The overall objectives of the EC Research Programme JOULE
II were to evaluate
the potential of advanced power production systems based
gasification and to study the technical and economic
feasibility of these new
processes with different types of biomass feedstocks.
This report was prepared
as part of a larger R & D project within JOULE II. The
objectives of this
subtask were to design a number power production process
evaluation in the following size classes: farm scale (100
- 300 kWe), small
scale (5 - 10 MWe), medium scale (20 - 30 MWe), and large
scale (40 - 60 MWe);
to determine mass and energy balances for each of the
process concepts, and to
determine the technoeconomic feasibility of the proposed
concepts in the
appropriate size class.
The following conclusions were drawn from the results of
1) New power production systems based on pressurised
gasification and gas
tur-bine cycles may be feasible only in a relatively
large size class.
2) The gasification-diesel concept has, in small size
classes, a potential to
reach higher power production efficiencies than those
reached in conventional
3) Fixed-bed downdraft gasification coupled to a diesel
or spark-ignited engine
is one of the very few technically possible alternatives
to produce electricity
from biomass on a "farm scale".
The main technical uncertainties of the concepts can be
listed as follows:
1) gasifiers requires fur- ther development work.
2) Simplified IGCC technology has so far been tested with
and coal on a pilot scale only, and the behaviour of
residues and energy biomasses is poorly studied.
3) Gas cleaning is considered to be the prime uncertainty
of the concepts.
4) The number of gas turbines applicable for hot
low-heating-value gases is
very small, and none of the present turbines has been
designed especially for
this type of gas.
5) The technical feasibility of the "farm-scale" concept
based on downdraft
gasification is limited to high-quality biomass fuels.
|Place of Publication||Espoo|
|Publisher||VTT Technical Research Centre of Finland|
|Number of pages||52|
|Publication status||Published - 1995|
|MoE publication type||D4 Published development or research report or study|
|Series||VTT Tiedotteita - Meddelanden - Research Notes|
- power generation
- power plants
- JOULE II
- energy balance
- mass balance