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
Link: 
The ORC-process
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. 3
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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
- Fig. 8
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- Fig. 11
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