North-East Spain, Borges
Energy
wood chips
Borges hybrid solar-biomass power plant | 2012
2x 25 MW
2x 19.5 MW
290 °C | 390 °C
360°C
40 barg
40 barg | 134°C
The world's first hybrid solar-biomass energy system of this kind
In 2011 we were commissioned to plan and deliver a turnkey biomass incineration plant (BMIP). The system with a total thermal output of 50 MW (2x 25 MW) is integrated into a solar field with parabolic mirrors and works in parallel operation. This biomass hybrid solar power plant went online in 2013 and was the first hybrid power plant of its kind in the world at the time.
During [...]
The world's first hybrid solar-biomass energy system of this kind
In 2011 we were commissioned to plan and deliver a turnkey biomass incineration plant (BMIP). The system with a total thermal output of 50 MW (2x 25 MW) is integrated into a solar field with parabolic mirrors and works in parallel operation. This biomass hybrid solar power plant went online in 2013 and was the first hybrid power plant of its kind in the world at the time.
During the day, electricity is generated by solar energy. Tracked collectors concentrate the incident sunlight and heat a synthetic heat transfer oil (Therminol-VP1) to almost 400°C at their focal point.
The heated heat transfer oil is used to generate superheated steam in heat exchangers, which generates 25 MWel in a steam turbine via a coupled generator in full-load operation.
The biomass incineration plant (BMIP) consists of two air-cooled grate combustion systems that generate superheated steam at a pressure of 40 barg and 360°C via thermal oil heaters with an output of 19.5 MW each. This hot steam is used in a condensation turbine to generate electricity.
During the day, this biomass power plant system has the task of compensating for fluctuations in the performance of the heat transfer oil system when solar radiation decreases or changes, thereby keeping the generation of electrical power constant. As dusk begins, the biomass combustion plant is ramped up to full power in order to completely take over electricity generation during nighttime operation. During full-load operation at night, 12.5 MWel are generated in the BMPP.
If there are minor fluctuations in solar radiation - during the day - quickly adjustable natural gas burners can compensate for the fluctuating energy supply to the heat transfer oil system.
The system is designed for the maximum possible system efficiency. By connecting heat exchangers for the preheating of combustion air and heating surfaces for heating the feed water, over 88% is achieved at full load.
To ensure that the temperature in the heat transfer oil circuit does not drop to the pour point during maintenance work or especially in winter, a separate, gas-fired heat transfer oil boiler is used to control the temperature of the heat transfer oil.
Bark, wood chips and natural wood are used as fuel for the biomass combustion plant.
INTEC at ACHEMA 2012 (PDF). MesseKompakt.de. 2012. Retrieved February 18, 2014.