15/11/2014

Hi ‘The UAE has nothing to worry about’!.

Hi ‘The UAE has nothing to worry about’!.


At just two per cent, the UAE has one of the lowest inflation levels in the world, says the country’s Minister of Economy.
Speaking to the media on the sidelines of the Summit on the Global Agenda in Dubai, Sultan bin Saeed Al Mansoori, UAE Minister of Economy, says that the country has been successful in controlling the prices of commodities on its territories.
He underlined the importance of the World Economic Forum’s summit in Dubai, saying that approximately 80 senior government officials were attending the conference held at Madinat Jumeirah.
When asked about the oil prices, Al Mansoori says the UAE has nothing to worry about, as the crude oil prices are still not low enough to affect the country’s budget. “The diversification of the UAE economy in the past few years means that oil prices do not directly affect the economic dynamics of the country. The Emirates has taken pertinent steps to move away from the reliance on oil revenues.”
Diversification of economies in the GCC region is the best way to move forward and avoid any negative effects of the oil price fluctuations, he says.
On foreign investment coming into the UAE, the minister says it is accelerating. With open market policies, “foreign investment in the UAE is set to rise by 10.5 per cent annually.”
More than 1,000 experts from all over the world are attending the Summit on the Global Agenda is Dubai, which will conclude on November 11.
By Atique Naqvi

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Hi Green Tip #4: Hi Size and Select Fans Near Their Peak Total Efficiency.

Even the most efficient fan models can operate inefficiently if improperly sized.Fans selected close to their peak total efficiency (pTE) will use less energy. The 2012 International Green Construction Code requires selections within 10% of peak efficiency, and ASHRAE Standard 90.1,

Energy Standard for Buildings Except Low-Rise Residential Buildings, is considering language that would require a 15% allowable range. If a fan is selected to operate more than 15 point below its peak efficiency, it is probably undersized to result in the lowest purchase price (first cost). The smaller, less-expense fan will have to run much faster with higher levels of internal turbulence than its larger cousin to meet the required air flow, thus consuming a lot more energy.The cost difference to select a larger fan closer to peak operating efficiency is very small when compared to the energy saved.

Simple payback for 10% selections is usually less than one year. Smaller fans operating faster will also require more maintenance and earlier replacement. Smaller fans generate more noise as well.Below is a table showing the output from a fan manufacturer's sizing and selection program. All of the fans in the table would "do the job" of providing the required airflow at the required pressure.

The fan sizes range from 18-inches in diameter to 36-in. Notice that as the fan diameter increases, the fan speed decreases, as does the fan power (expressed as "brake horsepower"). The red region of the table indicates poor fan selection practice - none of these fans have an actual total efficiency (at the airflow and pressure required) within 15 points of peak total efficiency. The green region indicates proper fan selection process - all have an actual total efficiency within 15 points of peak total efficiency.

Note that the 30-in. diameter fan consumes roughly half the power of the 18-in. fan. The lowest cost fan shown is probably the 20-in. fan, with an efficiency of 49%, 29 points off the peak. If this fan runs 6,000 hours per year at a utility rate of 10 cents per kwh, it will cost $4,300 a year to operate. A more efficient selection might be the 24-in. fan because it is "Class I" and complies with both ASHRAE 90.1 and the Green code requirements. It has an actual efficiency of 69%, 10 points less than the peak efficiency of 79%. This fan would cost $3,100 to operate, which is probably more than the fan itself costs. A more efficient 30 inch selection is only 1 point from its peak efficiency of 83% and will consume only $2,600 per year, saving $500 a year relative to a 24-in. fan, and $1,700 a year over the lowest cost fan. Generally, the difference in initial cost of the most efficient fan selection is paid back in less than 5 years over more common less efficient alternatives. Perhaps this observation will bring it home.

Most fans consume more each year in energy cost than they are worth. So, when you buy a fan, think of it as a liability, not an asset. Your objective should be to make the liability placed on those who will pay future energy bills as low as possible. The leverage implicit in choosing a larger, more efficient fan is much greater than most people appreciate. And fans last a long time – 20 years plus – so choose wisely.The bottom line is this. Right-sizing a fan can yield energy savings and generate a lot of operating cost savings for the facility owner or occupants for many, many years.

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