The importance of accurate measurement of comminuted logging residues’ moisture contents for small-scale forest owners

• Autorzy: Nilsson D. , Pettersson R. , Thörnqvist T. , Nylinder M.

Identyfikatory

DOI

10.12841/wood.1644-3985.149.01

• Języki publikacji: EN

Abstrakty

EN

Bioenergy from logging residues is an important contributor to Swedish energy supplies. Thus, accurate measurements of delivered logging residues’ energy contents are very important for both sellers and buyers. Deliveries’ energy contents are highly correlated with their moisture contents, and thus are determined in southern Sweden (and elsewhere) by measuring their masses and moisture contents. There is insufficient knowledge, however, about the variation in moisture content within and between deliveries, and hence the minimum number of samples needed to obtain the required precision. Thus, these variations were examined in detail in the presented study. Nested analysis of the variance of the acquired data shows that at least nine samples are required to obtain estimates of a delivery’s moisture content with a 3% margin of error. For high volume trade, such as that between forest companies and the energy-conversion industry, current measurement practices are sufficiently accurate. For private forest owners making single deliveries, however, higher precision is required as inaccurate measurements can strongly affect prices.

Słowa kluczowe

EN

forest residues; bioenergy; forest-fuel; scaling; moisture content; private forest owners

• Wydawca: Sieć Badawcza Łukasiewicz - Poznański Instytut Technologiczny
• Czasopismo: Drewno : prace naukowe, doniesienia, komunikaty
• Rocznik: 2016
• Tom: vol. 59, nr 198
• Strony: 99--110
• Opis fizyczny: Bibliogr. 30 poz., rys., tab.

Twórcy

autor

Nilsson D.

• Department of Forestry and Wood Technology, Linnaeus University, Växjö, Sweden

autor

Pettersson R.

• Department of Mathematics, Linnaeus University, Växjö, Sweden

autor

Thörnqvist T.

• Department of Forestry and Wood Technology, Linnaeus University, Växjö, Sweden

autor

Nylinder M.

• Department of Forest Products, Swedish University of Agricultural Sciences, Uppsala, Sweden

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• List of standards
• EN 14918:2010. Solid biofuels – Determination of calorific value
• EN 14778:2011. Solid biofuels – Sampling
• EN ISO 18134-2:2015 Solid biofuels – Determination of moisture content – Oven dry method – Part 2: Total moisture – Simplified method