Our Research Evaporative cooling technologies for fruit and vegetable preservation in Kenya

Challenge:

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 electricity, which is may be unaffordable or not available for many smallholder farmers, especially those living in remote areas on less than $3 a day.

Research Strategy

  • Use computational models to design improved room-sized Evaporative Cooling Chambers (ECCs) for farming cooperatives
  • Construct innovative ECCs for demonstrations on the University of Nairobi campus and at farmer cooperatives in rural Kenya
  • Use data logging sensors to measure the ambient temperature and humidity, interior temperature and humidity of the evaporative cooling chamber, and the moisture of the water retaining materials
  • Interview users to identify factors leading to adoption of the technologies

Project description

Evaporative Cooling Chambers (ECCs) can improve vegetable storage shelf life by providing a stable storage environment with low temperature and high humidity, which reduces the rate of respiration, water loss, and spoilage in most vegetables. The improved storage environment can have positive impacts including reduced post-harvest losses, less time spent traveling to the market, monetary savings, and increased availability of vegetables for consumption. ECCs are particularly suited for hot, dry regions and countries with some access to water and limited or unaffordable access to electricity, such as rural Kenya.

The research is being conducted in partnership with researchers from the University of Nairobi’s Department of Plant Science and Crop Protection, who have extensive experience working with low-income rural communities on issues related to horticulture and improving livelihoods.

The collaborative team from MIT and University of Nairobi is building and testing innovative designs for room-sized evaporative cooling chambers in rural Kenya for farming cooperatives whose primary product is mangoes. The computational heat and mass transfer models developed for clay pot cooler evaporative cooling devices will be used to predict the behavior of larger scale evaporative cooling chambers. The goal of this project is to optimize the design for performance, practical construction, and user preferences to meet the needs of smallholder farmers in low-income, rural communities in Kenya and better understand user behavior and pathways to adoption.

Additional Details

Impact Areas

  • Food

Research Themes

  • Sensors & Monitoring
  • Technology & Commercialization
  • Transforming Food Systems
  • Modeling & Data Analytics
  • Equity & Access

Year Funded

  • 2019

Grant Type

  • Seed Grant

Status

  • Ongoing