DIESEL ENGINE FILLS ORDER FOR HEAT GENERATION

Scania, division of Saab Scania, Sweden, through distributor Truck AG, recently delivered a Scania DSC14 diesel engine specifically ordered for its capacity to generate maximum heat. The engine was to power a mobile, high-capacity nitrogen gasifier to be supplied by Cyromec AG, Switzerland, to Dowell Schlumberger for service in Libya. The nitrogen is to be used for pipeline drying. Cyromec chose the turbo-charged and intercooled (air/air) Scania DSC14, rated at 384 kw (522 hp) at 2,100 rpm, to

Nov. 5, 1990

2 min read

Scania, division of Saab Scania, Sweden, through distributor Truck AG, recently delivered a Scania DSC14 diesel engine specifically ordered for its capacity to generate maximum heat.

The engine was to power a mobile, high-capacity nitrogen gasifier to be supplied by Cyromec AG, Switzerland, to Dowell Schlumberger for service in Libya. The nitrogen is to be used for pipeline drying.

HEAT DELIVERY

Cyromec chose the turbo-charged and intercooled (air/air) Scania DSC14, rated at 384 kw (522 hp) at 2,100 rpm, to drive the nitrogen pumps and deliver heat to the evaporator.

In addition to the standard front-mounted radiator, the V8 engine is fitted with water-cooled exhaust pipes and dividing gear on the flywheel for driving hydraulic pumps and a water brake.

The hydraulic system powers high-pressure piston pumps which deliver the liquid nitrogen to the evaporators. The water brake loads the diesel to maximum rating, thus producing the maximum heat generation from the engine.

After passing through the evaporators, the engine and exhaust cooling-water flows are recycled through a three way valve. The regular radiator serves as an emergency cooler.

PIPELINE TESTING

Natural-gas pipelines, following construction or overhaul, are pressure tested with water at 200 bar (2,900 psi).

All traces of water must then be removed to prevent contamination of the gas and corrosion of the pipes.

Repeated evacuation is one method, but it is slow and expensive.

High-pressure nitrogen does the job faster and at less cost.

The nitrogen, delivered and stored under pressure in liquid form, is pumped under pressure through evaporators where it is gasified and reaches a pressure of approximately 700 bar (10,150 psi).