» Technology Profiles
» TWIN OR SINGLE HYBRID ENERGY SAVING STOVES
Description and characteristics
The twin or single hybrid energy saving stove is an improvement over existing traditional stoves with emphasis on the mode of air flow to facilitate combustion and enhance efficiency.  It consists of the following units:
  1. Basement
  2. Air inlet coupled with air flow facilitator
  3. Fuel inlet
  4. Fire box with perforated/drilled fire grate
  5. Chimney
The firebox unlike traditional stoves is raised and seated on a basement/platform with an opening called air flow facilitator. Outside air flows through the air flow facilitator and bottom of the firebox where the perforated fire grate is located and out through the chimney. The firebox is made of hollow burnt bricks and formed in a circular manner to a pre-defined height.  The hollow bricks are finally filled with insulation materials like ashes.  The insulation enhances good combustion and hence guarantees maximum utilization of the heat generated. This stove is energy efficient, and enhance clean cooking.

How the technology works

Fuelwood, preferably split logs are fed into the firebox via the fuel inlet (an opening in the front of the firebox with a sliding lid) and lit with the help of kerosene or petrol after which the firebox opening is closed.  The air inlet and chimney system pulls the air into the firebox to facilitate and ensure the continuous and efficient combustion of the fuel.  The chimney also vents the smoke and hence drastically decreases indoor air pollution.  With less fume and smoke emission, the efficient stove cause less respiratory ailments in children and adults.  .

Market potential
The energy-efficient hybrid stoves are designed and constructed using improved local materials. With its unique features, the energy-efficient hybrid stoves reduces the amount of fuel required for cooking by about 25% through improved insulation of the firebox. It is very convenient to use with better fire management. It is recommended for LP Gas-starved communities and institutions.

Challenges and opportunities
The major challenge is the investment capital for the construction of the stoves and the funding platform for dissemination of the technology. Institutions (schools, restaurants, food venders, local enterprises that use heating etc.), LP Gas starved communities and entrepreneurs have shown keen interest in the technology.

Collaboration and funding
This technology was developed and funded by CSIR-IIR. On request by some institutions like the Ankafo prison and other projects, the technology has been established in those institutions and some farming groups.
Dissemination strategies and diffusion
Diffusion of the technology has been done through Gari processing associations, institutions such as prison services and schools. The technology has been presented at several conferences and seminars in the country and a couple of nearby countries.

Users of the technology
  • Institutions (schools, restaurants, etc)
  • LP Gas starved communities
  • Food vendors    
  • Local enterprises that uses fire for processing/cooking (eg. Gari and rice processing enterprises)
  • NGO’s into local enterprise developments and environmental management programes