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Selected Results of the 1994 ECSCR Comparative Solar Cooker Test and 1998/99 Tests in South Africa

(the following table was taken from page 30 of the gtz-journal. The 'Europea model' tested by gtz in South Africa has the identical mirror design as the AMSI-cooker)

Dimensions (cooking pos.):

143 x 163 x 125 [cm]

Dimensions (cooking pos.):

1 removable pot (12 l)

Test pot content:

 6 liter

Aperture surface:

1.54 m²(reflector)

Heating time (water):
- cold start (40 - 80°C)
- cold start (40 - 96°C)


*27 minutes/**27 minutes/***30 minutes
*44 minutes/**38 minutes/***39 minutes

Max. temperature (oil):

*198°C after 130 minutes

Continuous cooking:

*boils 48 l of water in a day

Heat loss with lid open:

*cools from boiling temperature to 83°C in 15 min

Comments:

excellent thermal performance for a concentrator-type cooker; small
nominal pot content for this size of aperture; requires regular tracking

Handling:

easy, one-step access to pot; easy tracking, but level ground required;
acceptable operation, but difficult to relocate

Application:

cooker for large families and, in modular application, for small institutions;
suitable for cooking and roasting

Evaluation for technology
transfer/local production:

easily reproducible; reflector material must be protected against
corrosion; a folding type of steady stand is under development;
transport and assembly require optimization

Contact address:

easily reproducible; reflector material must be protected against
corrosion; a folding type of steady stand is under development;
transport and assembly require optimization

Legend:

*ECSCR; tested in SA;   **European model,   *** prototype built in SA


The AMSI-cooker has some improvements to the tested cooker model:

  • the welded stand of the cooker is very rigid, so uneven ground is no problem for the stability and the adjustment of the cooker. The cooker may even moved and carryied with a full pot on the cooker.
  • The reflector material is no covered with a special solar-varnish which protects the mirror against corrosion and soft scratching
  • Transport of the cooker has been optimized, as the mirror-part may be easily disconnected from the stand and both parts fit know through small doors to allow for indoor storage.

additional experiences with the AMSI-Cooker in Ethiopia:

Usable Energy: 
  About 600 to 800 Watts (in Ethiopia)
Maximum Temperature: 
  About 200 °C,
dark paper is set to fire immediately, white paper after some time
Time needed to boil water: 
  1 l of water in the traditional clay-pot (jabenna) boils in 8 to 10 minutes
 About 50 liters water can be boiled per day in a 10 liter black pot
Overall cooker size:
Focal distance:
Diameter of the mirror:

   80 cm / 160 cm / 160 cm
   27 cm (from the depth of the mirror to focal-point)
 140 cm (1,54 m²)
Weight: 
  about 34 kg

 

Here you may download a powerpoint-presentation containing more technical data measured with an AMSI-type cooker

Arba Minch is a very good place to harvest the energy from the sun The insolation is 4.6 to 6.3 [kWh/m²/d]
Here you may find the solar-data about Arba Minch.

This is great compared to my plce here in Stuttgart/Europe with 0.7 to 4.1 [kWh/m²/d]
Here you may find the solar-data about Stuttgart.