Biomass condensing turbo alternator circuit
This steam circuit turbo alternator diagram represents a biomass-fired condensing power plant. Wood chips fuel the boiler, which produces superheated steam at 65 bar and 480 C. A condensing turbine converts that steam energy into shaft power for the alternator. Its electrical output passes through a generator step-up transformer to a 33 kV export feeder.
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Scenario
A biomass power station prioritizes electrical export rather than process-steam supply. The turbine exhaust is condensed under vacuum and the water is recovered to the boiler feedwater train.
Key decisions
- Condensing turbine: Exhaust heat is rejected in a surface condenser to maximize electrical expansion.
- Steam conditions: The boiler and superheater supply 65 bar, 480 C steam.
- Voltage transformation: The generator output is stepped up for a 33 kV export feeder.
- Water recovery: Condensate moves through a hotwell, deaerator, and feed pump before boiler return.
When to reuse this
Use this template for a standalone biomass generator with a condensing turbine and grid export. It contrasts with a backpressure cogeneration circuit that supplies process steam.
Frequently asked questions
Why is the turbine called condensing?
What is the hotwell?
Why step up generator voltage?
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