29/10/2014

Hi A Nation Today: Egypt - "We Really Have No Title For This."

Hi A Nation Today: Egypt - "Defiance."

Article; Egypt sets appeal hearing for Al-Jazeera staff:



Exhibit; FILE - In this Monday, March 31, 2014 file photo, Al-Jazeera English producer Baher Mohamed, left, Canadian-Egyptian acting Cairo bureau chief Mohammed Fahmy, center, and correspondent Peter Greste, right, appear in court along with several other defendants during their trial on terror charges, in Cairo, Egypt. Adel Fahmy, the brother of Mohammed Fahmy, said Tuesday, Oct. 21, 2014, that a Cairo court has set the appeals hearing for three staffers of the Qatar-based broadcaster convicted in Egypt. The scheduled court date is Jan. 1, 2015. (AP Photo/Heba Elkholy, El Shorouk, File) EGYPT OUT.

Article; eBay’s Egyptian Tomb Robbers:


Exhibit; A member of the Egyptian special forces stands guard on the main floor of the Egyptian Museum in Cairo, Egypt, Monday, Jan. 31, 2011. Would-be looters broke into Cairo's famed Egyptian Museum, ripping the heads off two mummies and damaging about 75 small artifacts before being caught and detained by army soldiers, Egypt's antiquities chief said Saturday. Dr. Zahi Hawass, Director for the Supreme Council of Antiquities in Egypt, said the vandals did not manage to steal any of the museum's antiquities, and that the prized collection was now safe and under military guard.(AP Photo/Tara Todras-Whitehill).

Article; Give Egyptians Their Rights:


Article; UNESCO to help Egypt museum recover from blast:


Exhibit; Egyptian plainclothes policemen stand guard in front of the Islamic museum at the site of a suicide car bomb at the Egyptian police headquarters in downtown Cairo, Egypt, Friday, Jan. 24, 2014. Egypt's antiquities minister, Mohammed Ibrahim, said the explosion badly damaged the facade of the 19th century museum and artifacts inside, including a rare collection of Islamic art objects dating back to 1881. (AP Photo/Amr Nabil).

Article; Egypt Is 'Closely Following' Ferguson:


Article; Cairo Car Bomb Kills 3.


Article; Bombings rock Egyptian capital, killing 6 people:


Exhibit; An Egyptian man stands in rubble after an explosion at the Egyptian police headquarters in downtown Cairo, Friday, Jan. 24, 2014. Three bombings hit high-profile areas around Cairo on Friday, including a suicide car bomber who struck the city's police headquarters, killing several people in the first major attack on the Egyptian capital as insurgents step up a campaign of violence following the ouster of the Islamist president. (AP Photo/Khalil Hamra).

Article; Monkey Cage: How repressing the Brotherhood could have unintended consequences in Egypt:


EGYPT; A NATIONALS NATIONS MONOTONY!!!




at

Hi Blog Translate

Hi Engineering Jobs!.

Hi Engineering Jobs!.
Hi Search Jobs >Industry Sector > Region > Job Function > Over 100's Of Jobs

Hi Wikipedia Search.

Search results

Hi Contact Form.

Name

Email *

Message *

Hi Source - Latest Category Technical Articles.

Loading...

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.

Hi Total Pageviews.