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Annual throughput (Mbf/yr) Run times (hr) Kiln cycles per year Average length of kiln run (include loading and unloading time) (days) Number of fans Fan rating (kW) Air drying time (weeks) Final Drying time (hrs) Volume air dry stock (Mbf) Maximum drying temperature (F) Minimum drying temperature (F) Raw Material ($/MBF) 12000 24 25 12.30 35 5 6 295 4,125 180 105 $14,673,750 12000 12000 24 24 91. 46 4 8 * * * * 16 * 96 192 14,197 * 180 180 105 105 $43,634,986 $11,174,443 Continue Table 15 OPERATIONAL VARIABLES Value Value Value Forklift wage ($/yr) $114,000 Lumber graders ($/yr) $160,000 $114,000 $160,000 $67,000 $3.50 $114,000 * $33,500 $3.50 Wage for klin operator and yard supervisor ($/yr) $67,000 Vacuum pump rating kw/1000bf) * Vacuum pump usage * Condenser fan rating * Condenser fan usage * Fuel consumption (gal/day) 13.50 Fuel cost ($/gal) 35 Annual electrical usage attributed to drying (kW/year ) 1845770 Electrical cost ($/kWh) 0.10 Initial MC (%) 20 1.5 1.5 20 20 11 11 25 25 ENERGY COSTS 20 20 1012984 1021310 0.1 0.1 20 70 79PDF Image | Impact of Vacuum-Drying on Efficiency of Hardwood Products
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