Refinery executes a flawless turnaround without diesel generators

Aggreko approached a major refinery on the West Coast with the option to use existing grid power to support maintenance and construction loads for their fast-approaching turnaround. A few years earlier, this same turnaround was completed using multiple generators with cables crisscrossing the work area. Space constraints, exhaust fumes, cable routing, fueling activities, and emissions added to the complex situation. Following several meetings with key TA personnel, a “Letter of Intent” was issued to design and install an on-grid structure. The project began with a review of the work scope, timeline, and contractor power requests.

The connected load was calculated at 22.8 MVA. Using proprietary monitoring technology and data gathered from past projects, Aggreko quickly determined the load to be excessively large for a project of this size and scope. Following a thorough vetting process, peak demand was dialed back to 10.9 MVA, a 52% reduction in demand, resulting in significant cost savings. While working with the client’s in- house engineering team, multiple 2.4 kW sources were identified, and a feasibility study was performed to determine if available power could be connected in advance without interrupting ongoing production. Aggreko’s electrical engineers proceeded to design a temporary installation using existing house power after the feasibility test declared it was possible.