Our Research Piloting evaporative cooling technologies to improve vegetable shelf-life and farmer income in Western India


In India, 30% of the fruit and vegetables cultivated annually are lost due to spoilage. The annual post-harvest fruit and vegetable losses in Gujarat alone amounted to $1.8 billion. The lack of postharvest fruit and vegetable cooling and storage solutions available to smallholder farmers results in food spoilage, reduced income, and wasted time and labor.

Research Strategy

  • Construct demonstration evaporative cooling chambers at three locations in Gujarat for use by members of farming cooperatives in need of improved vegetable storage
  • 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 sand used to retain water
  • Conduct interviews with farmers who are users of evaporative cooling chambers to understand how the devices are being used and the value they create for farmers

Project description

In hot and dry regions, storing fruits and vegetables at lower temperatures and high relative humidity environments can drastically increase their shelf life. Most techniques for cooling and storing fruits and vegetables rely on electricity, which even if available, may be prohibitively expensive to farmers living in remote areas on less than $3 a day. The solution proposed by this research team is a storage technology that uses the natural evaporation of water to create a cool and humid environment that prevents rot and dehydration, all without the need for electricity. Working with the CInI (an Initiative of Tata Trust, India), MIT D-Lab will construct demonstration evaporative cooling chambers designed to meet the needs of smallholder farmers in low-income, rural communities in Gujarat, India. Data logging sensors will be used to monitor the performance of the evaporative cooling chambers, and interviews with farmers using the devices will be conducted to understand how the devices are being used and the value they create for farmers. This project will build evidence for funders and implementing organizations to support the dissemination of these technologies that address postharvest storage challenges.


  • Three brick evaporative cooling chambers were constructed in three villages, and one farmer constructed his own chamber with the same design 
  • Sensors were installed on the brick evaporative cooling chambers to monitor (retrieval and analysis of the data is planned)
  • Interviews with 13 farmers who used the evaporative cooling chambers were conducted (additional interviews are planned)

Additional Details

Impact Areas

  • Food

Research Themes

  • Sensors & Monitoring
  • Technology & Commercialization
  • Transforming Food Systems
  • Equity & Access

Year Funded

  • 2019

Grant Type

  • India Grant


  • Completed