綠色和平比較多引介風能, 其實除了風能外, 還有很多再生能源的可能, 從 World changing 就看到英國 Manchester 大學新設計的海潮風電器的設計. 而且該設計利用了廢棄的輸油管 !
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Power generation based on the "motion of the ocean" offers
significant long-term value, and arguably could eventually displace
solar and wind generation for large-scale renewable energy projects.
Hydrokinetic power (encompassing wave, current and tidal power) doesn't
have the "intermittency"
problems facing solar and wind, nor are there as many issues about
ruined views and overrun landscape. Costs remain high, however. There
are numerous ocean power projects in testing,
and while most show promise, I don't believe we've yet seen the real
breakout project putting ocean power at the front of the renewable
energy race.
The latest contender is the "Manchester Bobber,"
an ocean power platform design from the University of Manchester. The
up-and-down motion of the water surface drives a generator; a full-size
unit should be able to produce a mean power output of around 5
megawatts:
[Professor Peter Stansby, co-inventor of
the Manchester Bobber :] "Energy from the sea may be extracted in many
ways and harnessing the energy from the bobbing motion of the sea is
not a new idea. It is the hydrodynamics of the float employed by the
Manchester Bobber that provides the vital connection to generating
electricity."
The devices unique features include:
The vulnerable mechanical and electrical
components are housed in a protected environment well above sea level,
which makes for ease of accessibility.All mechanical and electrical
components are readily available, resulting in high reliability
compared to other devices, with a large number of more sophisticated
components.The Manchester Bobber will respond to waves from any direction without requiring adjustment. The ability to maintain and
repair specific 'Bobber' generators (independent of others in a linked
group) means that generation supply to the network can continue
uninterrupted.
One interesting proposal
is that the Bobbers be built on decommissioned oil rigs. Aside from
reducing the construction costs, this idea has a significant symbolic
value.
Phase 1 tests of a 1/100th working model completed early this year,
and Phase 2 tests of a 1/10th scale version are now underway. The
university group is working on a preliminary design of the full-size
version, and hope to have a time frame for construction by the end of
this year.
(Via We Make Money Not Art)