A gasification installation for “Whitefield Energy”
Client – Whitefield Energy d.o.o.
Address – Bjeloplje 65, 53230 Korenica, Croatia
Business branch – Wood processing
Technology – Biomass gasification + CHP
Biomass source – Wood scrap
Syngas production – 2200 Nm³/h
Fuel – Syngas
Electrical power output – 1000 kWe
Thermal power output – 1800 kWth
Electrical efficiency – 33.5%
Thermal efficiency – 50.7%
Date of Completion – June 2017
Whitefield Energy, a comprehensive partnership
Upgrade Energy has partnered with Pergament to form Whitefield Energy d.o.o. Pergament is a wood cultivating, harvesting and processing company in Croatia. All the wood waste from Pergament’s production processes are used efficiently and turned into energy in the Whitefield Energy gasification plant.
What is gasification?
Gasification is a thermal process that converts organic, wood-like waste (such as wood, wood scrap, shells, hulls and pellets) into a renewable combustible gas. This is achieved by reacting the material at high temperatures, without combusting it, using a controlled oxygen inlet. The resulting gas mixture is called syngas. Syngas can be burned directly in CHP (combined heat and power) gas engines for the simultaneous production of heat and electricity.
How the installation works
The gasification system is paired with a CHP system, so the syngas is being produced locally, in the same place where it used to generate green power. The heat coming from the CHP engines is used in the syngas production process. This results in no transmission or distribution losses.
The installation consists of two main stages:
- The production of clean gas (gasification process)
Around 1000 kg per hour of unusable wood coming from the saw mill is fed into the machine, which delivers about 2200 Nm³ per hour of syngas.
- The combustion of that gas in a CHP engine to produce heat and electricity
The CHP unit, in this case, consists of 4 engines (of 250 kW each) powered by the syngas and are coupled to an electric generator, which produces 1000 kW of electricity. Waste heat of 1070 kW from the motor bloc and exhaust gas is released at the same time. This heat is used partly to dry the wood in the production facility of the saw mill, but mainly it is used for drying the wood to be gasified.
The electricity generated is then injected into the national grid in return of a feed-in tariff.
A green technology
A gasification installation has several significant benefits.
- Conversion of organic waste into renewable fuel
- CO2 neutral technology
- Free quality fertilizer as by-product
- More independence from the volatile energy market
- Secure source of electricity and heat
- No transmission losses of fuel or electricity
- Reduced heat costs by using waste heat as a free energy source
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