Dear Crispin,
Do I have it right that LHV = HHV (LHV is the latent heat of evaporation from the hydrogen in the biomass)? and the effective heating value is from the moisture in the wood) ? Thanks Frank From: [email protected] [mailto:[email protected]] On Behalf Of Crispin Pemberton-Pigott Sent: Monday, June 25, 2012 1:00 PM To: Stoves Subject: [Stoves] Calculating HHV Dear Friends The publication http://www.dse.vic.gov.au/__data/assets/word_doc/0015/122208/Firewood_Use_in _Victoria.doc has formula given for the calculation of Higher Heating Value (dry basis) of firewood, citing Stucley et al (2004). HHV d.b. = 0.3491*C + 1.1783*H + 0.1005*S - 0.0151*N - 0.1034*O - 0.0211*ash MJ/kg d.b. Where the firewood content of each of the elements listed is entered: C = Carbon H = Hydrogen S = Sulphur N = Nitrogen O = Oxygen Ash = ash Stucley, C.R., Schuck, S.M., Sims, R.E.H, Larsen, P.L., Turvey, N.D. and Marino, B.E. (2004) Biomass energy production in Australia: Status, costs and opportunities for major technologies. RIRDC/FWPRDC L & W Australia / MDBC Joint Venture Agroforestry Program. Publication No. 04/031. If that looks familiar you have been paying close attention. The LHV is calculated as usual based on the moisture content subtracting the latent heat of evaporation. The project brief was (in part) a complete a high-level economic analysis of Victorias firewood market that delivers an estimation of: Ø Firewood consumption patterns, including volume, species preferences, the source of firewood and end uses, with a particular focus on Melbourne and other major regional centres; Ø Firewood supply patterns, including volume, species, region of origin, tenure of origin, pricing and resource security; and Ø The extent to which firewood supplied from public land, administered through DSE, influences Victorias firewood market. Regards Crispin
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