Thursday, October 11, 2012

Powering half the world with Wind by 2030

Is it possible? Will nations with good wind potential (and those with money) go for it?

In 2011, nearly 200,000 wind turbines around the world met 2.5% of global energy needs. But according to RenewableEnergyWorld, new study tells that there is every possibility that wind could power half the world with clean energy by 2030. That is pretty impressive.

Giant wind-turbine blades belong to GE Energy Financial Services. Photo: GE


Wind power fast growing

Wind power is now the fastest-growing and one of the cheapest renewable energy sources, and in last year 40.5 GW of new wind power was brought on line, bringing the global total capacity up to 238 GW. This is translated into offsetting over 600 million tons of carbon dioxide annually.

Researchers estimated that 4 million 5MW turbines operating at a height of 100 meters could provide over 7.5 TW of power, at no risk to the environment. This is more than half of our energy needs (which is estd. 5.75 TW) in 2030.


Wind power is the least damaging option

The research team is confident that of all the sources of energy, wind is one of the sources of energy with the least environmental impact. Energy from wind would come from the mixture of onshore and offshore wind turbine, with offshore likely to be more important to the future of wind due to several advantages:
  • It’s right there on the coasts, where the people are. Hence lower cost to install,
  • Offshore wind tends to peak in the afternoon, which is when people peak with demand for electricity,
  • Offshore sites tend to be windier than onshore sites.


Wind turbines are expensive now but at the rate technology is advancing today, it would not be too far-fetched to think about 'affordability' in the near future.

TheGreenMechanics: No doubt, offshore wind turbines are less expensive in a long run, but with gigantic 100m high unsightly poles in waters near you, you'd be in for a less than desirable sea view. Of course you have to compromise a thing or two to get clean energy.


Further readings, please go to: RenewableEnergyWorld

Monday, October 8, 2012

Why do we see only one side of the moon

Do you enjoy the sight of full moon? Then you may want to read on.

moonlighting by JDFloydPictures
Copyrighted by TheGreenMechanics


Actually it's not just 'half' or one side of the moon. A little googling and you'd find that due to slight changes called libration, we can see slightly more than half of the moon over the time of its orbit. Look at the two shots below (I took them in Penampang Sabah, Malaysia) on two different times and they will give you some idea.

full moon
End of year shot of the full moon


Moon full on July14-2011 -800
Full moon shot taken in Penampang, Sabah


So, why only one side?

The time taken for the Moon to spin on its axis is almost exactly the same as the time it takes to orbit the Earth. Hence, the Moon always keeps the same side pointing our way.

According to Sciencefocus, this is not a coincidence as over many years, the Earth’s gravity has forced the Moon to spin synchronously with its orbit. However, things are a bit more complicated than that. Viewed from Earth, the Moon appears to rock slowly backwards and forwards so that we see a slightly different face throughout the lunar month.

There are two main reasons for this.
  • First, the Moon’s orbit around Earth is elliptical not circular so its rotation is sometimes ahead, and sometimes behind, its orbital motion. 
  • Second, the Moon’s rotation axis is not at right angles to its orbit around the Earth so we can sometimes see ‘over’ or ‘under’ its poles. 

Over time this means we actually get to see about 59% of the Moon’s surface. I have illustrated that in my two shots above. I have quite a collection of moon shots, I would probably share them here in future.


Facts source: Sciencefocus
Note: The pictures are my own.

Sunday, October 7, 2012

First in Asia? SL1M: The new improved LPG cylinder

"Mana ada berat..!"
Cool! Malaysia will become the first country in Asia to produce  composite Liquefied Petroleum Gas (LPG) cylinder.

Called the Silinder LPG 1Malaysia or SL1M, the cylinder is lighter at 4.7kg when empty, and cheaper.

In this picture (Daily Express): An elderly women carrying the SL1M cylinder to demonstrate its light-weightiness during the recent Sabah International Expo, SIE 2012 at Magellan Sutera Harbour in Kota Kinabalu. The LPG cylinders are developed by Faidhi Holdings Sdn Bhd


The new composite lightweight LPG cylinder

Commercial name        : Silinder LPG 1Malaysia or SL1M
Manufacturer                : Faidhi Holdings Sdn Bhd
Weight when empty      : as light as 4.7kg
Weight when filled        : min 11kg ( still less than half the weight of the current steel tank)
Construction material    : plastic & composite (fibre glass)
Special features           : lighter, cost-saving, explosion-proof, tracking chip
Lifespan                      : 25 years
Funding aid                  :RM5.8 million from the Domestic Trade, Cooperatives and Consumerism Ministry
                                    and the Science, Technology and Innovation Ministry
Launch date                : March 21, 2012
Availability                   : 1Q 2013 (Klang Valley/Peninsula Malaysia)
                                    March 2013 (Sabah/Labuan)


Heavy back-breaking cylinder no more

Because it is made of lightweight composite material, it will be very light (although 'very' can be misleading at times) and children/housewives can conveniently bring them up to, say, an apartment on the 2nd floor. I understand there are many variations in weight but the latest that we heard is the 4.7kg tare weight. At launching the press were told of 7kg and 10kg variants.

Note: Pictures are image grabs from NTV7's clip of the launching back in March 2012:



Few variants of the SL1M

Source: NTV7


To be made available in Sabah in March 2013, the sole distributor Arokris Sdn Bhd is expecting a first batch of about 30,000 SL1M cylinders to be marketed in the state. The bottling will be done at the company's plant near Kota Kinabalu. The 4.7kg variant when filled with LPG would weight about 11kg.

The safety features are recognised and verified by the international standard safety certification. The cylinders will also be embedded with smart card making them traceable anywhere in the world.

TheGreenMechanics: This in not exactly a new invention as similar products have been used in the developed nations. But the innovation and value added features makes this an interesting consumer product. Credit must be given when it is due. This would be suitable for many activities such as camping, fishing, farmers staying overnight at their barns as well as domestic and industrial use.


Sources: Berita Harian 21/3/2012, 1Malaysia.com portal and Daily Express 2/10/2012.