Chosing the right design parameters for a combined heat and power plant or a power plant, depends on many parameters; ambient conditions, fuel, boiler, turbine etc.
Aalborg Energie Technik a/s (AET) assists you in optimising the plant parameters and not only on the boiler paramaters. The employees at AET have many years of experience and extensive experience with steam cycles and steam turbines.
Boiler Parameters
The AET boilers are designed for all forms of biomass, particularly wood chips, demolition wood, waste wood, sawdust, sander dust, railway sleepers, cuttings from forests, olive stones, shea nuts, and bark as well as straw, poultry litter, compost, sludge, meat and bone meal etc.
It is up to the customer to choose the most feasible fuels for each case; a process, in which assistance can be given by AET. The design parameters below describe the basis of our plants:
| Fuel heat power | 25 - 170 MW |
| Steam boiler | Water tube boiler with natural circulation |
| Steam pressure | Up to 140 bar |
| Steam temperature | Up to 540°C |
| Steam quality | According to VGB requirements for turbine operation |
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| Furnace design | Residence time more than 2 sec. above 850°C |
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| Operating time | At least 8000 hours without shutdown for manual cleaning |
| Boiler efficiency | > 91% according to EN 12952-15 |
| Emission values | Better than European demands (large boiler or WID) |
| Turndown | Better than 1:5 |
| Fuel flexibility | Fuel moisture content 10 - 55% |
| Auxiliary burner | Not necessary |
| In house power consumption | < 1,5 % of fuel heat input |
| Availability | Better than 98 % |
Power Plant ParametersThe AET power plants are designed for all forms of biomass, with a high electrical efficiency, very stable electricity production and extremely high availability in order to ensure a good business case for the investor. The design parameters below describe the basis of our plants:
| Electrical power output | 7 - 55 MWe |
| Net electrical efficiency | 28 - 35 % |
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| Operating time | At least 8000 hours without shutdown for manual cleaning |
| Boiler efficiency | > 91% according to EN 12952-15 |
| Emission values | Better than European demands (large boiler or WID) |
| Fuel flexibility | Fuel moisture content 10 - 55 % |
| Auxiliary burner | Not necessary |
| In house power consumption | < 9 % of fuel heat input |
| Availability | Better than 96 % |
See also AET Power Plants:
Western Wood Energy Plant
Combined Heat and Power Plant Parameters
The AET combined heat and power (CHP) plants are designed for all forms of biomass. The high electrical efficiency, very stable electricity production and extremely high availability ensures a good business case for the investor. The design parameters below describe the basis of our plants:
| Electrical power output | 7 - 55 MWe |
| Net plant efficiency | 55 - 90 % - depending of steam need
80 - 105 % - depending of district heating need |
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| Operating time | At least 8000 hours without shutdown for manual cleaning |
| Boiler efficiency | > 91% according to EN 12952-15 |
| Emission values | Better than European demands (large boiler or WID) |
| Fuel flexibility | Fuel moisture content 10 - 55 % |
| Auxiliary burner | Not necessary |
| In house power consumption | < 9 % of fuel heat input |
| Availability | Better than 96 % |
See also AET Cogeneration Plants:
Example of the heat balance. 