Drill ships and offshore rigs
Our vapor infusion system was installed on both the thruster and main engine coolers of a semi-submersible offshore drilling ship. Three months later, engineers determined that the thruster performed better during pressure drop tests with high loads (including 100% load tests for 15 minutes). This customer subsequently implemented the vapor infusion system on all 16 heat exchangers (plus backups), resulting in significant improvement to the cooling system.
Cruise and cargo ships
In one cruise ship case, two sets of main engine coolers (forward and aft) had operated for over a year without cleaning. Our vapor infusion system was then installed. After fourteen months using the system (or 26 months in total operation), engineers opened each exchanger for observation. Neither cooler exhibited significant fouling, indicating that vapor infusion systems can improve performance and extend time between cleaning.
A commercial halibut hatchery uses plate heat exchangers to control the water temperature of its fish tanks. To reduce fouling in the tanks, the aquaculture farm had been backflushing the tanks weekly and using hypo-chlorination twice a week. Our vapor infusion system was installed as an alternative. After three months, the company had eliminated chlorine and substantially reduced maintenance and operating costs.
A geothermal system at an electronic manufacturing facility was experiencing severe fouling. The design pressure of the heat exchanger was 6 psi. Iron-reducing bacteria fouling caused an inlet back pressure of 30 psi and greater and rapid recipient well back pressure. Despite spending US$80K/year in chlorination, this facility still had to deal with recipient well screen fouling, tearing down, and acid washing the system every 30 – 60 days. Instead of replacing the geothermal cooling system with a US$1.2 million air-cooling system, the facility installed a vapor infusion system. After 15 years, the facility has saved over $1.3 million with
- no required disassembly or chemical cleaning of the heat exchangers
- back pressures remaining near installation operating pressures
- no cleaning of the wells
- minimal maintenance (only a five-minute cartridge change once a month)
We are investigating many other applications including
- submerged surface anti-fouling
- sea chests and piping system
- exhaust gas scrubbing systems
- geothermal systems and heat exchangers
- remote fluid, enclosure, and surface disinfection
- remote surface and enclosure corrosion deterrent
- sewage discharge water treatment to replace chlorination
- RO membrane fouling deterrent
- drinking water sanitation
- fire suppression system anti-fouling