Question 4 a) Estimate the HHV of ponderosa pine wood using equation 4.1. Use the characteristics in Table 4.8. b) What is the error in the estimate? HHV in MJ/ dry kg=0.4571(%C on dry basis )2.70 Table 4.8 Density and volumetric energy content of various solid and liquid fuels Soumer: Grohmann, K., Wyman, C.E., and Himmel, M.E. (1992) Potential for fucls from biomas and wastos, in Emerging Tednologios for Material and Chemical from Biemato (cds. R.M. Rowell. T.P Schultc, and R. Narayan). ACS Symposium Series 476, Washington. DC: American Chemical Society, Lanon, E.D.. Svenningsson. P. and Bjerle, 1. (1989) Biomass gasification for gas turbines power generation, in Elevtricing Efficient End-Uie and New Grmenttion Tedinologier and Their Planning lmplications (eds T.B. Johanson, B. Bodlund, and R.H. William). Lund, Sweden: Lund University Press