15/11/2014

Hi KSA participation in The Big 5 rises 75 %, with 100 companies participating in KSA pavilion organized by Saudi Exports.

Hi KSA participation in The Big 5 rises 75 %, with 100 companies participating in KSA pavilion organized by Saudi Exports.

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Organized by Saudi Export Development Authority (Saudi Exports), the KSA pavilion in The Big 5, the largest construction exhibition in the Middle East to be held in Dubai from 17 – 20 November, 2014, will see the largest number of Saudi companies – a total of 100 companies – in the show’s Saudi pavilion. This represents an increase of 75 per cent over the previous edition when only 27 companies took part.
The Big 5 is the largest construction exhibition in the Middle East, serving as a networking platform for construction product suppliers and buyers to be held in Dubai Exhibition and Convention Centre.
Saudi Exports Secretary-General, Mr. Ahmed bin Abdul Aziz Alhaqbani, said the authority’s participation in “The Big 5 Dubai 2014” exhibition for contracting sector and building materials was part of the preliminary phase of Saudi Exports. He added that the pavilion will feature Saudi products that are competing to increase their footprint in the global construction markets.
Alhaqbani said that the Saudi economy and the private sector were making rapid strides and Saudi Exports was contributing by providing services to companies and organizations which will pay dividends to the economy.
Alhaqbani added that Saudi Authority strives to offer value additions to Saudi manufacturers. “We work in synergy with manufacturers and government departments to attain the broader goal of boosting the economy.”
The Big 5 comes at a time when the Gulf region in general and KSA in particular are witnessing economic and construction boom.

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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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