Active Cooler

We supply both passive and active coolers to optimize thermal management of fluids during production, transport, and refining.

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The subsea active cooler is the first of its kind; its light, compact design offers a high degree of temperature control. It is a shell and tube cooler based on forced convection. The pump, motor, and power control configuration is the first qualified subsea design of its kind, in which the oil-filled motor is isolated from the pump by a magnetic coupling. The pump module, which includes a variable-frequency drive (VFD) motor controller, is designed for a subsea installation down to 3000 m. The motor is speed controlled, which makes it possible to operate the cooler within a predefined temperature range. The variable-speed drive (VSD) and control system is fully redundant and is qualified according to ISO 13628-6.

Benefits

Use of field-proven topside cooler technology
Compact, light, and cost efficient
Controlled cooling through the incorporation of temperature sensors and control of forced convection pump speed
Lower surface temperature of the tubes gives reduced risk for scaling
Flow assurance benefits
Provides a closed environment, which is advantageous for maintenance operations such as acid cleaning

The subsea active cooler enables:

Inlet cooling to increase compressor efficiency period
Post-cooling to prevent pipeline overheating
Interstate cooling and/or anti-surge cooling