Evaluation of factors influencing calorific value of reed canary grass spring and autumn yield
2013
Platace, R., Latvian Academy of Agricultural and Forestry Sciences, Riga (Latvia) | Adamovics, A., Latvian Academy of Agricultural and Forestry Sciences, Riga (Latvia) | Gulbe, I., Latvian Academy of Agricultural and Forestry Sciences, Riga (Latvia)
Production of pellets requires herbaceous biomass with low moisture and ash content, good combustion ability and ash melting temperature ensuring high-quality performance of the boiler. The research aims at analysing various parameters of reed canary grass (Phalaris arundinacea L.) biomass depending on the harvest (spring and autumn) and determining their suitability for the heat production in Latvia. Moisture and ash content was found out, as well as the highest and the lowest calorific values and ash melting temperatures within various phases. The average moisture indicators of reed canary grass spring harvest comprised 9.85 % and 17 % of fall harvest. Spring-harvest reed canary grass biomass ash content accounted for 3.10 %, whereas in the autumn harvest – 4.65 %. The highest and the lowest calorific value of spring-harvest reed canary grass biomass constituted 18.42 MJ·kgE-1 and 15.27 MJ·kgE-1, respectively, while of the fall harvest - 15.24 MJ·kgE-1 and 13.82 MJ·kgE-1, correspondingly. Ash melting temperature at the beginning of the deformation phase on average reaches 1170 ºC for the spring-harvest reed canary grass biomass and 1295 ºC for the autumn biomass. Acquired results show that reed canary grass biomass harvested in spring is more suitable for the heat production, as compared to autumn samples. Whereas ash melting temperatures are slightly higher for fall-harvest samples, still samples harvested in spring are suitable for heat production.
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