Future Technology AS has developed the FSCC - Future Subsea Controllable Cooler. It is a 2nd generation passive subsea cooler which is characterized as being reliable, compact, cost efficient and environmentally friendly.
FSCC exploits the naturally buoyant flow of seawater around the cooler tubes to maximize the cooling rate and minimize the overall size and weight. FSCC is designed to operate in an environment with quiescent seawater, however, sea currents will increase its cooling performance.
Future Technology AS is proud to present its software SIMCOOL, a unique and flexible tool developed for designing and optimizing subsea cooling.
SIMCOOL enables detailed design output and optimization of the FSCC and gives highly accurate and efficient calculations based on the individual needs of the client.
Based on the knowledge from years of experimental and numerical research, the accuracy of SIMCOOL allows for design of a cost effective and compact cooling unit.
SIMCOOL is fully qualified by full-scale prototype testing.
The FSCC offers an improved solution to the cooling requirements on HVDC converter platforms. HVDC (high voltage direct current) technology is often the preferred choice for transferring power from offshore wind farms or wind farm clusters located far from shore. Offshore converter platforms are needed to convert the AC power generated by the wind turbines into HVDC. In the conversion process, a part of the power is lost to heat, which introduces the need for an efficient cooling system.
The traditional cooling method for HVDC platforms is to use an open seawater system comprised of submerged seawater pumps and filters, as well as heat exchangers and ancillary systems/equipment located on the platform deck. The open seawater cooling systems are susceptible to clogging of filters, which results in frequent and extensive maintenance needs and subsequently high costs and reduced reliability. To prevent fouling, these systems are also dependent on hypochlorite additives which are continuously released to the seawater.
The subsea cooler is passive, has no moving parts and operates in a closed loop where a mixture of glycol and water is circulated through the cooler. It eliminates the need for an open seawater system. This removes the need for seawater pumps and their accompanying power supplies, as well as negating the need for filters, water treatment systems, and associated equipment.
FSCC for Offshore Wind applications was developed based on the Oil & Gas version with support from Innovation Norway through the environmental technology scheme. The implementation of the FSCC technology for HVDC platform cooling is supported and co-funded by the European Commission through the Coolwind project, as a part of the Horizon 2020 program.
FSCC OFFERS REDUCED CAPEX AND OPEX
Using FSCC to meet the cooling requirements on HVDC platforms significantly reduces the complexity and increases the overall robustness of the cooling system. Furthermore, it minimises the need for maintenance and repairs and reduces energy consumption on the platform.
THE ADDED BENEFITS ARE:
Zero emission | no chlorides or other chemicals
No sea water filters | no clogging
OPEX | minimum 50% lower OPEX
Low maintenance | Maintenance interval 5 years
Low power consumption | 90% lower than existing solutions
Scalable | a solution for complete HVDC cooling
Robust | well proven technology and static equipment
Depending on the application, the cooling requirement may change considerably during the lifetime for an oil/gas field.
The controllability is an important feature for its application within Oil & Gas, where changes in production rates and water content change the cooling requirements significantly. A controllable cooler reduces the risk for overcooling, thus preventing hydrate formation and wax precipitation. A controllable cooler contributes thereby to reduce the need for chemicals.
REDUCED CAPEX AND OPEX THROUGH
Reduced size and weight |reduced costs in fabrication, installation and maintenance
Controllability |cooling can be adjusted to yield an optimal outlet temperature
Passive | no energy consumption and minimized need for maintenance
Environmentally friendly | reduced need for chemical injection and no C02-emissions
Pipeline inlet cooling allowing less expensive pipeline materials to be used
Inter-stage and inlet cooling for subsea gas compressors to increase efficiency
Re-cycle cooling for subsea gas compressors
Subsea separation for increased separation efficiency
«Cold flow» to control hydrates and wax in pipelines
Future Technology AS has developed FSCC with support from ENGIE E&P NORGE, Lundin Norway AS, Innovation Norway and the Norwegian Research Council through the DEMO2000 program.