Energetische Nutzung halmgutartiger Biomasse - Abfallratgeber ...

Energetische Nutzung halmgutartiger Biomasse: Stand der Technik und Perspektiven
that the district heating system is large enough to allow for 8000 full load
hours per year.
Since the subvention of the power price is only ensured for a period of
10 years, the same duration is chosen for the loan and depreciation
period.
In spite of the high operating hours and the additional income from
the sale of district heating the net present value is still negative after 10
years, indicating that the plant owner is running a considerable risk in
building the plant. The example illustrates that substantial subventions
for straw-fired CHPs are unavoidable if straw is expected to contribute to
the ambitious goals of the EU. In Denmark the incentives for establishing
stand-alone straw-fired CHP plants are not sufficient to ensure that new
plants will be built in the future, and stand-alone CHP's cannot compete
with co-firing of straw, which achieve similar incentives.
6 Summary and Conclusions
For many years, Tech-wise has been a major actor on the Danish CHP and
biomass scene and in the latest decade Tech-wise has acquired an extensive
knowledge in utilising straw and other types of biomass as fuel in the
combined production of heat and power. An extensive R&D programme
has been paralleled by establishing full-scale plants providing many
years of operating experience.
The experience gained shows that although straw exhibits problematic
behaviour mainly as a result of its physical/chemical properties, utilisation
is technically feasible if a number of important aspects are taken
into consideration when a plant is designed. The most important aspects
are described in this paper.
Facing the prices of the liberalised power market and some of the competing
renewable technologies, straw-fired CHPs will need economic
assistance in the form of subventions and/or tax incentives.
If the incentives are sufficient, straw can contribute to the ambitious
goals of the EU. Furthermore, a biomass/straw-fired CHP is an excellent
opportunity for a local community to create local activity and employment,
and at the same time pay a positive contribution to the ongoing
battle against the pollution from energy production.
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