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The smart way to reduce energy costs
DeLaval heat recovery system generates warm water using a milk cooling process. This solution can recover up to 60 percent of the heat extracted from cooling milk and convert it to hot water for use in all your pipeline and parlour cleaning.
For every litre of milk cooled, 0.7 litres of warm water is produced. DeLaval heat recovery system generates warm water as soon as the milk cooling process begins. Water pumped through the plate heat exchanger reaches 50°C to 55°C. This temperature is then efficiently maintained in a well insulated storage tank.
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- You need an adequate quantity of hot water (80°C to 85°C) to clean the milking system after each milking and the cooling tank whenever it is emptied. Our heat recovery unit warms water (50°C to 55°C) and an additional heater is installed to make the water hot. When compared to heating tap water directly from 10°C, this dual approach consumes far less energy and that means less cost.
- Warm water sourced straight from the storage tank can be used for manual milk room washing and cleaning together with general household demands like showers or washing your hands.
- Luke-warm water (15°C to 35°C) is a combination of storage tank water mixed with cold water. It can be used to clean udders before milking, as drinking water for cows and calves during winter time and in milk powder preparation for calf feeding.
A farm with 200 cows uses 150 litres of hot water and 500 litres of luke-warm water in its daily routine. The yearly electricity consumption to meet this demand without a heat recovery system is 13 200 kWh. With our system this figure drops to 2 000 kWh. So by using the DeLaval heat recovery system on a farm this size, you could save 11 200 kWh of electricity per year.
The energy recovered from 1000 litres of milk per day over a year generates heat equal to:
- 13 100 kWh of electrical energy
- 1 900 litres of oil
- 1 650 m³ of natural gas
- 950 kg of propane gas
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