By Bruno De Wachter / Published on Wed, 2008-12-10 06:30
Many companies prefer to combine the two
When a company wants to switch from grey to green power, it has two major options: either buy renewable power with Guarantees of Origin from a utility company, or start a project exploiting renewable energy on its own site. The Belgian utility company Electrabel asked a few of its environmentally-concerned business clients which of the two options they prefer. 'We want a combination of both' was the answer that came back most often.
But what are the main advantages and disadvantages of both options? Here is an attempt to discuss them:
Read full story
By Hans De Keulenaer / Published on Sat, 2006-11-25 12:45
Take a short quiz (8 questions) on the subject of 'Total Ownership Cost of Transformers'.
Before or after taking the quiz, you can review our webcast on this subject.
Read full story
By Hans De Keulenaer / Published on Mon, 2006-07-17 09:02
In a dozen screens, this minute lecture introduces the concept of total cost of ownership for distribution transformers, offering a practical method for calculation based on very limited input data. Since transformers consume their purchase price several times in lifetime energy losses, high efficiency transformers usually offer an attractive return on investment. And because of their long lifetime, savings earn money for several decades.
Read full story
By Hans De Keulenaer / Published on Tue, 2005-05-24 00:00
UPS manufacturers follow the IT culture, used to deal with modular and versatile equipment. A question then arises : should the power protection be distributed (installed in the rack) or centralized (in an electrical room). A centralized system is faster to implement. It requires a cheaper and smaller area per kW. Rightsizing centralized power from the beginning facilitates "plug-and-play" IT installations. The efficiency is better optimized, centralized UPS having lower losses cooled by cheaper air-conditionning.
Read full story
