Posts Tagged ‘northbrook’

31 July

The Unsung Hero of Civilization, UL, Underwriters Laboratories, at Intersolar North America 2015

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Dear Friends, Visitors/Viewers/Readers,

UL logo (Underwriters Laboratories)

UL logo (Underwriters Laboratories)

(Please click on red links & note magenta)

UL, Underwriters Laboratories, is an American worldwide safety consulting and certification company headquartered in Northbrook, Illinois. It maintains offices in 46 countries. UL was established in 1894 and has participated in the safety analysis of many of the last century’s new technologies, most notably the public adoption of electricity and the drafting of safety standards for electrical devices and components. UL provides safety-related certification, validation, testing, inspection, auditing, advising and training services to a wide range of clients, including manufacturers, retailers, policymakers, regulators, service companies, and consumers. UL is one of several companies approved to perform safety testing by the US federal agency Occupational Safety and Health Administration (OSHA). OSHA maintains a list of approved testing laboratories, which are known as Nationally Recognized Testing Laboratories. Above is a recording of a short chat with Tony Dorta of UL.

Some historical backgrounds regarding UL, with the help of Wikipedia, below (in Italics):

Underwriters Laboratories Inc. was founded in 1894 by William Henry Merrill. Early in his career as an electrical engineer in Boston, a 25-year-old Merrill was sent to investigate the World Fair’s Palace of Electricity. Upon seeing a growing potential in his field, Merrill stayed in Chicago to found Underwriters Laboratories. Merrill soon went to work developing standards, launching tests, designing equipment and uncovering hazards. Aside from his work at UL, Merrill served as the National Fire Protection Association’s secretary-treasurer (1903–1909) and president (1910–1912) and was an active member of the Chicago Board and Union Committee. In 1916, Merrill became UL’s first president. UL published its first standard, “Tin Clad Fire Doors,” in 1903. The following year, the UL Mark made its debut with the labeling of a fire extinguisher. In 1905, UL established a Label Service for certain product categories that require more frequent inspections. UL inspectors conducted the first factory inspections on labeled products at manufacturers’ facilities—a practice that remains a hallmark of UL’s testing and certification program. UL has expanded into an organization with 64 Laboratories, testing and certification facilities serving customers in 104 countries. It has also evolved from its roots in electrical and fire safety to address broader safety issues, such as hazardous substances, water quality, food safety, performance testing, safety and compliance education and environmental sustainability. In 2012, UL transformed from a non-profit company into a for-profit corporation.
~have a bright and sunny day~
Gathered, written, edited, and posted by sunisthefuture-Susan Sun Nunamaker

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2 April

What Is Solar Cell (5)

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If you are in favor of renewable/CLEAN energy, please sign the petition page showing support for FIT/CLEAN Program at http://sunisthefuture.net/?page_id=1065 Thank you.

Dear readers/friends, I hope you will stay with me for 3 more posts (up to What Is Solar Cell (7)) before we move on to another topic in solar energy. Thank you for your patience.

In the previous post, you have seen that Boron and Phosphorous may be used to as dopping material to be added to Silicon in the process of making semiconductor material for solar cell. But there are also other alternatives.  As a matter of fact, instead of silicon, gallium arsenide (GaAs) is another possibility.  GaAs based multijunction devices are the most efficient solar cells to date, reaching 42.3% by the triple junction metamorphic cell.  High-efficiency multijunction cells were originally developed for applications such as satellites and space exploration.  Triple junction GaAs solar cells were also being used as the power source of the Dutch four-time World Solar Challenge winners Nuna in 2003, 2005, and 2007.

Scientists and engineers are constantly looking for alternatives that would help to increase efficiency and decrease cost.  Most commercially available solar cells are capable of producing electricity for at least 20 years without significant decrease in efficiency.  Typical warranty given by panel manufacturers is for a period of 25-30 years, without having output falling below a specified percentage of the rated capacity. So, there are products and technologies that need to be tested and validated.  In U.S., NREL (National Renewable Energy Laboratory), located in Golden, Colorado, established in 1974 and began its operation in 1977 as the Solar Energy Research Institute, tests and validates solar technologies.

Keep in mind that there are three reliable certifications of solar equipment: UL, IEEE, and IEC.

  1. UL: Underwriters Laboratories Inc. (UL) is an independent product safety certification organization established in 1894 and has its headquarters in Northbrook, IL.
  2. IEEE: Institute of Electrical and Electronics Engineers or IEEE (read I-triple E) is a non-profit professional association dedicated to advancing technological innovation related to electricity. (45% of its members are located outside of US).
  3. IEC: International Electrotechnical Commission is a non-profit, non-governmental international standards organization that prepares and publishes International Standards for all electrical, electronic, and related technologies.

Now, I have a clip for you at http://www.youtube.com/watch?v=sRqmTpozPYA or simply click below:

 

Stay tuned at the same bat channel…more will be in store for you…

Please feel free to leave comments or questions.

Posted by sunisthefuture-Susan Sun Nunamaker, sunisthefuture@gmail.com
Homepage: http://sunisthefuture.net http://sunisthefuture.com http://sunisthefuture.org
Any comments and suggestions are welcomed at sunisthefuture@gmail.com

Please also get into the habit of checking at these sites below for more on solar energy topics:

www.sunisthefuture.net

www.youtube.com/user/sunisthefuture

www.kiva.org/team/sunisthefuture

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www.pinterest.com/sunisthefuture

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