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Impact of Vacuum-Drying on Efficiency of Hardwood Products

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Impact of Vacuum-Drying on Efficiency of Hardwood Products ( impact-vacuum-drying-efficiency-hardwood-products )

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CHAPTER 4 RESULTS OF DRYING QUALITY, TIMES AND COSTS FOR CONVENTIONAL AND VACUUM DRYING One of the objectives of this project is to estimate conventional and vacuum kiln drying quality, times, and costs for 4/4 red oak lumber. Data for comparisons was collected from companies that manufacture drying equipment, companies that use conventional steam and vacuum drying equipment, and the literature review. Four manufactures of vacuum drying chambers were contacted; however only one agreed to supply information. This company will be referred to as company “A”. Five companies were identified as users of vacuum drying technology for their drying operations; however, only one agreed to provide information. This industry will be referred to as company “B”. Three companies using conventional drying (air drying + kiln drying) for their production provided information about drying quality, times and costs. Data collection methods are outlined in section 3.1. 61

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Impact of Vacuum-Drying on Efficiency of Hardwood Products

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