d-lab.mit.edu/research/evapora...-cooling-chambers
Storing vegetables after harvest without cooling them can lead to spoilage and reduced income for farmers. Most techniques for cooling and storing vegetables rely on vapor-compression refrigeration, which may be unaffordable or not available for many smallholder farmers, especially those living in remote areas on less than $3 a day. Systems that rely on evaporative cooling are particularly suited for hot, dry regions and countries with some access to water and limited or costly electricity, such as rural Kenya.