Tag: solar power

Unstoppable waves of innovation in the Waikato?

A pleasant surprise this morning to see across the front page of the Waikato Times the headline “Waikato’s plan to harvest sunlight”.  The article reports that lines company WEL Networks has been evaluating photovoltaic cells and is now investigating the feasibility of solar power production in the Waikato region.

Commercial viability is the determining factor. It’s the dramatic fall in the cost of photovoltaic cells which has caused WEL Network’s investigation. CEO Julian Elder said that the low price of the cells, compared with where they were a few months ago, made solar power stations affordable in New Zealand. He said that in the space of a few months the return on investment had gone from about half a century to under 10 years.

We are looking at the whole range, from 1-2 kilowatt units on a house, up to the thousands of kilowatts for a large-scale pilot,” Dr Elder said.

He said it was not a case of if they built such power stations but a matter of when.

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Europe’s renewable power continues to increase

Some encouraging renewable energy news in a recent press release from the European Wind Energy Association.  Their analysis of the 27 National Renewable Energy Action Plans shows that the EU-27 will meet 20.7 % of its 2020 energy consumption from renewables, exceeding the 20% target.

The National Action Plans show that one third (34%) of EU electricity demand will be supplied from renewables by 2020. Wind energy will be the largest contributor, generating 14% of Europe’s total electricity demand in 2020 (494 TWh from 213 GW installed capacity). Other renewables are expected to contribute as follows: 10.5% from hydro, 6.6% from biomass, 2.4% from solar photovoltaic, 0.5% from CSP, 0.3% from geothermal and 0.1% from ocean. Continue reading “Europe’s renewable power continues to increase”

What Will Work

Kristin Shrader-Frechette of the University of Notre Dame is rigorous in the presentation of her argument in What Will Work: Fighting Climate Change with Renewable Energy, Not Nuclear Power. In recent times a number of leading environmentalists have concluded nuclear power has to be employed to enable the transition away from fossil fuels. Shrader-Frechette disagrees. There is no “devil’s choice” between expanding nuclear fission and enduring climate change. Nuclear power is not needed, and it’s certainly not desirable.

Not that the author in any way downplays the need to give up the use of fossil fuels. She fully accepts the science of climate change and what is needed to avoid climate-related catastrophe. Objections to taking action are listed in detail and briskly dismissed. The people who deny climate change for profit are categorised and exposed for their role in misleading the public. Among them, sadly, are the American politicians who repay campaign fund donations from fossil-fuel companies by denying or delaying climate change issues.

But Shrader-Frechette rejects the argument that nuclear power is necessary in the energy mix if we are to address climate change quickly enough to be effective. A substantial part of the book is devoted to showing that nuclear energy is not only undesirable but also diverts much-needed investment and government subsidy from energy efficiency and renewable energy development. Far from being part of the solution it gets in the way of solution.

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The Climate Show #23: Durban and the return of the electric car

Grab some holly, deck your halls, heat up some mince pies, and then settle down to the last Climate Show of 2011. We look at the outcome of the Durban conference, discuss heavy rain in New Zealand and record-breaking weather extremes in the USA, and ponder the implications of news of more methane erupting from the seabed off Siberia. Glenn interviews Chris Paine, director of EV documentary Revenge of the Electric Car, and we round off the show with some optimistic news on possible energy solutions.

Watch The Climate Show on our Youtube channel, subscribe to the podcast via iTunes, listen to us via Stitcher on your smartphone or listen direct/download from the link below the fold…

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Powerman: solar PV, net metering and seeing the light in New Zealand

Grid tie solar power is becoming a no-brainer! Photovoltaic (PV) solar power generation has made enormous advances over just the last two years. The cost of panels and assorted gear has fallen dramatically so that in NZ grid tie solar systems in the 2KW peak power range can be purchased for under NZ$10,000 (including GST) from many outfits.

Grid tie PV systems, to make sure its clear what I mean here, are systems consisting of a set of solar panels, often 10 panels of 190W and 45 Volts each, and a grid tie inverter which feeds the solar power into the 240V mains system at your home.

Once installed the power that is generated by the rooftop panels feeds into the 240V mains system. Power required by the home is then derived from this source. If the requirements of the home exceed what’s generated, additional power flows in from the mains and your power meter runs forward as usual. But if your home requires less energy than the panels are generating, often the case on a sunny day, the excess power is fed into the grid and your meter runs backwards, or so it should. More about this below.

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