Solution

The ServedOnSalt Bean Cooker

The ultra-clean alternative for cooking heavy foods

The ServedOnSalt is a heat battery that stores solar power for clean cooking of heavy foods such as beans or maize. The heat batteries are cold when charged, and can be carried home to cook indoors without smoke, flames or soothing.

At ServedOnSalt, our mission is to develop the new clean alternative to firewood and charcoal for urban settlements.


The Solution

How the ServedOnSalt cooker works

The ServedOnSalt battery is a container filled with a special salt.

Energy is stored in the battery by heating up the salt using solar power. When you are ready to cook, simply inject water into the salt container. Due to a chemical reaction between the salt and the water, a large amount of heat is released.

The container gets hot and can now be used as a hotplate.

With salt hydration, energy can be stored as thermochemical energy. It has unlimited storage time and can be released at high temperatures by adding water.


The Technology

A new take on energy storage

Storage solutions using lithium batteries and molten salt technology is already on the market, but salt hydration offers potential advantages in term of costs, energy density and storage time.

Thermochemical energy storage (TCES)

  • Large amount of energy
  • High temperatures
  • Long storage time
  • Simple materials
  • Recyclable

Compared to Phase Change Materials (PCM)

  • No loss of capacity during storage gives infinite storage time
  • Salt is not hot when charged, and is therefore easy to handle

Compared to Lithium Batteries

  • The salt is a natural mineral available in abundance in most regions in the world
  • Requires no rare earth minerals
  • Can be produced in most countries and assembled locally
  • Can be charged with external heat


The Distribution Model

Affordability through Pay-As-You-Cook

One of the biggest barriers for adoption of modern cooking technologies is the need to invest in a new equipment. We will tackle this issue with a product-service system approach, where the customer does not buy the cooker, but pays for using it on a daily basis – exactly like how charcoal or firewood is purchased.

The batteries are charged daily at a station in the neighbourhood, and stores enough energy for one full day of cooking. Customers will pay a small startup fee to get access to the cooker, and a small daily amount for the charging service.

No investment in equipment – just cooking.