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Three 30-ton InPac units cooling a VFD building

Providing cooling for high sensible load applications such as remote instrument enclosures and variable frequency drive shelters.

Despite political struggles, LNG and crude oil pipelines continue being approved by governments and constructed across thousands of miles of land worldwide. Along with the creation of jobs, both direct and indirect, the pipelines create a large demand for electricity at each of the pumping station sites in order to power the large VFDs that control the flow of material. The VFDs generate tremendous amounts of heat that must be dissipated quickly, before it causes a critical failure of the equipment.

Even worse, the pumping stations are often unmanned, and in the middle of sparsely populated areas, making access to them difficult, time consuming, and extremely costly, especially in the event of a process failure. It is for cases like this that our units are purpose built, with included 50% redundancy and time-proven, industrial grade build quality.

Reverse Airflow

You know that heat rises. So when trying to remove the heat, it stands to reason that it would be easier to remove it from the top of a room. Therefore, in many cases, ducting the return air directly to an HVAC unit configured to have return at the top and supply at the bottom can provide improved circulation and help to keep the building cooler.

Since many VFDs are designed to pull cool air from down low and exhaust it into the air above, this can be even more important. If the building is on piers, another option is to hook supply air directly to the VFDs through ductwork under the building, while leaving the return air unducted.

N+1 Redundancy

Along with our inherent 50% redundancy, critical applications need full reassurance that a process will not shut down in the event of a unit failure. Including an additional complete unit on the building will further minimize the potential for downtime, as well as help improve the life of the systems themselves through a lead-lag multiplexor that automatically rotates which units are in use.

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