The Glass CHP · CHP

When must NOx be measured continuously?

Ventilation/dehumidification — the silent 24/7 load, with heat recovery. Part of the glass family — like our glass BESS, biogas plant and CHP.

When must NOx be measured continuously?
Outdoor air Fresh air Heat recovery Heating coil Hall Exhaust
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What the AI does
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What is When must NOx be measured continuously??

From a certain firing capacity, the BImSchG (Federal Immission Control Act) prescribes continuous emissions measurement; NOx limit value for biogas gas engines: 650 mg/m³ — Exceedances must be reported and can lead to operational restrictions.

The plant — right now

connect… · anonymous reference plant · read-only from the process control system, calculated in-house Exhaust gas cyl 1 … °C Before catalyst … °C After catalyst … °C Intake air … °C Excerpt from … plant measurements. To the detailed explanation page with video →

What the AI reads from these values

What the AI reads
  • Current NOx value compared to the limit value of 650 mg/m³
  • Trend analysis for detection of catalyst degradation
  • Comparison of actual values with the target value of the control algorithm
  • Early warning of instabilities in the combustion process
Scenario

Monitored: continuous

The scenario: if an emission value creeps slowly upwards, it is only noticed during the official measurement; in the worst case, operation is restricted. The AI: detects the trend towards the limit value early and reports the need for action before the measurement occurs. It identifies the trend before the limit value is exceeded.

Why this matters

Continuous monitoring prevents fines and shutdowns due to limit value exceedances. Precise NOx monitoring enables proactive maintenance of the exhaust gas aftertreatment. This ensures stable operation of the CHP unit and optimizes the service life of the catalysts. Measured value (mg/m³) · Limit value (mg/m³) → — % reserve to limit value Calculation path: (Limit value − Measured value) ÷ Limit value × 100

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