What is PEMS?
PEMS (Predictive Emission Monitoring Systems) estimate emissions like NOx, SO2, CO from regulated combustion sources. They use mathematical models to correlate inputs with emissions, offering cost-effective alternatives to conventional CEMS. PEMS comply with regulations, reducing capital costs and serving as backup for CEMS downtime. US EPA Performance Specification 16 (PS-16) outlines compliance and excess emission PEMS, ensuring emissions are within limits.
PS-16 mandates a Relative Accuracy Test Audit (RATA) to certify PEMS accuracy. Unlike CEMS RATA, PEMS RATA compares audit data with algorithm predictions. PEMS RATA covers various process conditions, while CEMS RATA typically has nine runs at a single condition. Continuous compliance PEMS need nine runs at each level, while excess emission PEMS require three runs. Compliance PEMS undergo additional statistical tests (bias, variance, correlation coefficient) for certification.
Periodic RATA & RAA
Following initial certification, a PEMS must undergo ongoing compliance tests: an annual Relative Accuracy Test Audit (RATA) and quarterly Relative Accuracy Audits (RAAs) as per PS-16. HGI performs annual RATAs using Auto-CEMS, which can immediately collect reference method data if a PEMS issue arises during RATA. This avoids downtime without extra costs. Quarterly RAAs use portable analyzers and ASTM D6522-00. After initial certification, three successive quarterly RAAs and one annual RATA, only one RAA per year is needed. Compliance testing restarts if PEMS model changes are required based on audit results.
What We Can Do For You?
At HGI, we possess the competence and certifications to offer a range of tailored services, trainings, and courses to meet your specific requirements. Our services encompass:
To speak to a member of our team about any of the services we offer, please fill out the contact form.We aim to respond same day however it may take a little longer if your request is of a technical nature.
Ground Floor, No.393, Lot 4049, Parkcity Commerce Square, 97000 Bintulu, Sarawak.
Lot 6, 2nd Floor, Bandar Labuk Jaya (D), Phase 2 Mile 7, Labuk Road, 90000 Sandakan, Sabah.
Lot C 15-03, The Link 2, Jalan Jalil Perkasa 1, 57000 Bukit Jalil, Kuala Lumpur.
Copyrigh 2023 © Hypergreen Instruments. All rights reserved. [MD]