BioSCHP | Power Generation

BioSCHP

Using BioEnergy Efficiently

 

Efficient power generation

The heart of the system is a biomass gasifier combined with a Stirling engine of up to 36 kWel.

The processed biomass is gasified into a hot gas generator. Subsequently, the lean gas mixture is burned.

During combustion, the air is heated to 1100ºC to feed the Stirling engine, which transforms approximately 30% of the thermal energy into electric energy through an alternator.

Following the principle of combined heat production and the power cycle, the produced usable heat is recycled and can be used for other external heating applications.

At the same time, the residual thermal energy is passed through a heat exchanger to produce hot water at 70-80ºC.

 

Positive energy balance

The system can handle from 50 to 100 kg of fuel per hour. This fuel turns into approximately 36 kWel and 120 kWth.

The sale to the public electric grid is paid according to EU standards.

The heat obtained in the process can be used for air conditioning. Altogether, the system achieves a reduction of input materials around 85% of its volume.

The residue obtained is 15% of that volume as ashes, which can be used for fertilizer production.

Thus, problems associated with waste disposal and fertilization are resolved simultaneously.

 

Combined Heat and Power Energy Production

Chips are fed into the system through a tubular conveyor chain. They reach the upper end of the gasifier and fall into the fixed bed reactor where air is supplied at different heights.

At the end of the process gas and ashes are obtained. The ashes are removed from the system by a worm; while the gas is located opposite the burner combustion chamber (CC).

The hot gas stream is passed through the Stirling engine to extract heat and mechanical energy to a generator that transforms it into electricity.

The Stirling cools the flue gas to 600°C. These gases pass through a heat exchanger to preheat the incoming air to the CC and also produce heat energy in form of hot water.

 

Generating Energy from Biomass

In the BioSCHP system you can increase your profitability while your fuel and waste recycling costs are reduced.

At the same time, this process is contributing significantly to reduce the environmental impact, leveraging its efficient gasification and power generation and renewable heat.

As a result, storage, transport and disposal of biogenic waste are no longer expensive factors, but favor greater savings facilitating buildings nearby the energy supply for conditioning and electricity.

Besides these aspects, the sale or domestic use of the electricity generated contributes significantly to cost savings or can serve as a source of additional income.

Even the residual ashes can be used to produce fertilizer for use in their own land or sell it.

 

Getting the best from biomass. Heat value comparison

The BioSCHP system can be fed with different types of fuels.

Manure, poultry droppings or fermentation residues from biogas plants have high energy content, similar to straw or wood pellets.

 

Regular maintenance

The chosen Stirling engine is particularly suitable for fixed and long-term operations requiring continuous operation and maintenance intervals spaced over time. The recommended maintenance cycle for the engine is 10000 hours (continuous operating time of about 13 months).

This maintenance includes replacement of parts such as pistons and connecting rods, and simultaneous substitution of appropriate gaskets and seals.

All important operating parameters such as temperature and oxygen content are constantly sampled and monitored by the control system.

 

Advantages

  • Waste weight reduction in volume by 85% (15% ash).
  • No more costs for storage, transport and disposal.
  • Performance: 50-100 kg of fuel per hour → 36 kWel + 120 kWth.
  • Remuneration of electrical energy sold to the grid according to official rates.
  • New source of income or savings potential.
  • Increased economic and legislative cuts independence.
  • Technically and economically viable solution.
  • Added value to your building/facility.
  • Client: -
  • Date: 05 May 2013