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Frequently asked questions



Wood gas cogeneration storage of wood chips


The universal wood gasification CHP manual in use for Flux-i Biopower 15 kW_e. 


7. Wood gas cogeneration storage of wood chips: 


Fresh forest wood residue has a water content of about 50% and is therefore usually precedes only at the street in the forest in polders and thus experiences a natural pre-drying. 


Nevertheless, the wood at the time of hacking still has a water content of about 35% so that microbial activity in the wood chips is inevitable.


This leads to self-heating with considerable energy losses is why it is important to pay attention as dry as possible to store the timber and to ensure that it can continue to dry well.


This is best achieved by adequate air circulation achieved, which can be ensured by a small fine and green component and a rough wood chip structure. 


A woodchip pile with a high water content or amount of green (leaves or needles) has a strong tendency to mold growth in the condensation zone.


In general, the following measures during storage have proven: - If possible, short storage life (not more than 3 months) - precipitation protection - Adequate ventilation - Optimal storage heights (more than 4 m) - Active drying or cooling 


7.1 wood gas CHP Airy Hall Storage 


A Hall Storage provides as opposed to outdoor storage reliable rain protection and is to be preferred an outdoor storage , It should always be allowing air circulation, so that the steam produced in the natural self-heating can deduct and always new fresh air is supplied. Slits in the walls and the downwind open longitudinal sides have proved it. A sufficient ceiling height should be ensured so that no moisture condenses on the ceiling. 


7.2 Wood gas cogeneration outdoor storage


Wood chips In large amounts a heaping pile of chips on (Rent) outdoors on a firm base offers. The material here is exposed to the weather, but rain is not completely soaked but only on the surface. The majority of the wood chips can still dry by the natural self-heating from the inside out. There are also opportunities to cover the pile. A simple cover with a water- and airtight tarp is not a good solution because of air favors overheating and prevents drying.However, there are other ways for professional coverage of chips Rent. 


7.3 Safety wood chips


Storage During storage of wood fuels in rooms and tanks can go to the deepest parts of the camp to collect health hazardous gases: eg CO2 especially when damp wood chips and CO especially when dry wood fuels (pellets , dry wood chips). is on a adequate ventilation of these areas, including in particular the premises in which the drive of the thrust and Zugböden installed must be respected. Closed storage for wood fuels which to short before storing heat and pressure are drying treated, should not or only under specific safeguards entered (VDI 3464). When transferring the wood fuels should be paid to sufficient dust protection (eg protective mask against wood dust and molds).


15 kW_e Woodgas Generator CHP

Making baseload heat and power

To use grid tie or offgrid 15.000 Watt_electrical power

Heat production 30.000 Watts_thermal power

Biomassconsumption  100...120 tons / year @  8.000 hours/year

Works without any grid, offgrid usage any time 24/7