Wednesday, December 13, 2006

Inefficiency of Hydrogen based economy

A fuel cell is an electrochemical device that combines hydrogen and oxygen to produce electricity, with water and heat as its by-product.

In a recent study, fuel cell expert Ulf Bossel explains that a hydrogen economy is a wasteful economy. The large amount of energy required to isolate hydrogen from natural compounds (water, natural gas, biomass), package the light gas by compression or liquefaction, transfer the energy carrier to the user, plus the energy lost when it is converted to useful electricity with fuel cells, leaves around 25% for practical use — an unacceptable value to run an economy in a sustainable future. Only niche applications like submarines and spacecraft might use hydrogen.

Energy taken for producing and transporting hydrogen to its destination is 3 times the energy taken for producing and transporting electricity directly.
[the picture is descriptive of the technical details ]

Saturday, December 02, 2006

Vista releasing on Jan 30th 2007 !

Windows vista, the next edition of the windows product line, ie, the successor of XP comes out for end users on Jan 30th 2007.
The date is finalised by Microsoft and there are 4 editions available.
They are, Home Basic, Home Premium, Business and Ultimate.

The features list of differences in different editions is shown below.

The list clearly shows that Vista Ultimate will be the best edition we will be using.