The Challenges of Unsupervised Industrial CVC
In industry, HVAC (Heating, Ventilation, and Air Conditioning) is not just a matter of comfort—it is often critical to production. A server room without air conditioning will overheat in a matter of minutes. A pharmaceutical plant whose cleanroom exceeds its temperature and humidity limits will halt production. A food processing plant whose cold storage room warms up risks bacterial contamination and a product recall.
However, monitoring of industrial HVAC systems is often limited to a few indicator lights on a local PLC and periodic manual inspections. Remote HVAC monitoring fills this gap by providing constant visibility and instant alerts.
Parameters Monitored by Equipment Type
Air Handling Unit (AHU)
| Parameter | Unit | Typical Alarm Threshold |
|---|---|---|
| Supply air temperature | °C | ± 3 °C vs. setpoint |
| Return air temperature | °C | Trend monitoring |
| Supply air humidity | % RH | ± 5 % RH vs. setpoint |
| Filter differential pressure | Pa | > 200 Pa → clogging |
| Airflow | m³/h | < 90% of rated value |
| Fan status (VF) | on/off/fault | Any fault |
| Power consumption | kW | Deviation ± 15% |
Chiller Unit
- Chilled water supply and return temperatures
- Chilled water flow rate (flow meter)
- High-pressure (HP) and low-pressure (LP) of the refrigerant circuit
- Condensation temperature (water or air)
- Compressor power and calculated COP
- Compressor operating hours
Cooling Tower
- Cold and hot water temperatures
- Delta-T and tower efficiency
- Water conductivity (scale buildup)
- pH and biocide disinfection levels
- Automatic blowdown flow rate
Detection of Failures and Performance Deviations
Industrial HVAC monitoring is not limited to detecting outright failures (fan malfunction, compressor high-pressure safety shutdown). It also detects the gradual deviations that precede failures:
- Filter fouling: gradual increase in differential pressure drop.
- Refrigerant pressure drop: gradual decrease in high-pressure (HP) and low-pressure (LP) pressures and in the coefficient of performance (COP).
- Heat exchanger fouling: increase in the temperature difference (delta-T) across the chilled water/condenser heat exchanger.
- Fan belt wear: increase in motor current at constant airflow.
- 3-way valve issue: persistent discrepancy between the setpoint and measured temperature.
These advanced detection capabilities make it possible to schedule maintenance before a breakdown occurs, at the most opportune time for production.
Securing Critical Areas
Some industrial areas require enhanced monitoring:
- Cleanrooms (pharmaceutical, microelectronics): temperature ±1 °C, relative humidity ±5%, controlled overpressure, FDA 21 CFR Part 11 compliance.
- IT facilities (data centers, server rooms): temperature < 25 °C, critical alert < 28 °C, automatic server shutdown if temperature > 35 °C.
- Laboratories and archives: environmental conditions compliant with preservation standards (NFZ 40-010 for archives).
The platform allows you to configure different monitoring profiles by zone, with thresholds and escalation rules tailored to the requirements of each critical area.
Energy Optimization of Industrial HVAC Systems
Monitoring also provides tools for energy optimization:
- Free cooling: Automatic switch to outdoor air cooling when the outdoor temperature is less than the chilled water temperature minus 3 °C.
- Start-up sequencing: Avoid power spikes during morning startup by sequencing equipment.
- Occupancy-based control: Reduces airflow rates and temperature setpoints outside of production hours.
- Standby unit management: Automatically alternates between redundant units to balance operating hours.