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Pregled bibliografske jedinice broj: 736976

Energy balance of wood chips production and delivery


Šušnjar, Marijan; Pandur, Zdravko; Horvat, Dubravko; Zorić, Marko
Energy balance of wood chips production and delivery // Natural resources, green technology and sustainable development / Cvjetko Bubalo, Marina ; Radojčić Radovniković, Ivana ; Jakovljević, Tamara ; Vuković, Mladen ; Erdec Hendrih, Dina (ur.).
Zagreb: Faculty of Food Technology and Biotechnology, University of Zagreb, Croatia, 2014. str. 153-158 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


Naslov
Energy balance of wood chips production and delivery

Autori
Šušnjar, Marijan ; Pandur, Zdravko ; Horvat, Dubravko ; Zorić, Marko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Natural resources, green technology and sustainable development / Cvjetko Bubalo, Marina ; Radojčić Radovniković, Ivana ; Jakovljević, Tamara ; Vuković, Mladen ; Erdec Hendrih, Dina - Zagreb : Faculty of Food Technology and Biotechnology, University of Zagreb, Croatia, 2014, 153-158

ISBN
978-953-6893-04-1

Skup
Natural resources, green technology and sustainable development

Mjesto i datum
Zagreb, Hrvatska, 26-28.11.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Energy balance; EROI; wood chips; oak; transport distance

Sažetak
Wood chips are used to produce thermal energy, but the amount of energy obtained by burning depends on the moisture content and the features of the energy plant. Energy balance of production shows the relationship between obtained and invested energy in the production process. This relationship is a key factor in sustainable global energy supply. Energy can not be produced without consumption of some part of the energy, and the proportions in which this occurs is a key indicator of the efficiency of the production process. This paper deals with the issue of the amount of energy required to produce in the process of wood chips production and wood chips transport to the heating plant. When calculating the energy balance is important to include as many input parameters, (parameters of energy consumption), which represents almost impossible task because the one parameter directly binds several others. According to several authors, the relationship obtained and invested energy or Eroii (Energy Return on Investment) for energy wood is 30: 1 which is a better ratio than the production of oil, whose relationship obtained and invested energy is about 20:1. The results of this study show that during the production and supply of wood chips from final felling of oak stands most of the energy used to fuel for machinery and vehicles used in production process. Ultimately relationship obtained and invested energy is approximately 25: 1 in the case of moisture content in the wood chips in the limit (market) value of 35% and the mean distance truck transportation of wood chips of 50 km. This is a satisfactory relationship, but it decreases with a greater transport distance. Such is the case when chips manufactured in Croatia, where due to the lack of heat plants, are transported over long distances to neighboring countries.

Izvorni jezik
Engleski

Znanstvena područja
Šumarstvo



POVEZANOST RADA


Projekt / tema
068-0682111-2112 - Ekološko, energijsko i ergonomsko vrednovanje šumskih strojeva i opreme (Dubravko Horvat, )

Ustanove
Šumarski fakultet, Zagreb