Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 61389
Title Willow supply strategies to energy plants
Author(s) Gigler, J.K.; Meerdink, G.; Hendrix, E.M.T.
Source Biomass and Bioenergy 16 (1999). - ISSN 0961-9534 - p. 185 - 198.
DOI http://dx.doi.org/10.1016/S0961-9534(99)00041-0
Department(s) Institute of Agricultural and Environmental Engineering
Biometris (WU MAT)
Integrated Food Science and Food Physics
MGS
VLAG
Publication type Refereed Article in a scientific journal
Publication year 1999
Abstract The main objective of this study was to develop minimum cost supply strategies for willow to energy plants (two plant sizes: 0.5 and 30 MWe, two energy conversion technologies: combustion and gasification). Time span between harvest and energy conversion varied from 1 to 12 months. For a realistic comparison, different supply chains were based on the same initial characteristics (i.e., moisture content 50% wb at harvest) and final fuel specifications at the energy plant (moisture content 20% wb, particle size chips or chunks). Cost calculations were based on the integral cost calculation method and were presented for all process steps. The main conclusion was that the time span between harvest and energy conversion and the size and conversion technology of the energy plant largely influence the design of the supply chain and consequently the supply costs. The fuel supply costs ranged from 17.6 to 26.1 ECU/t DM (where DM stands for oven dry matter) or 0.010 to 0.023 ECU/kWh. The cost reduction which could be achieved by choosing the minimum cost chain design could be as high as 45% or 14.4 ECU/t DM. Generally, the strategy of minimum costs for supply of fuel to an energy plant running all year round on willow was as follows: … for farmers who should supply their willow within 6 months after harvest: harvest as chips, forced drying at the farm and transport (if necessary); … for farmers who should supply their willow beyond 6 months after harvest: harvest as chunks or stems, natural drying near the willow field, transport (if necessary) and central chipping (if applicable).
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