ASPA Pago Pago Waste to Energy

This was the installation of 2x ORC (Organic Rankine Cycle) units. ASPA (American Samoan Power Authority) has 4 Large Diesel generators which generate a lot of heat. This heat was previously wasted through cooling towers. The ORC units take this heat in the form of hot water, and convert it into electricity which is then added into the grid

Hot water enters the evaporator to heat the working fluid, a refrigerant, until the working fluid is vaporized.  High-pressure, hot vaporized working fluid then enters the power module and drives a turbine to produce electrical power.  Low-pressure, expanded vapour cycles through a condenser where it is cooled and condensed into liquid form.   The cooled liquid is then sent to the pump, boosted in pressure and sent back to the evaporator to repeat the cycle.   Heat rejected during condensation is sent to a cooling tower.

The plant is loacted at Tafuna, Pago Pago, American Samoa.

The head contractor for this job was Service Engineers.

The project is complete and up and running !