The hot air turbine, a technological innovation
The process combines a gas generator and a hot-air turbine through a heat exchanger.Wood chips fuel a co-current gasifier generating an optimal quality syngas burned in an associated combustion chamber. The heat of the flue gases is recovered in a heat exchanger to heat a compressed air stream.
This stream is expanded in a turbine which rotates the compressor and the generator thereby producing electricity. The hot air turbine outlet is reused for gas combustion, which increases power generation performance.
The co-generated heat is available at the output of the exchanger in the form of a gas at 300 °C for a production of hot water, superheated water, low pressure steam or direct drying.
Rejects of the process are cooled exhaust gases that leave the chimney with a very low NOx, CO and particles content, as well as the ashes retrieved at the bottom of the gasifier.