Heating Value

The results of field testing the POCA/Maputo Ceramic Stove (MCS) and traditional metal stoves (TMS) using an uncontrolled cooking test (UCT) are attached. In a UCT people cook whatever they want and we watch carefully. The results have fuel-moisture compensated values. The charcoal was almost always hardwood lumps. Larger meals tend to be watery and small meals tend to be frying something in oil.

The comparison indicates a clear change in relative performance with meal size. The bigger the meal, the more the savings with the improved stove. There is also a chart attached showing the increase in thermal efficiency with meal size.

The meal size on one the X-axis.

The WBT locates one point on the line. Performing the test seven times locates that point very accurately but is it difficult to know where the line goes from that point.

No ‘outliers’ were removed in this analysis even when they were obvious. The meal size varies with the season so the question about consumption has more than one answer.

Regards
Crispin

Dry Fuel Equivalent Calculator
Crispin and Nigel Pemberton-Pigott, October 2007

Calculating the LHV for Biomass and Coal
Thomas Reed, Biomass Energy Foundation, October 1, 2007 to the Biomass Cooking Stoves List

Basics on Combustion: Concepts and Calculations

Basics on Combustion: Concepts and Calculations
Kanchan Rai, Nepal July 2004

Prepared By: Kanchan Rai. Email: 052494@student.hit.no

Here is my effort to share my knowledge on
combustion theories. Online calculation is available for each topic (you can input data only on white cell and click calculate)  Need flash player to do the online calculations.
Click here to download the flash player

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