BIOS - Bioenergy
  YOUR PARTNER FOR ENERGY FROM BIOMASS AND ENERGY EFFICIENCY  
 

Waste wood-fired combined heat, cooling and power (CHCP) plant based on an ORC cycle and an absorption chiller / BIOSTROM, Fussach - national demonstration project (Vorarlberg, Austria)

Relevant technical data

  • Nominal electric capacity: 1,0 MW
  • Nominal thermal capacities: 6.2 MW (thermal oil boiler + thermal oil ECO) +1.0 MW (pressurised hot water economiser)
  • Nominal chilling capacity - absorption chiller: 2.4 MW
  • Start of operation: 2002

Biomass CHP plant with absorption chiller Fussach – acts and facts

Fuel power input (including 20% power reserve) 9,750 kW
Fuel power input (nominal power) 7,800 kW
Nominal power thermal oil boiler and thermal oil ECO 6,200 kW
Nominal power hot water ECO 1,000 kW
Usable thermal power (district and process heat) 5,800 kW
Net electric power ORC 1,100 kW
Thermal driving power of the absorption chiller 3,200 kW
Cooling power of the absorption chiller 2,400 kW
Future expansion potential of district heat and process heat 2,600 kW
Production of heat from biomass 43,500 MWh/a
Production of electricity from biomass 8,250 MWh/a
Production of cold from biomass 18,000 MWh/a

Biomass CHP plant with absorption chiller Fussach – primary energy input and investment costs

Primary energy input    
Waste wood - amount (quality classes Q1 – Q4 according to the Austrian wood qualification system) 78,000 Srm/a
Waste wood - primary energy (NCV) 58,500 MWh/a
Investment costs    
CHP plant 6.14 Mio €
Cooling station 1.35 Mio €
District heating grid to the cooling station 0.50 Mio €

Biomass CHP plant with absorption chiller Fussach – technological innovations

  • First biomass CHP plant based on an ORC cycle combined with an absorp-tion chiller for power production and cooling worldwide
  • Waste wood treatment with metal and non-metal separation
  • Low-NOx waste wood furnace with CFD optimised geometry
  • Thermal oil boiler with separate radiative and convective sections and an automatic cleaning system
  • Highly efficient fibrous filter with integrated dry sorption
  • Production of electricity from waste wood
  • Optimised coupling of the ORC cycle and the absorption chiller
Fig. 1 - Biomass CHP plant with absorption chiller Fussach - scheme of the overall plant
Fig. 2 - click to zoom
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Fig. 6 – Biomass CHP plant with absorption chiller Fussach – scheme of the flue gas cleaning system
Fig. 7 - click to zoom
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Biomass CHP plant with absorption chiller Fussach – technical data of the absorption chiller

Thermal driving power 3,200 kW
Heating medium Hot water
Required hot water temperature (feed) 70-83° C
Cooling power 2,400 kW
Cold water temperature (water outlet) 5° C
Cold water temperature (water inlet) 8° C
Cooling medium Lithiumbromide/water
Performance number 0.75
Fig. 12 – Biomass CHP plant with absorption chiller Fussach – total view of the absorption chiller
Fig. 13 – Biomass CHP plant with absorption chiller Fussach – energy balance of the overall plant