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Friday, October 17, 2014

Ghana’s economy will accelerate by 8 9 in 2012 – African Dev’t Bank

Page last updated at Wednesday, February 8, 2012 18:18 PM // Leave Your Comment

Marie-Laure Akin-Olugbade - AfDBs Country Representative in Ghana

The African Development Bank (AfDB) is forecasting that the Ghanaian economy will grow between 8-9 percent by end of 2012.

“The economy will grow between 8 and 9 percent in 2012,” Marie-Laurie Akin-Olugbade, the AfDB’s Resident Representative in Ghana told ghanabusinessnews.com in an interview at the Euromoney Conference in Accra February 7, 2012.

According Akin-Olugbade, the Bank agrees with the 9 percent growth target set by the Ghana government for 2012.

The Ghana government according to its 2012 budget is targeting a “real non-oil GDP growth of 7.6 percent; real overall GDP growth of 9.4 percent” with an average inflation of 8.7 percent as well as a gross international reserve of not less than three months of import cover for goods and services for the year 2012.

“We don’t have any significant departure from what the consensus seems to be 8-9 percent. Yes I think it will be around that level and we agree,” said Akin-Olugbade.

South African-based bank, the Standard Bank Group also says Ghana’s economic growth will ease to 8.25 percent by the end of 2012.

“Broadly due to our larger base influence, we see growth easing to around 8.25 percent year-on-year,” said the Group in its African Markets Revealed report released January 19, 2012.

The Ghana Statistical Service (GSS) in October 2011 estimated that the economy will grow 13.6 percent in 2011 as compared to the growth of 7.7 percent in 2010 but Standard Bank says in its report “We see growth moderating to an annual average of 16.3 percent y/y in 2011, which is still above the government’s budget estimate of 13.6 percent y/y.”

Ghana’s unadjusted gross domestic product (GDP) growth has declined to 12 percent year-on-year in the third quarter of 2011 from the revised 17.6 percent figure recorded in the second quarter of 2011, the GSS said on Wednesday January 25, 2012.

By Ekow Quandzie

Friday, September 26, 2014

LEDs will slash energy use for lighting by 95

RNE has a look at the energy efficiency revolution in lighting - LEDs will slash energy use for lighting by 95%.

A simple (but not perfect) measure for lighting efficiency is the number of lumens (a measure of light intensity) a lighting source produces per watt. A conventional incandescent bulb gets 13 lumens per watt to light your room, while a replacement LED bulb from Philips that can be bought at Coles or Woolworths achieves 80 lumens per watt (a compact fluorescent globe gets about 60 lumens per watt).
CREE (the industry leader who, it is speculated, may purchase the next best, Philips’ Lumileds division) has successfully demonstrated Light Emitting Diodes running at 300 Lumens per watt in the lab. CREE currently sell a $10, 9.5W bulb (available in the US), which produces 85 Lumens per watt and can directly replace an old style 60W globe.
Other breakthroughs and innovations are contributing to achieving higher efficiency’s in LED lighting, including a breakthrough by German researchers which will not only effect LED lights, but laptop and mobile phone chargers, cutting losses in today’s most efficient power supplies by half from 10% to just 5%.
Taking all this into consideration, according to the US Department of Energy SSL (Solid State Lighting) program http://energy.gov/eere/ssl/solid-state-lighting we should be able to achieve wall plug efficiencies of 250 Lumens per watt by 2020 which means that a conventional bulb replacement in 2020 would be available using only a third of the electricity of today’s LED bulbs.
At that staggering rate of 250 lumens per watt, it will only take 3W to light a room, when it used to be done with 60 Watts of power. This represents a 95% reduction in energy required for lighting.
This will have a profound effect on the world’s requirement for lighting energy. We can expect - on an absolute basis – that 19% of the world’s electricity which is currently used for lighting to dramatically drop by at least 75%. On today’s numbers the reduction is the equivalent of the entire electricity consumption of the European Union.
In developed nations these huge efficiency gains from LEDs in the lighting sector will contribute to the continuing restructure of the electricity supply industry, which is currently facing a death spiral unless it can electrify the remaining residential energy services coming from fossil gas and supply a fast tracked electrification of the world’s vehicle fleet.
In developing countries, rooms that can be lit with 3W and task lights with even lower electricity consumption. This means that almost all the remaining 1.5Billion of the world’s population without an electricity supply will be able to access one at very minimal marginal cost in the next 5 years.

Sunday, September 7, 2014

Carnival of Mathematics will be here on April 6

Yes, right here on Friday, April 6. This is your personal invitation to suggest blog posts on mathematics at any level – your own or someone elses you especially liked. Posts on theoretical computer science or mathematics in other sciences are also welcome.

For more information, see here.

To contribute, just send me a note here: carnival AT scienceandreason.net. Please put "Carnival of Mathematics" in the Subject line, and respond by 6PM PDT on April 5. You can also use this form.

Even if you have nothing to submit, check back here April 6 to see what bloggy mathematicians are up to.

Tags: Carnival of Mathematics