Proof of Concept Studies for the Practical Application of Joule Heating as a Phytosanitary Treatment for Export Pinus radiata (D. Don) Logs (2013)
Following initial feasibility work in 2007  and a MAFBNZ funded project in 2009 , the Joule heating concept for log sterilization was incorporated into the STIMBR PGP project as section 1.5.2. This report details the construction, commissioning and testing of the log sterilizing apparatus which had largely been conceived and designed by the EPECentre before the start of this project. The procedure for sterilizing test logs is described and the results obtained with two such logs are presented and discussed against the objectives of section 1.5.2. Finally suggestions for further work, refinements to the system and tests to fill gaps in current knowledge are proposed, including the author’s current impression as to how a wharf-side machine might operate. Tests on the first log show that after treatment all measured locations in the timber exceed 56C for over 5 hours. Tests on the second log show that after treatment all measured locations in the timber exceed 56C for over 8 hours and 70C for about 3.5 hours. In both cases this includes the geometric centre of the log. These tests, therefore, show that Joule heat sterilization undoubtedly can work.
ANZSRC Fields of Research30 - Agricultural, veterinary and food sciences::3007 - Forestry sciences::300712 - Wood processing
30 - Agricultural, veterinary and food sciences::3007 - Forestry sciences::300711 - Wood fibre processing
Showing items related by title, author, creator and subject.
Practical Application of Joule Heating to the Sterilization of Plantation Grown Pinus radiata Logs Heffernan WJB (2013)Pinus radiata (D. Don) log exports are one of New Zealand’s major foreign revenue earners, with 12.8 million cubic metres, valued at nearly NZ$1.7 billion, shipped in 2011. Most trading partners require logs to be treated ...
Heffernan WJB; van Herel M; Nursultanov N; Smart T (2016)A team at the University of Canterbury’s Electric Power Engineering Centre (EPECentre) has developed a laboratory machine and process that can rapidly and reliably Joule heat the sapwood of softwood timber. This treatment, ...
Changes in chemistry, color, dimensional stability and fungal resistance of Pinus radiata D. Don wood with oil heat-treatment Dubey, M.K.; Pang, S.; Walker, J. (University of Canterbury. Chemical and Process EngineeringUniversity of Canterbury. School of Forestry, 2011)Pinus radiata wood specimens were heat-treated at 160-210°C in linseed oil and the effects of treatment on chemical composition, color, dimensional stability, and fungal resistance were examined. The degradation of ...