Dear Editor, EE Publishers
I am surprised at the negative tone expressed towards diversified energy, carbon emission caps and renewable energy by Dr Philip Lloyd in “An energy crisis or not?” (http://www.eepublishers.co.za/view.php?sid=22258).
Firstly, he expresses that “Diversity of energy resources is a luxury you can afford if you have enough.” But diversity is precisely what you need when you DONT have enough, to ensure that you spread the risk of betting on a single technology. The more diversity, the less risk of failure, the more you can build quickly
In terms of carbon, as the rest of the world seeks to tax carbon emissions, South Africa has two options – either to pursue the dirty energy option and become an international pariah, or commit to cleaning up its act, starting with a form of carbon tax. Morally and ethically, in the light of climate change, the first option is unpalatable.
For Renewables, he claims that “no one has yet figured out a way to produce renewable gigawatts of power on demand except by hydropower”. He neglects to mention that Concentrated Solar Power with storage can do this, not to mention that distributed wind can also act as baseload with a high level confidence. Coupling multiple Renewables together with a little pumped storage can indeed provide 100% baseload. I draw you attention to some work done by Stanford University showing how California could supply 100% of its power from Renewables (“Matching Hourly and Peak Demand by Combining Different Renewable Energy Sources, http://www.stanford.edu/group/efmh/jacobson/HosteFinalDraft.pdf). With a country as vast as ours with its abundant resources, it should be easier than for California!
But in reality, South Africa does not have a baseload problem – it has a peaking power problem. Again, CSP plants with storage would be ideal for this application, storing energy during the day and running as peaking plants on demand.
Dr Lloyd argues that we need to build coal power stations quickly, but we can roll out Renewables far faster than coal (2 years to build wind), and certainly many times faster than the other proposed alternative, Nuclear (20 years). Taking a lifecycle cost, the Renewables work out cheaper too, with less risks associated with long term fuel prices (for coal and uranium).
But the fastest way to create more capacity is by using less, and this is where Energy Efficiency could play a huge roll in South Africa. For too long our electricity has been too cheap, and we use it inefficiently. If we as a country were to drive a massive energy efficiency campaign, perhaps 100,000 jobs could be created, with a massive net boost to GDP, while alleviating for the short term any need for new power stations.
Thus it becomes quite clear that we can meet our energy needs quite quickly without reliance on coal. What is needed is the political will and foresight to see the benefits of Renewables while shunning the courtship of the current vested interests of coal and ESKOM.
Frank Spencer MSc(Eng) BPhil (Sus Dev)