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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

A NEW EQUATION FOR ESTIMATING THE EXERGY OF WOODY BIOMASS

Bingxi Li
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, China

Qian Wang
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China

Yaning Zhang
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China; Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, 55108, USA

Hongtao Li
Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, 55108, USA

Xiaoyan Gao
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China

Wenke Zhao
School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China

Abstract

A relationship between the exergy and HVs (heating values) of a fuel bridges a way for estimating the exergy of the fuel. Based on the ash exergy characteristics of sixty four woody biomass investigated in this study, a new equation based on the HHV (higher heating value) and ash exergy is then proposed for estimating the exergy of woody biomass. This new equation has two advantages: (a) avoids the cumbersome work involved in calculating the ash exergy, and (b) cuts the extra work for transferring HHV to LHV (lower heating value). The results obtained from this study also show that the relative errors between the estimated and calculated wood exergy values are mainly between -0.754% and 0.986%, the new equation proposed in this study can therefore be well used for expeditious estimation of the exergy of woody biomass with high accuracies.

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