process heat?

Preface. The bright future of solar thermal powered factories, makes some important points about using concentrated solar power to generate heat: “…A large share of energy consumed worldwide is by heat. Cooking, space heating and water heating dominate domestic energy … Continue reading

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Concentrated Solar Power can only exist in deserts and use too much water

What follows is my summary of: Bracken, N., et al. 2015. Concentrating solar power and water issues in the U.S. Southwest. U.S. department of energy, National renewable energy lab. Alice Friedemann   www.energyskeptic.com  author of “When Trucks Stop Running: Energy and … Continue reading

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Why solar power can’t save us from the coming energy crisis

Preface. Embedded within the posts below are many reasons why solar electricity can’t replace fossil fuels.  All solar and wind do is add to the giant fire of burning fossil fuels with just a tiny bit more power, about 4% … Continue reading

Posted in Alternative Energy, CSP with thermal energy storage, Solar, Solar EROI | Tagged , , , | 1 Comment

Pedro Prieto: many solar panels won’t last 25-30 years, EROI may be negative

Preface. Pedro Prieto and Charles Hall wrote the definitive book on the EROI of solar power, “Spain’s Photovoltaic Revolution. The Energy Return on Investment” and has built many commercial facilities himself and witnessed the failure of solar panels long before … Continue reading

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Challenges to the Integration of Renewable Resources at High System Penetration

Preface.  This overview of challenges for wind and solar written in 2010 is still true today. We are far from being able to reach even a 50% renewable grid (excluding hydropower from the total) given the lack of storage, the … Continue reading

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Why Concentrated Solar Power is not a good choice for a 100% Renewable Energy System

Preface.  The authors conclude that: In light of the obtained results — a low capacity factor and Energy Returned on Invested, an intensive use of materials—some scarce, and the significant seasonal intermittence) — the potential contribution of current CSP technologies … Continue reading

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Solar PV requires too much land to replace fossils

Preface. This is a brief summary of the Capellan-Perez paper that calculates the land needed to use solar to replace electricity as well as the land needed if solar were to replace all of societies use of energy (i.e. transportation, … Continue reading

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Renewable EROI must include storage, low capacity factor, wide boundaries

[ Trainer argues that when you consider how the capacity factor of wind and solar are to fossil plants, seasonality of wind and solar the number of facilities is quite large to deal with the intermittency problem.  Therefore the storage … Continue reading

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Richard Heinberg: Paul Krugman’s Errors and Omissions

Preface. This article by Richard Heinberg at Postcarbon refutes a column by Paul Krugmen called “Errors and Emissions Could Fighting Global Warming Be Cheap and Free?” here.  Most of my friends and family think I’m nuts because articles like this … Continue reading

Posted in EROEI Energy Returned on Energy Invested, Richard Heinberg, Solar, Wind | Tagged , , , , , , | 8 Comments

Want to go off-grid? You might need hundreds of Tesla batteries

Preface. Although you may not be as far north as Victoria, British Columbia (48.4 latitude), you’d ideally want to be at 30 degrees or less latitude from the equator to even consider the expense of off-grid solar power.  And even … Continue reading

Posted in Batteries, Photovoltaic Solar | Tagged , , | 11 Comments