"Other" covers the alternatives to the Power Generation Methods previously mentioned, i.e. Gas Turbine, Diesel. These to are by far the major
source of power but its important to be aware that in some instances other sources of power are used. The Title "Other" has been used
since it is non specific and allows the broad interpretation about the some of the changes that are happening to Offshore activity. There are on
platform alternatives, other alternatives concern Onshore Power Generation and Sub Sea Systems particularly Electrically Powered. Lastly
these Power Systems mentioned are also conditioned about the current activity to make Offshore Installations and Systems more efficient.
The pressure to do this is impacted by the Price of Crude, with no restraint from price then marginal fields become profitable. With minimum
margins then the impetus to be more efficient produces the need to improve productivity, this may be to equipment, systems or installation.
This Diagram shows the Boiler on Uisige Gorm converted to gas firing using an
Off Specification waste process gas containing a pollutant which could not be
vented to atmosphere. It illustrates a good example where a process problem
can be solved at the same time as providing energy, steam which in turn can
drive a steam turbine to drive machinery or a generator. Often there is a need for
steam or heated process feed water, this can be achieved by heat recovered
from the exhaust Gas from a Gas Turbinet. This improves the thermal efficiency
of the system. In doing this a steam generator/boiler may be required to produce
the required condition of the steam or process water. The added value of these
solutions is the environmentally friendliness they add to Power Generation
Some of the other alternatives to these are using steam via Boiler and steam turbine, power wired to the installation from shore, wind or wave
generated etc.
The generation of electricity offshore using deisels or gas turbine drivers is poor in terms of greeness , CO, efficiency etc, the preference is for
onshore generation with power cable to offshore installation. To make this attractive in the current situation the source of power generation
must be near the installation with a minimum length of power sub sea cable and usually shallow water. Such instances of this are few and far
between. Offshore Fields are not usually close to the location of a power source, not close inshore and often in deep water. There are thus few
instances of this type of installation.
Similar comment can be made for wind and sea turbine power generation. Aero Blade Wind Turbines need to be adjacent to the power
consuming Topsides with short cable hookups. This usually means the complexities of offshore and the related cost burden. Other wind
devices such as kites also have complications. If we consider sea turbines, they usually are in tidal areas, areas with a fast current and
more often than not shallower water. Again the attraction particularly of economics does not manifest itself for these to be alternatives.
Although not a power generation "Other" the one new subject which may condition
Power Generation is the interest in the development of sub sea facilities. Usually if
you accomplish a process sub sea you do it more effectively than when you bring
it to a topsides location. This feature of less consumption of epower increases the
attraction of sub sea facilities. It remains to be established that the use of sub sea
facilities will increase but it is the subject of current major interest. The below sites
give some insight into this and cover such subjects as the attraction of AC versus
DC, variable voltage, high voltage, cable materials, viable depths and distances,
line losses etc
a general understanding of Modules 
Level 1
Level 2
Level 3
Uisige Gorm, Off Gas Burner
Uisige Gorm, Off Gas Burner
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