Quality matters. Robust procedures and tight processes ensure reliability.
All wood fuel is much the same, right?
No. In this quick video Forest Fuels Regional Manager, Jason Gallagher talks through some of the key quality factors for wood fuel.
Oven testing is the definitive way of measuring the moisture content in wood fuel.
A sample is weighed before going into the oven, which is set at 105 degrees Celsius, for up to 24 hours.
The weight is carefully and repeatedly measured until the fibre is completely dry, which is when the weight stabilises. This enables exact calculation of the moisture content that has been dried out from the original sample.
Humimeter testing is another very reliable and accurate method of establishing moisture content in wood fuel.
It has the added benefit of flexibility as the equipment is compact and portable – testing can be conducted on site, in depot or even at the customer’s premises.
The weight, volume and resistance of the wood chip’s inherent moisture are computed. The ambient temperature and humidity are taken into account in order to determine the moisture content of the random wood fuel sample.
Spear testing involves taking the spear and pushing it into the sample wood chip. The digital read-out shows the moisture content detected at the head of the spear.
This is carried out many times in different areas of the wood chip and at varying depths in order to average out the moisture content from the number of readings taken from the range of sample areas tested.
This method is the fastest to deploy. It provides quite accurate moisture content readings (generally within 2%) and is used extensively in the industry.