Cover Image
close this bookLow Cost Charcoal Gasifiers for Rural Energy Supply (GTZ, 1994, 49 p.)
close this folder6. Technical performance of the ferrocement gasifier
View the document6.1 Design details
View the document6.2 Performance data

6.2 Performance data

In table 1, data are listed which were measured at the operation of a standardized gasifier in ferrocement construction, designed for a power range of 2-10 kW. These data are derived from test series, carried out in the laboratory of FLEUS (Bremen University). More detailled data sets can be derived from the project report for BMFT [ 12].


The performance data largely depend on the mechanical resp. electrical load, connected to the engine. The values in table I resulted when a 6-cylinder engine with 2.0 cylinder volume and a speed of 2,500 rpm was connected, linked to a 3-phase alternator powering an electrical load (stove plates).

Diagr. 1 and 2 show very clear that the "nominal operation" of the gasifier has to be defined clearly. In diagr. 1 the specific fuel consumption of the ferrocement gasifier is plotted for three load situations (2, 6 and 10 kW). At 10 kW (which is a bit below the maximum power of 12 kW, which can be reached with he 2 liter engine) the fuel consumption per kWh is much less than at the load 2 kW. This is reflected as well in the overall efficiency of the system (the relation of usable electric energy to the energy content of the fuel): The efficiency is much better on 10 kW than on 2 kW.


This tendency is obviously common to all types of gasifiers and has to be recognized:

A gasifier has a narrow range of optimum performance. A deviation from the optimum working condition results in less efficient use of fuel, less operational stability, and less economic viability.