Monday 23 April 2018

The lengths we go to...

Testing freezers.
Testing freezers.

When it comes to testing freezers, it is important to find out how quickly each appliance will freeze a load of food placed inside and how long it will keep that food frozen in the event of a power cut.

In our labs, each freezer model is run in for at least 24 hours in a room in which the ambient temperature is 25°C.

Testers then load the freezer with gel packs - to which are fitted temperature sensors - to simulate the food that would typically be stored in these appliances. Tests involve measuring the length of time it takes for a heavy load (20kg/100l of net volume) and a light load (4kg/100l of net volume) of gel packs to reach -16°C and -18°C.

To gauge how well insulated the freezer is, our testers fill the freezer with gel packs and allow them to reach -18°C before turning off the power to simulate a power cut. Measurements are then taken for how long before the temperature rises to -9°C - the point at which food would need to be thrown away.

Irish Independent

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