Chile is committed to reducing greenhouse gas emissions and maintains an aggressive timeframe to meet their goals, and thus are very strict on regulations. The country’s geology and geography also create stress on natural gas supply and transmission lines. Peaking facilities, like this plant, are relied upon heavily to support the grid.
Gas fuel in Chile is expensive, so there was also a financial requirement to run the gas turbines on liquid fuel. Without a water injection system, using liquid fuel would cause the plant to exceed the new government limits on emissions. Failure to comply could result in significantly increased tax payments, with new legislation in place taxing power plants at $5 per metric ton of CO2 emissions. The desert location added further challenge in that any solution involving water had to include additional infrastructure.