Cold store, NH₃ machine room and heat recovery
SCADA for a six-compressor NH₃ machine room, cold stores with ethylene and humidity monitoring, and a heat recovery system.
- Industry
- Cold storage
- Year
- 2023
- Highlight
- 6 NH₃ compressors, 7 cold store rooms
The system
The machine room includes a -38 °C NH₃ pumped separator, a -10 °C surge drum, NH₃/glycol heat exchangers, an NH₃ receiver, three condensers and six NH₃ compressors rated from 160 kW to 630 kW. Machine room temperature, humidity, NH₃ gas sensors and the air purger are also monitored.
The cold store section has seven rooms and a corridor. Set point, evaporator temperatures, humidity, ethylene and remaining defrost time are tracked for each room, and roof fans can be run manually or automatically.
What we delivered
- Machine room, cold store and heat recovery screens
- Monitoring of cooling demands (-38 °C, -10 °C, glycol) and defrost demand
- Heat recovery: inlet and outlet temperature calibration, CO₂ ppm set point, exhaust and supply fan delays
- Air handling pumps: pressure alarm delay, outlet temperature set point, Kp and Tn for the proportional valve, pressure limits
Result
The machine room, cold stores and heat recovery system are combined into one English-language interface with linked screens.
Project images
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