“Wood”
must be the first fuel to fulfill the need of energy at the beginning of homo
sapiens or neanderthals. It contains roughly 3000-4000 kcal/kg and can be kept for a very long time. Only a
tiny transportation and storage effort is needed. Than it comes the discovery
of “coal” doubling the energy content within the same amount of substance
(4000-7000 Kcal/kg). With the petroleum mankind reach the pinnacle of its
discoveries. (10000 Kcal/kg)
Coal
and petroleum availability are limited in our world and will be soon exhausted
within few centuries. Also have big environmental pollution disadvantage. But
sooner or later will be used as ready energy source.
Sunlight
is a marvelous energy source. But the cost of the solar panels and limitations
of the energy storage, its usage is still small. Its unavailability during
nights and cloudy days also a bid disadvan -tage.
In
reality one hour of sunlight energy is far enough for whole world annual requirement
but we are facing a storage barrier. Battery industry is still struggling hard to
improve its capacity limitations. Lithium ion batteries are 21. Century biggest
novelty. We started to use even in electric cars already.
We can
expect very easily that in the near future we will have a quicker chargeable
batteries with increasingly holding capacity. Is there a natural limit of
capacity? For sure… At the end we are handling electrons ! But there is still quite long way to go until we reach to the quantum level.
The difficulty
is in its nature. There is no any archetype to investigate and work on its
reverse engineering .
At the
beginning of the industry revolution the
usage of energy required three stage ,while in every step there was important losses
. Producing steam from coal and using a steam engine to produce electricity is
low yield process. The same applies to petroleum products .
Better batteries and better engines are the next challenges of the technological industries..
Avram Aji
26.02.2018
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