Malena
Manufacturer
Locally manufactured
Inbuilt fixed (sunken) two pots stove for households and social institutions; made of improved clay mix with 2 meters metal chimney and ceramic grid. Includes a rocket type combustion chamber, ceramic grid for the fuel located inside the combustion chamber, ashes trap for cleaning and air flow, internal air and gases circulation ducts of standard dimensions. Supported by the EnDev Bolivia/GIZ project.
IWA tiers of performance
Information for consumers
Maximum pot capacity
10 L
Approximate lifetime
5 years
People fed per meal
1-5
Pot type accommodated
(Flat bottom/Round bottom)
(Flat bottom/Round bottom)
Both
Countries deployed
Bolivia
Common foods cooked
boiling and fried food
Manufacturer's warranty available?
No
General information
Manufactured in
Bolivia
Suggested retail price
USD 50-70
Dimensions (l/w/h)
900/600/800 mm
Weight
800.0 kg
Shipping dimensions
not available
Shipping weight
not available
Local assembly possible?
Yes
Materials needed for local assembly
Improved clay mix, bricks, local materials for molds like empty oil drums, big bags, sacks and cardboard
Includes instructions?
Yes
Instruction details
Before construction, construction guides are delivered to the local builders and clay preparation brochures to the families in idiomatic Spanish. These instructions contain a step-by-step guide with pictures and drawing for the construction process.
Other information
Warranty depends on local materials like improved clay mix
Characteristics
Non-traditional, Household, Built in place, Rocket, Chimney, Sunken pot, Side-feed
Fuels
Dung, Wood
Materials
Brick, Ceramic, Clay, Metal
Performance details
IWA emissions
| Metric | Min value | Max value | Number of tests |
|---|---|---|---|
| IWA high power CO | 12.17 g/MJ-del | 12.17 g/MJ-del | 1 |
| IWA high power PM | 61.1 mg/MJ-del | 61.1 mg/MJ-del | 1 |
| IWA low power CO | 0.06 g/min/L | 0.06 g/min/L | 1 |
| IWA low power PM | 0.3 mg/min/L | 0.3 mg/min/L | 1 |
IWA efficiency
| Metric | Min value | Max value | Number of tests |
|---|---|---|---|
| IWA high power thermal efficiency | 0.25 % | 0.25 % | 1 |
| IWA low power specific consumption | 0.03 MJ/min/L | 0.03 MJ/min/L | 1 |
IWA indoor emissions
| Metric | Min value | Max value | Number of tests |
|---|---|---|---|
| IWA CO | 0.12 g/min | 0.12 g/min | 1 |
| IWA PM | 0.6 mg/min | 0.6 mg/min | 1 |
Efficiency, energy consumption and fuel use
| Metric | Min value | Max value | Number of tests |
|---|---|---|---|
| Cold start thermal efficiency | 0.22 % | 0.22 % | 1 |
| Hot start thermal efficiency | 0.28 % | 0.28 % | 1 |
| Simmer thermal efficiency | 0.21 % | 0.21 % | 1 |
| Specific fuel consumption cold start | 89.01 g/L | 89.01 g/L | 1 |
| Specific fuel consumption hot start | 64.81 g/L | 64.81 g/L | 1 |
| Temp-corrected specific consumption cold start | 93.18 g/L | 93.18 g/L | 1 |
| Temp-corrected specific consumption hot start | 71.01 g/L | 71.01 g/L | 1 |
| Temp-corrected specific energy cons cold start | 1717.34 kJ/L | 1717.34 kJ/L | 1 |
| Temp-corrected specific energy cons hot start | 1308.63 kJ/L | 1308.63 kJ/L | 1 |
| Burning rate hot start | 22.74 g/min | 22.74 g/min | 1 |
| Burning rate cold start | 21.88 g/min | 21.88 g/min | 1 |
| Burning rate simmer | 13.75 g/min | 13.75 g/min | 1 |
| Specific fuel consumption simmer | 95.49 g/L | 95.49 g/L | 1 |
| Temp-corrected specific energy cons simmer | 1759.95 kJ/L | 1759.95 kJ/L | 1 |
Output
| Metric | Min value | Max value | Number of tests |
|---|---|---|---|
| Cold start firepower | 6722.02 W | 6722.02 W | 1 |
| Hot start firepower | 6984.07 W | 6984.07 W | 1 |
| Simmer firepower | 4223.74 W | 4223.74 W | 1 |
| Time to boil cold start | 30.5 min | 30.5 min | 1 |
| Time to boil hot start | 20.75 min | 20.75 min | 1 |
| Temp-corrected time to boil cold start | 31.95 min | 31.95 min | 1 |
| Temp-corrected time to boil hot start | 22.78 min | 22.78 min | 1 |
| Turn down ratio | 1.849 | 1.849 | 1 |
Safety metrics
| Metric | Min value | Max value | Number of tests |
|---|---|---|---|
| Sharp edges and points rating | 4.0 | 4.0 | 1 |
| Cookstove tipping rating | 4.0 | 4.0 | 1 |
| Containment of fuel rating | 3.0 | 3.0 | 1 |
| Obstructions near cooking surface rating | 4.0 | 4.0 | 1 |
| Surface temperature rating | 4.0 | 4.0 | 1 |
| Heat transmission to surroundings rating | 4.0 | 4.0 | 1 |
| Temperature of operational construction rating | 3.0 | 3.0 | 1 |
| Chimney shielding rating | 2.0 | 2.0 | 1 |
| Flames surrounding cookpot rating | 4.0 | 4.0 | 1 |
| Flames or fuel exiting chamber rating | 4.0 | 4.0 | 1 |
| Total safety score | 90.5 points | 90.5 points | 1 |