Milk cooler for rural and peri-urban smallholder dairy farmers with no access to grid electricity, that can cool milk to 4-6 °C for 12 hours.
Currently in pilot distribution phase: Cost of 70 liter product will be around $300 USD. Other cost may be $800. Farmers can rent-to-own products.
Fine Lined Evaporative Cooler (by Dominic Wanjihia), Rapid Milk Chiller (from Promethean Power systems), kerosene fridges available locally.
Goal 2: improve food security and nutrition. Reduce gastrointestinal issues due to bacteria growth in poorly preserved milk.
Small-scale rural and peri-urban dairy farmers in areas with intermittent or no electricity, predominantly in Africa and Asia. Thermogenn’s initial target market is Uganda, where there are an estimated 2.9M smallholder dairy farmers, who own an average of 4 cows each, producing an average of 60 liters of milk per day. About half of this milk is produced in the evening and needs cold storage until the next day when it can be transported and sold.
Specialized production in partnership with Cool-System.
Other: Currently only available as a prototype
Directly from designer. Prototype product
Product is currently deployed to Uganda – 15 Ugandan farmers as of 2010.
The holding volume, measured in liters
Length of time it takes to cool products, measured in hours
Time the products remain cold, measured in hours
Is there a way to control temperature?
Maximum internal temperature, measured in degrees Celsius
The materials used in construction
Does the product prevent insects from entering the chamber?
What is the medium for cooling?
• A milk canister is placed inside a cylinder filled with water, and an external vacuum sucks the water out, vaporizing it and reducing the canister’s temperature through a process called evaporative cooling.
• The vacuum is created by a highly absorptive mineral called zeolite, which allows the cooler to operate without power.
• External energy used to heat up the zeolite to dry it out so it can absorb more water. Thermogenn sees propane as the most viable heating solution, since there is already a supply chain set up, but has been encouraged by the World Bank and potential investors to experiment with biogas digesters, as these have positive climate change benefits and can generate carbon credits.
• CoolChurn content: 15 L
Please see the image
None provided, however Thermogenn is currently building a demonstration and training center outside of Kampala where they will manufacture and store coolers, have a working model to show people, and experiment with technologies such as biogas digesters.
• Cooling of the milk to 4-6 °C within 3-4 hours
• Cooling “at the push of a button”: the farmer starts the cooling of the milk if required
• The temperature will be kept for at least 12 hours.
University of Georgia– ENGR 4920: Engineering design project (international section, with service-learning component), offered in spring. Taught by William Kisaalita.
Physical cooling with zeolite-water-adsorption – not hazardous by nature. Food will not stay preserved forever.
This technology benefits from being paired with a biogas generator. Biogas is an abundant source of renewable energy made from cow dung but requires a local biogas plant.
Comparative feasibility analysis of alternative renewable energy sources for small milk cooling plants of Southwestern Uganda. Kisaalita, W. S. et.al. Comparative feasibility analysis of alternative renewable energy sources for small milk cooling plants of Southwestern Uganda, AMA, Agricultural Mechanization in Asia, Africa and Latin America 2006 Vol. 37 No. 4 pp. 69-75.
Uganda National Bureau of Standards – Code of Hygienic Practice for Milk and Milk Products: 5.8 Collecting and storage raw milk
World Trade Organization, Codex Committee on Milk and Milk Products – Codex Recommended International Code of Practice General Principles of Food Hygiene; FAO/WHO, 2003 (pg.130)
List of awards: 2009 World Bank Development Marketplace Award, 2011 EPA 3P Sustainability Design Award, 2011 Santa Clara Global Social Benefit Incubator
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