Solar Milk Cooling with Insulated Milk Cans

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Description

The milk cooling solution developed by the University of Hohenheim is based on a commercially available DC Refrigerator equipped with an adaptive control unit for its conversion to a smart ice-maker that operates depending on the availability of solar energy. The ice-maker has a volume of 160l and is capable of producing approx. 8-13 kg ice per day. One system includes 25 reusable plastic blocks of 2 kg capacity and two 30l isolated milk cans with removable ice  compartment. To cool down 30l of milk from 36°C to 15°C in one of the supplied milk cans, the systems needs 6kg of ice and 90 minutes.

The smart ice-maker is powered by 600Wp solar PV modules together with two batteries with a total capacity of around 1.5Kwh. Thanks to the thermal energy storage, in form of the 25 2kg-Ice-blocks, the system is able to run autonomously for up to 7 days even during periods of low solar radiation and high ambient temperatures.


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Coolaboration partners

University of Hohenheim

Phaesun GmbH

ICARDA

INRAT

GIZ

BMZ

Project implementations

Field Testing of an Innovative Solar Powered Milk Cooling Solution for the higher Efficiency of the Dairy Subsector in Tunisia