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Showing posts with label PV. Show all posts
Showing posts with label PV. Show all posts

Saturday, May 2, 2015

Tesla Battery launch a revolutionary #energy solution for #climate


This article was originally published at San Fransisco Bay Area Indymedia and at nofibs.com.au.

In a remarkable 20 minute presentation on Thursday night, Elon Musk, the billionaire founder of Paypal and Tesla Motors, launched a scalable battery storage system aimed at multiple markets: from personal home use, small business to utility scale electricity storage.

It is the missing jigsaw piece to the solar and renewables revolution already under way in replacing fossil fuel power generation. Elon Musk outlined the critical problem of climate change and greenhouse gas emissions from an ageing fossil fuel infrastructure, explained how it can be addressed, and launched an innovative product that could plausibly make a substantial contribution as a solution.

One of the traditional arguments against a high level of renewables in our electricity grid has been the need for constant baseload power that needs to be provided by coal, gas peaking turbines, or nuclear. This argument was always false, as several reports have shown (Rocky Mountains Institute at Clean Technica, Mark Diesendorf at The Conversation, Dr David Mills at ABC Science), but nevertheless it provided a powerful, if faulty argument for maintaining our aging fossil fuel generation capacity.

Our energy grid is built upon generating power constantly to meet the demand at any particular point in time. Variable sources of energy such as wind and solar have been steadily growing as a proportion of grid supply, but studies have shown that network demand has a lot of natural variability anyway. Both wind and solar generation are able to be forecast over short day-length or so periods, and thus managed as part of the normal regulation of grid demand and response. Relatively cheap energy storage will enable some fine network adjustment to power output, while aiding in decentralisation of power generation and storage. It adds a missing piece of the puzzle which aids in transitioning to a 100 per cent renewables energy system.

Thursday, April 30, 2015

Seventy Five percent of heatwaves now attributed to climate change


The original of this article was published at nofibs.com.au

The latest study of extreme weather events has concluded that 3 out of 4 heatwaves and extreme heat events and nearly one in five heavy rainfall events, on a global scale, can be attributed to human contributions to global warming through greenhouse gas emissions. As temperatures continue to rise, the percentage is set to increase even further.

The researchers looked at 'moderate' extremes, which they defined as events expected to occur on 1 in every 1,000 days under present conditions. It involved examining data on extreme weather events around the globe in a dataset going back more than 100 years, and using two dozen climate models.

There has been a growing ability to attribute some single extreme weather events via Fractional Attribution of Risk (FAR) to anthropogenic climate change. Some of the specific individual extreme heatwave and precipitation events that have directly been attributed include the flood risk in England and Wales in autumn 2000 (Pall et al 2013), the European heatwave of 2003 (Stott et al 2004), the 2010 Russian heat wave (Otto et al 2012), and Australia’s record summer temperatures of 2013 (Lewis and Karoly 2013).

This study, rather than looking at individual events, examined the change in extreme weather events on a global scale for the statistical attribution to climate change.

Wednesday, April 15, 2015

Moreland roofs now generate 12MWh power annually from Solar PV


This article was originally published at Climate Action Moreland.

Moreland City Council has just installed an extra 100kW of solar PV panels - 390 new panels in all - on the Coburg Civic Centre roof. This adds to the existing 9kW system that was already functioning.

These panels will meet 30 per cent of the building's energy needs, as well as saving 160 tonnes of greenhouse gases every year, with an estimated saving of $23,000 from Council's electricity bill each year,

Read more at MEFL: Coburg Town Hall gets solar-powered.

We think this is great news. Keep up the good work City of Moreland in transitioning to zero net emissions.

Sunday, December 29, 2013

India innovating with solar PV, poised to become a global solar leader

Yesterday I saw an image shared on my Facebook timeline. It was of solar PV panels installed over an irrigation canal in India. This has the obvious advantage of a double impact for sustainability. Low carbon power is generated by the panels feeding into the transmission grid, and the panels shade the water in the irrigation canal reducing evaporation loss thus saving a scarce resource used for drinking and agriculture.

I googled for more information and posted the image in a tweet. This has become one of my most popular tweets to date, obviously striking a responsive nerve.

Thursday, December 12, 2013

Solar PV Panel installations in Fawkner exceed 5 per cent of dwellings

In my travels around the internet I found this site put together by the Australian PV Institute showing the level of installation of solar photovoltaic panel installation by postcode or Local Government area.

In Fawkner there have been about 246 solar PV installations. This amounts to approximately 5.4% of the estimated 4520 dwellings in our suburb with an installed capacity of 571kW.

This is lower than the Moreland average of 6.1%. Moreland Local Government Area (LGA) and is also below other municipal areas in Melbourne's north. Maribyrnong has 7% solar installation, Moonee Valley is on 6.5%, Darebin is on 6.9%, Banyule on 6.7%, Whittlesea on 9.7%, and Hume on 11%.

