Apple farmers in the north of Italy are using natural refrigerators carved under a hillside to store their harvest in a controlled environment that remains at a constant temperature in all seasons.
Three hundred metres beneath their fruit orchards in Predaia, a small town in the Trentino region, the Melinda group has created 34 refrigeration areas in vast caves, where they are able to keep 12-13% of their produce and cut their energy costs.
"One of them is definitely in terms of energy levels, because from a test done last year...we measured a 32% saving of electricity in the cave." Erlicher explained how large refrigeration storage chambers above ground use a “sandwich panel” insulated with polyurethane and sheets of metal to keep the inside cool.Before the caves can be used, the rocks are cooled with a gas to a depth of 5-7 metres which means they then maintain a constant temperature of 1 degree Celsius .
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