In the Diagrams we see Kristin Layout. The elevation and Plan show the stern positioning. The last 2 diagrams illustrate, the selection of
Process Cases and the Heat and Mass Balances related to these. Heat Recovery plays an important part in the arguments for the economy
of Gas Turbines. The need for this is balanced by the cost of supply for extensive inlet and exhaust systems particulary for heat recovery
usually via a steam generation system. The Kristin Study was able to make use of the fact that the available Gas Turbines of low weight were
now in the 40mW Range. Varg also shows Stern sited Power Generation.
1 ABB Kristin Lavrans Specification Basis
1 ABB Kristin Lavrans Specification Basis
2 ABB Kristin Lavrans GT Arrangement
2 ABB Kristin Lavrans GT Arrangement
3 Kristin Filters for GTs
3 Kristin Filters for GTs
1 Varg Deck View
1 Varg Deck View
Following on we see the establishment of the machine /Driver and the restraints concerning it's postioning. On the stern it is in a less
hazardous postion, away from the Process Area's, its only complication in this respect concerns theFuel Gas Feed, Given the Mass
Balances of Process and its Process Acceptability, its extentof supply must be confirmed. The location of the units on the stern follows the
safety philosophy developed, these are in a similar position as Varg. Being on the stern it is essential for mono hulls that the stern does not
display large movements from the sea state, ie a wave must exit the hull without excessive lift. With items like this it is not the bare machine
but the accessories it must have to enable it to be located in the environmet specified. Gas Turbines do not generally like a saline
atmosphere, this is particularly true for the blading. For this reason elaborate filtration and seperation must be installed for the combustion air
intakes. To assist economic use heat recovery is required for the combustion gas exhaust, silencing and any ingress from sea
water/atmosphere.
1, Kristin Power Gen Deck Layout
1, Kristin Power Gen Deck Layout
2, Kristan Component Layout of Power Gen
2, Kristan Component Layout of Power Gen
3, Kristin GA ABB GT
3, Kristin GA ABB GT
4, Kristin Systems Steam ABB GT
4, Kristin Systems Steam ABB GT
5, Kristin Power Choices
5, Kristin Power Choices
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Kristin FEED illustrates some of the choices which condition Modularisation Kristin FEED
and Varg had many similarities. This particularly conserns Power Generation. Both saw GT,s as a solution and the installation of Power
Generation on the stern of the relarive Floater. Both use a bow swivel mooring, booth have profiles to accomodate Bow and Stern Rise. Stern
Power Generation requires stability of the hull to allow continuos power generation without interuption because of movements to upset shaft
dynamics. All rotational shafts, GT's Comp[ressors etc require stability for bearing dynamics. these are monitored by accelerometers, gap
measuremnts etc. Both the Kristin FEED and Varg saw this as a solution. Kristin Feed had othe requirements. Most ot this was the
compatabilty of GT's versus Steam Turbines to produce epower the most effectively. Kristin had a vriable process requirement and the
diagrams show the analasys between a steam route verssus a GT route. Atr the time of the FEED ABB had introduced a larger style of GT
and had established a related heat recovery. The related exercise was to eatablish the optimum. Best Price, Best Production, Best Economic
Out Put, Best Operational Case etc etc . This for the kristin FEED was to use ABB GT;s.
Drilling Whole range
Drilling Whole range
MODULEitus
a general understanding of Modules 
Level 1
Level 2
Level 3
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