Friday, July 30, 2010

Pioneering Solar Photovoltaic Centre of Excellence loses research funding

Why is a ground breaking solar research facility losing research funding at such a crucial time for transitioning from coal fired power stations to renewable energy? On Monday 26 July Greens staffer Tim Hollo revealed on Twitter that research funding had not been renewed for the Australian Research Council Centre of Excellence for Advanced Silicon Photovoltaics and Photonics based at the University of NSW.

Action on climate change is hot topic this election despite the Labor, Liberal and National Parties largely ineffectiual policies and minimal target of just 5 per cent emissions reduction by 2020. While an early carbon price would provide business investment certainty, structural support to renewable energy technologies is also important. The scientific consensus is that we need to implement at the minimum 20 to 40 per cent emissions reduction by 2020, and preferably the upper end of that range, if we are to stand a reasonable chance of avoiding dangerous climate change.

The inaction of Labor and Liberal parties on the Federal level was further highlighted this week with Victorian Labor Premier John Brumby's announcement of a 20 per cent emissions reduction target by 2020 for Victoria, and 5 per cent of electricity to be produced from large scale concentrating solar thermal power stations, as well as support for residential and medium scale solar photovoltaic systems. The comprehensive program also includes phasing out 25 per cent of Hazelwood by 2014, increasing passive building energy efficiency and a local carbon offset program.

Brumby is keen to position Victoria as the solar capital of Australia, and is driven by the prospect of a state election towards the end of 2010 with the Greens challenging Labor in a few inner city electorates. At the very least he is showing some leadership on much needed climate action in contrast to the political football the issue is seen as in Federal politics.


Photovoltaic reserach funding cut


According to the 2003 ARC funding report the Advanced Silicon Photovoltaics and Photonics COE was funded for just over $12 million for seven years. This year funding had been requested for a further seven years starting 2011 from the Australian Research Council. The 2003 funding proposal describes "Australia has been a large player in photovoltaics as a manufacturer, end-user, and source of new technology and, with appropriate nurturing, it is not impossible that Australia could reach a world-dominant commercial position in photovoltaics comparable to Denmark's 50% presence in the world wind generator market."

John Grimes, chief executive of the Australian Solar Energy Society (AuSES) told Recharge in this report "It was recently announced that ARC funding did not include the centre because it is 'not successful' and no (other) reasons were given,"

"The centre has met or exceeded all funding milestones. It has been a world leader in PV research, constantly holding PV efficiency records - single cells of 25% and multi cells of 43%." said Grimes.

According to Grimes significant private sector investment was leveraged from the ARC grant. Some doubt now exists whether private investment will continue to the same extent. ARC funding is due to end at the end of 2010.


PV Research Highlights


So what are some of the highlights of the Australian Research Council Centre of Excellence for Advanced Silicon Photovoltaics and Photonics? The ARC Photovoltaics Centre of Excellence 2009 annual report describes some of their ground-breaking work:


"Most present photovoltaic sales are of "first-generation" solar cells made from silicon wafers, similar to the wafers used in microelectronics. The Centre's world-leadership with these "first-generation" devices, with international records for the highest-performing silicon cells in most major categories (including the outright highest-performing cells and modules) was extended in 2008 with the demonstration of the first 25% efficient silicon solar cell. In 2009, a first-generation Centre cell of this type was key to establishing a new world record of 43% for the conversion of sunlight to electricity by any means. First-generation Centre research addresses the dual challenges of reducing cost and further improving efficiency. The rapid growth of the photovoltaic industry is generating widespread interest in ongoing innovations of the Centre's first generation technology with several distinct technologies now in large-scale production and additional licences signed during 2009. A notable achievement during 2009 was the introduction of high-efficiency Pluto technology, co-developed with Suntech Power, the world's largest silicon cell manufacturer, onto the market in large volumes."


The Centre of Excellence have also been developing second generation photovoltaics where a very thin solicon layer is deposited on glass providing enormous potential cost savings. "The Centre is at the forefront of international research with such "second-generation", silicon based approaches, with the first commercial product from "spin-off", CSG Solar, appearing on the market in 2006. Several megawatt fields of CSG Solar panels are now operating in Europe. During 2009, with support from an Australian Research Council Linkage Grant, collaborative work commenced with CSG Solar Pty Ltd aimed at further reducing the costs of this approach." says the annual report.

While Julia Gillard promised investments of $892 million over ten years to promote the use of renewable energy sources last Friday, on Monday the Photovoltaics Centre of Excellence found out their funding by the Australian Research Council had not been renewed past 2010.

So instead of continuing funding some of the pioneering research into solar photovoltaics for a really quite small sum, we get instead the Labor party 'Cash for Clunkers' policy - a scheme that will provide owners of pre-1995 cars a rebate of $2,000 if they upgrade to a new more fuel efficient model. To fund this upgrade to vehicle fuel efficiency the solar flagship program will lose $220 million and a further $150 million will come from closing the solar hot water rebate.

The lack of transparency in the bureacratic decision not to continue research funding is of great concern. Is it any wonder that some of Australia's foremost reserachers in solar and renewable technologies end up moving overseas to further their careers and research in more responsive environments.



Image of Solar Panels by pixor from flickr used under Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Generic licence