Generator set emissions for the Santiago Metropolitan Region are limited by the regulations defining particulate matter (PM) limits for stationary sources, Table 1. The limits apply to generator sets rated at 20 kW or more electrical output and must be met at rated conditions.

Table 1
Emission Limits for Generator Sets in the Santiago Metropolitan Region
Nominal Power, PPM LimitApplicationFrequency of Certification
P < 300 kW56 mg/Nm3Continuous / Prime PowerEvery 3 years
EmergencyCertification not required
P ≥ 300 kW112 mg/Nm3Continuous / Prime PowerEvery 1 year
EmergencyCertification required only once

In situations of poor ambient air quality, sources with PM emissions greater than 32 mg/Nm3 (28 mg/Nm3 if air quality is exceptionally bad) are not allowed to operate.

In November 2006, a draft regulation was published in Chile’s national gazette that would set emission limits in the Santiago Metropolitan Region for new and existing stand-by and emergency electricity generator sets of 20 kW or more electrical output, powered by internal combustion engines (Table 2). However, the final rule was never published and the proposal was abandoned.

Table 2
Proposed Emission Standards for Generator Sets, mg/Nm3
ApplicationNominal Power, PPMNOxCOTHC
Existing GeneratorsPrime Power20 kW ≤ P < 300 kW45 5,000600400
P ≥ 300 kW5 5,000600400
EmergencyP ≥ 150 kW180 -- -
New GeneratorsPrime Power20 kW ≤ P < 300 kW45 2,900600400
P ≥ 300 kW52,900600 400
EmergencyP ≥ 20 kW752,900600400

Emissions were to be measured at rated conditions, converted to standard conditions (25°C and 1 atm) and corrected to 5% O2 by volume.

Acknowledgement: This article based in part on information submitted by Marcelo M. Guerrero of ENAP.