Objective: Test the air quality inside a cold room and define the right air renewal requirements to ensure employee health and comfort and mesure the AHU energy impact.
Installation of 5 sensors in the cold room enclosure at different points:
– 2 sensors for CO2, temperature and humidity
– 3 total VOC sensors
Installation of a sensor outside the cold room:
– 1 CO2, temperature and humidity sensor
The aim of the modelling is to :
– recreate the CO2 profile measured on site, at 50% activity and 100% activity
– optimise ventilation to meet IAQ objectives, in order to avoid over-ventilation
– determine the energy savings associated with the optimised ventilation scenarios
·Cold room
· 300m²
· North of France
The customer wanted to install an AHU with a flow rate of 7500m3/h and continuous operation.
Our simulations have shown that the 7500m3/h scenario is clearly not optimised. The energy consumption would be far too high.
We recommended installing an AHU equipped with filters and an air extraction and supply system with a nominal flow rate of 2500m3/h which would make it possible to limit the concentration of CO2 to below 5,000ppm (French Occupational Exposure Limit), whatever the activity in the cold room, while limiting energy consumption.
